GB2599458A

GB2599458A - Roof mounting system

Info

Publication number: GB2599458A
Application number: GB2100661.4A
Authority: GB
Inventors: Makin Reece
Original assignee: Adverge Ltd
Current assignee: Adverge Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2022-04-06
Anticipated expiration: 2041-01-19
Also published as: WO2022157600A1; GB2599458B; GB202100661D0; US20230358047A1

Abstract

A roof mounting system comprises a planar waterproofing element 10 to be positioned adjacent upper surfaces of a pair of adjacent roof tiles 4 and to extend across a join provided therebetween (vj), the element further comprises an abutment feature 12 extending from the lower surface 11 of the planar member to engage a roof batten and/or an elongate mounting element 20 (fig.7) comprising a body portion to be located between an upper surface of a roof batten and/or an upper surface of the planar element and lower surfaces of overlaying roof tiles or slabs, a first engagement feature 24 configured to engage a roof batten, and a second engagement feature 26 to be received in an opening 28 provided in a lower surface of an overlaying tile. The waterproofing element may be composed of glass reinforced polymers (GRP) and/or comprise a foam member 34, an adhesive, or an upwardly extending ridge. Also disclosed is a method of installing the described system.

Description

ROOF MOUNTING SYSTEM

FIELD

The present invention relates to a roof mounting system for use with traditional as well as reconstituted stone roofing slates for improving the traditional mounting and waterproofing method. In particular, the present invention relates to a roof mounting system which enables roofing materials, such as tiles or slates, to be mounted using a single lap format thereby reducing the weight, cost and installation time involved whilst also improving the performance of the resultant roof covering.

BACKGROUND OF INVENTION

Stone has been used in roofing for many years. Stone slates are usually sedimentary shale that can be split and then shaped into relatively flat layers that can be laid onto timber supports to form a resilient roof covering. The modern embodiment of stone roofing has the stone more consistently cut. In the past 30 years reconstituted (concrete) stone versions have become established and those have taken the most popular sizes and established a more regimented installation method. There are many different sizes of stone, but in essence and for simplification, twelve different sizes are commonly used and consist of (height x width): eaves tiles 17" x 20"; top tiles 12" x 12" and 12" x 18" and a combination of nine other tiles 22", 26" and 30" high by 12", 18" and 24" wide. Special order lengths of 32", 34" and 36" also exist. These tiles are approximately 120-140 Kg per metre sq. in weight. This method of installation, as shown in Figures 1 and 2, is called Random (widths rar') and Diminishing Lengths (ad') taking account of the various widths and gradually decreasing lengths of the slates. This method can also be described as discontinuous roofing.

The system, as shown in Figures 1 and 2, is predominantly for domestic dwelling applications and is used after the timber frame roof has been constructed using rafters (r) and covered in a roofing membrane (m) and then overlaid in an opposite direction using timber spas known as 'battens' (t). Battens are specifically positioned up the roof and over the roof at a set distance called the 'gauge' (g). Battens are often nail fixed into position through the membrane and into the rafters.

Stones traditionally had holes bored through the top and sticks or pegs (p) drop through the holes and the slates are laid on top of these battens (t) so that the peg hooks over the top upper edge of the batten and the stone, using gravity, is held in place. Modern roofs use aluminium or copper pegs with a large head rather like a wide nail without a point.

Starting by using the longest stones from the selection available to the roofer, these stones are laid on the roof in a line transversely across the roof called a course (Figure 2), using a random selection of the widths (ar) available for that length (ad) (or height or gauge) on that course.

The first course or 'eaves course' is a shorter slate for example at 17 inches long and this is the start of installing the slates and usually overhangs into the gutter. This first course is then fully overlaid by the second course of a longer 30-inch slate and thus the slates move up the roof some 13 inches (second course 30 minus the first course). This is the course layout and is the method by which the batten gauge is set. The third course of another 30-inch slate is then installed and this is laid over the top half of the second slate by 17 inches that means that the third course would also cover the top 4 inches of first course in what is called a "double lap" (as shown in Figures 1 and 2). This slate also has a 13" batten gauge.

Where the slates abut each other (or sit side by side) in each course there is an obvious gap or open vertical abutment joint (vj), this joint is called the perpendicular joint or 'perp join'.

The double lap (dl) method as described herein (and illustrated in Figures 1 and 2) is important to prevent any wind driven rain that enters the perp join (formed between adjacent tiles) from being forced over the top of the tile and causing failure in the waterproof requirement of the roof covering.

When the second course of slates is installed, it is critical that the perp join of the course above is positioned above the centre of the tile below by at least 4 inches to either side. This is achieved by using the correct selection of one the different widths that are available and thus this method continues up the roof alternating for each course in an application called 'broken bond'.

Each course is pre-planned to use the correct amount for the width of building per project. The height of the stones is reduced as the installer goes up the roof although the 4-inch double lap of the slate two below must be maintained. This installation method of varying widths (ar, br) getting smaller in height (ad, bd) going up the roof is the random and diminishing style.

Another embodiment of this traditional style of double lap uses regularised and uniform thin units of stone known as roofing slates. These are installed using the same method of waterproofing as the stone with the difference being that they offer a uniform and regularised alternative appearance when installed.

The primary function of the roof is to remain watertight. Therefore, the primary weakness or primary point of water ingress in double lap roof coverings is through the vertical perp' joins (vj) that are part of the double lap stone roofing described herein. It is therefore necessary to overlay these joins in the double lap format so that water entering the join will land on the slate below and this water, using the angle or pitch of the roof, will then descend down the slate below and exit on the surface margin or outer area of the slate.

The secondary weakness on the roof occurs at the front edge of the slates as they lap (I), externally onto the slate below, the rainwater runs down the open plain or surface margin of the slate and over the front edge of the bottom of the slate. As the water drips onto the slate below, wind can drive or push this back under the slate above and between the slate below. Depending on the pitch of the roof the rain being pushed between the slates is rarely if ever pushed more than 4 inches and it is this distance that sets the double lap installation requirement of 4 inches when installing the roof. Any water that is driven or enters between the layer of the slate will often find the predrilled holes that were created to accommodate the pegs (p) or nails when fixing the slates.

It is often that these holes represent the point of ingress should a roofs waterproofing fail. Because this method, through tradition, is quite inefficient in both method and performance then the angle that the roof is framed (pi) should often exceed 40 degrees, this angle is called the pitch (pi) and is an integral part of the waterproofing of this type of roof The installation of roof materials using double lap installation involves a large amount of roof materials, is time intensive and costly. There is therefore a need for a roof mounting system which can be assembled using less roof materials whilst also providing improved performance. There is a need for a roof mounting system which can be assembled in a single layer format, thereby requiring less roof materials.

SUMMARY OF INVENTION

According to a first aspect of the present invention, there is provided a roof mounting system comprising one or more of: a waterproofing element composed of water-impermeable material, in which the waterproofing element comprises a planar member defining a lower surface configured to be positioned adjacent upper surfaces of a pair of adjacent roof materials and to extend across a join provided therebetween to prevent water ingress therethrough, in which the waterproofing element further comprises at least one abutment feature extending from the lower surface of the planar member, at or adjacent a first end thereof, configured for abutment with an underlying roof batten; and/or an elongate mounting element comprising: an elongate body portion configured to be located between an upper surface of a roof batten and/or an upper surface of the planar member of a waterproofing element, and lower surfaces of overlaying roof materials, a first engagement feature configured to engage a roof batten, and a second engagement feature configured to be received within and to engage an opening provided in a lower surface of an overlaying roof material.

The roof mounting system is preferably a single-lap format roof mounting system. The term "single-lap" is used herein to refer to a configuration in which only the front leading edge of a roof material in a second course rests on the rear trailing edge of the roof material in a first course located below the second course.

The roof mounting system of the present invention can be used to mount roof materials (such as for example roof tiles, slates, stones or slabs) more efficiently in a single-lap format, thereby requiring a reduced amount of roof materials to cover a roofing structure. The roof mounting system of the present invention can therefore be used to assemble a roof more efficiently in a single-lap format and at a reduced overall weight and cost.

The installed roof will have the same aesthetic appeal as roofs installed using the conventional double-lap format. However, due to the use of single-lap installation with the roof mounting system of the present invention, a much shorter length of roof material (tile, stone, slate or slab) is required (43% less) in order to cover the same roof structure. As a result, the use of the roof mounting system of the present invention provides a resultant roof which is significantly lighter than a corresponding roof formed using a double-lap format. As a result, use of the roof mounting system of the present invention requires less underlying supporting structure to support the roof. Use of the roof mounting system of the present invention therefore also reduces the costs, materials and time required to provide the roof covering as well as the underlying supporting structure In one embodiment, the waterproofing element is composed of one or more of: metal (for example aluminium), plastic and/or glass reinforced polymers (GRP). Preferably, the waterproofing element is composed of GRP.

Preferably, the at least one abutment feature is an upstanding member extending at an angle to, preferably extending substantially perpendicular, to the plane defined by the planar member (for example the plane defined by the lower surface of the planar member). The upstanding member preferably provides an abutment surface for abutting a roof batten. The upstanding member may for example be a lip portion. The waterproofing element may comprise a plurality of abutment features. The abutment features may be spaced apart from each other, for example uniformly spaced apart from each other along or adjacent the front end of the planar member. The abutment features may for example be a plurality of spaced apart (for example uniformly spaced apart) lip portions.

The properties of GRP do not permit the formation of tight right angles that are required when an upstanding member is formed perpendicular to and from the same planar member. Therefore, the GRP can be formed into a specially adapted outward and downward curved portions. They can be used to allow a resilient and accurate fixing to a roofing batten. When this curve is applied in an outward and downward position, as is required with heavier stone slates, then it ensures that the weight of stone is appropriately transferred to the roof structure. The curve is then used in conjunction with the mounting rail that has a curve of same size and shape, that precisely engages the curve on the GRP and the two curves, are held together by way of gravity. Thus the stone is therefore also held in position on the roof structure. Wien the curve is used with the stone slates then it is positioned in an upwards and outwards manner that is used as a secondary barrier to prevent wind driven rain that is sometimes driven over the top of slates and so prevents water from entering the roof structure.

Stone slates allow the movement of air by a method known as fortuitous ventilation. The waterproofing properties have the adverse effect of restricting the free movement of moist air that can sometimes collect beneath the stone slates. This moist air will rise to the highest point of the roof apex (the ridge) and the system therefore incorporates a specially designed ridge ventilation device.

The waterproofing element preferably further comprises at least one foam member located on the lower surface of the planar member. The waterproofing element may comprise a plurality of spaced apart foam members located on the lower surface of the planar member. The foam member(s) are preferably located at or adjacent an opposed second end of the planar member.

The foam member may have any suitable shape and/or dimensions.

In one embodiment, the foam member is shaped and dimensioned to cover, and preferably engage, at least a portion of a join between adjacent roof materials. In one embodiment, the foam member is substantially wedge shaped. In one embodiment, the foam member is positioned such that an apex of the wedge-shape is configured to be received within and to engage at least a portion of the join formed between adjacent roof materials.

In one embodiment, the waterproofing element further comprises an adhesive portion. The adhesive portion may be located adjacent one or more edges of the waterproofing element to ensure overlaps are sealed.

In one embodiment, the first engagement feature of the elongate mounting element comprises a first upstanding portion located at or adjacent a lower surface of the elongate body portion of the elongate mounting element and extending outwardly therefrom. The second engagement feature of the elongate mounting element preferably comprises a second upstanding portion located at or adjacent an upper surface of the elongate body portion of the elongate mounting element and extending outwardly therefrom.

The first and second upstanding portions preferably extend at an angle to a plane defined by the elongate body portion of the elongate mounting element. The first and second upstanding portions preferably extend substantially perpendicular to the plane defined by the elongate body portion and in opposite directions to each other.

In one embodiment, the first and second upstanding portions of the first and second engagement features of the elongate mounting element are axially aligned.

The first engagement feature of the elongate mounting element may be located at or adjacent a first side portion of the elongate body portion of the elongate mounting element. The second engagement feature of the elongate mounting element may be located at or adjacent a second opposed side portion of the elongate body portion of the elongate mounting element.

In one embodiment, the first engagement feature and an adjacent portion of the lower surface of the elongate body portion of the elongate mounting element define a hook portion configured to engage a roof batten. The hook portion provided by the first engagement feature and the adjacent portion of the lower surface of the elongate mounting element defines an abutment surface extending therebetween configured to abut surface(s) of an underlying roof batten.

At least one of the first and/or second engagement features of the elongate mounting element may comprise at least one projection extending outwardly away from an axis defined by the first and/or second upstanding portions. In one embodiment, at least one of the first and/or second engagement features comprises a plurality of spaced apart projections located along the length of and extending outwardly away from the axis defined by the first and/or second upstanding portions.

The elongate mounting element may further comprise at least one mounting portion comprising a mounting body portion configured to be mounted on at least one of the first and/or second upstanding portions of the first and/or second engagement features. For example, the at least on mounting body portion preferably comprises a slot or recess configured to receive and engage at least a portion of a corresponding first or second upstanding portion of the first or second engagement features.

In one embodiment, the at least one mounting portion comprises at least one projection extending outwardly away from an axis defined by the mounting body portion and/or an axis defined by the first and/or second upstanding portions. The at least one projection may for example be resiliently deformable. The at least one projection may be resiliently biased to extend outwardly away from the axis defined by the mounting body portion and/or an axis defined by the first and/or second upstanding portions.

The mounting body portion may be composed of plastic, for example extruded plastic.

In one embodiment, the at least one mounting portion comprises a plurality of spaced apart projections located along the length of and extending outwardly away from the axis defined by the mounting body portion.

The plurality of spaced apart projections may extend radially from the mounting body portion.

The plurality of spaced apart projections may be spaced apart from each other about the periphery of the mounting body portion.

The projection(s) may have any suitable shape and/or dimensions. In one embodiment, the projection(s) may be ribs.

The first engagement feature of the elongate mounting element may comprise at least one guide feature configured to locate at least one fixing member, for example a nail or a screw, for securement therethrough to a surface of an underlying roof batten. The guide feature may for example be a portion of reduced thickness of the first engagement feature.

The elongate mounting element is preferably composed of metal, for example aluminium.

The elongate mounting element may have any suitable transverse cross-sectional shape. For example, the elongate mounting element may have a substantially cross-shaped transverse cross-section. In one embodiment, the elongate mounting element has a substantially Z-shaped transverse cross-section.

According to a second aspect of the present invention there is provided a method of installing a roof mounting system as herein described comprising: obtaining a waterproofing element composed of water-impermeable material, in which the waterproofing element comprises a planar member defining a lower surface, and at least one abutment feature extending from the lower surface of the planar member, at or adjacent a first end thereof; placing the lower surface of the planar member of the waterproofing element in position adjacent upper surfaces of a pair of adjacent roofs materials such that the planar member extends across a join provided therebetween to prevent water ingress therethrough and securing the abutment feature(s) in position by abutment to an underlying roof batten.

The method may further comprise: obtaining an elongate mounting element comprising: an elongate body portion, a first engagement feature, and a second engagement feature; placing the elongate mounting element in position adjacent the at least one abutment feature and an upper surface of the planar member of the waterproofing element such that the elongate body portion extends substantially parallel to an underlying roof batten, in which the first engagement feature of the elongate mounting element is positioned to engage the underlying roof batten, and in which the second engagement feature is positioned to be received within and to engage an opening provided in a lower surface of an overlaying roof material; and positioning a roof material such that a lower surface thereof is received on an upper surface of the planar member of the waterproofing element, and the second engagement feature of the waterproofing element is received within an opening provided in the lower surface of the roof material.

The method may further comprise securing the elongate mounting element in position by securing the first engagement feature to the underlying roof batten using at least one fixing member.

The method may further comprise forming one or more openings, for example channels or recesses, within the lower surface of the roof material Embodiments of the present invention will be now described in more detail with reference to the accompanying Figures.

BRIEF DESCRIPTION OF FIGURES

Figure 1 is a schematic illustration of a cross-sectional view of a traditional double lap roof; Figure 2 is a schematic illustration of an exploded view of a traditional stone roof installed in the double lap format; Figure 3 is a schematic illustration of a cross-sectional view of a stone roof using the roof mounting system according to one embodiment of the present invention to provide a single-lap format roof; Figure 4 is a schematic illustration of an exploded view of a stone roof installed in the single lap format using the roof mounting system according to one embodiment of the present invention; Figure 5 is a schematic illustration of a cross-sectional view of a stone roof using the roof mounting system according to one embodiment of the present invention, Figure 6 is a schematic illustration of a cross-sectional view of the foam wedge in the perp join of the roof mounting system according to one embodiment of the present invention; Figures 7 and 8 are schematic illustrations of a cross-sectional view and a perspective view of the elongate mounting element of the roof mounting system according to one embodiment of the present invention; Figures 9 and 10 are schematic illustrations of a cross-sectional view and a perspective view of the elongate mounting element of the roof mounting system according to a further embodiment of the present invention; Figure 11 is a schematic illustration of a cross-sectional view of the elongate mounting element of the roof mounting system according to one embodiment of the present invention; Figure 12 is a schematic illustration of a cross-sectional view of a ridge system utilising a roof mounting system and ventilation rail according to one embodiment of the present invention; Figure 13 is a schematic illustration of a cross sectional view, when used with thin stone slates, and when incorporating the hook fixing method, Figure 14 is a schematic illustration of a cross sectional view of ae valley junction of two rooves; Figure 15 is a schematic illustration of a cross sectional view of the soaker embodiment required for a wall abutment; and Figure 16 is a schematic illustration of a ridge vent system that utilises the rib engagement system as shown in Figure 7.

DETAILED DESCRIPTION

With reference to Figures 3 to 6, a single-lap format roof covering is illustrated using the roof mounting system 1 according to embodiments of the present invention.

The timber roof is constructed using rafters (r) and covered in a roofing membrane (m) and then overlaid in an opposite direction using timber spas known as 'battens' (t). Battens are specifically positioned up the roof and over roof at a set distance called the 'gauge' (g). Battens are often nail fixed into position through the membrane and into the rafters.

Starting by using the longest stones (or other suitable roof material such as slate, tiles or slabs) from the selection available to the roofer, these stones are laid on the roof in a line transversely across the roof called a course (Figure 4), using a random selection of the widths (br) available for that length (bd) (or height or gauge) on that course.

The first course or 'eaves course' is a shorter stone for example at 17" long and this is the start of installing the slates and usually overhangs into the gutter.

A waterproofing element (f) composed of water-impermeable material is provided. The waterproofing element (f) is a permanently resilient front plate composed of glass reinforced polymer (GRP). It is however to be understood that in some embodiments, the waterproofing element may be composed of metal (for example aluminium) or other suitable plastics.

The waterproofing element (f) comprises a planar member 10 defining a lower surface 11 and further comprises at least one abutment feature 12 extending from the lower surface of the planar member 10, at or adjacent a first end thereof, configured for abutment with a roof batten. The abutment feature 12 has a first end 13 located adjacent the lower surface 11 of the planar member 10 and an opposed free end 14. A pre-adhered foam strip 15 is located adjacent the second opposed end of the planar member 10.

The waterproofing element (f) is shaped and dimensioned such that the lower surface 11 of the planar member 10 is to be positioned adjacent the upper surfaces 2 of a pair of adjacent roof materials 4 in the underlying first course and to extend across a join (vj) provided therebetween to prevent water ingress therethrough.

The waterproofing element (f) is arranged to extend from adjacent or at the rear trailing edge 6 and towards the front leading edge 8 of the underlying roof materials 4.

For ease of installation the waterproofing element (f) may have a pre-determined length and in order to adequately cover the width of the whole roof the waterproofing element (f) can be easily lapped over each at the point that they abut each other. A strip of adhesive tape may be provided onto the sides of the lapped section so that this lap joined is permanently sealed during installation.

In one embodiment, the water proofing element (f) may be cut to size as required for a particular pair of adjacent roof materials and the join provided therebetween.

The abutment feature 12 of the waterproofing element (f) is provided in the form of a downwardly extending lip incorporating a locating curve 101 that is extending from the lower surface 11 of the planar member 10. The lip 12 has an inner surface 16 configured to abut an underlying roof batten (t) and an opposed outer surface 18. The inner surface 16 of the lip 12 together with an adjacent portion of the lower surface 11 of the planar member 10 and in conjunction with 101 form a hook portion. The lip (in particular the hook portion) of the waterproofing element is placed to hook over and abut a portion of the underlying roof batten (t). It is to be understood that the abutment feature 12 may extend at any suitable angle relative to the plane defined by the planar member. Preferably, the abutment feature 12 (e.g. lip) extends substantially perpendicular to the plane defined by the planar member.

A second embodiment of the waterproofing element is shown in Figure 13 is suitably adjusted for the installation of thin stone slates la whereby the planar member 10 incorporates a locating and waterproofing upwards curve 102, the curve will resist the further transfer of water and facilitates the use standard slate slates hooks 300.

Once in position between adjacent courses of roof materials, the foam strip 15 of the waterproofing element 10 prevents wind driven rain from penetrating underneath the leading edge of the roof material 4.

Figure 6 illustrates the system 1 further comprising foam wedges 34 which are shaped and dimensioned such that at least an apex of the wedge 34 can be received within a join formed between adjacent roof materials. The wedges 34 may be elongate in shape and extend along a length of the join between the adjacent roof materials. The system 1 may comprise a plurality of foam wedges, each wedge being configured to be received within a corresponding join formed between adjacent roof materials. The foam wedge 34 is configured to prevent rain from being driven between the join whilst also allowing water vapour to pass through the join and the wedge to prevent the build up of moisture in the void created by the height of the battens.

Once the waterproofing element (f) is in position, an elongate mounting element 20, 120 as illustrated in any of Figures 7 to 11 is then selected.

The elongate mounting element 20, 120 has an elongate body portion 22, 122 configured to be located between an upper surface 9 of the planar member 10 of the waterproofing element (f), and lower surfaces 5 of overlaying roof materials; the curved internal profile of 20 at 202 having the same radius of curvature as the curved external profile of 10 at 101 a first engagement feature 24, 124 configured to engage a roof batten (t), and a second engagement feature 26, 126 configured to be received within and to engage an opening 28 provided in a lower surface of an overlaying roof material 4.

The roof material, for example stone, can be cut using for example circular diamond coating cutting wheels to provide a uniform slot in the underside of the covering 4 towards the rear trailing edge 6 of the covering 4. The second engagement feature 26, 126 of the elongate mounting element 20, 120 is shaped and dimensioned to be received within and to engage with this slot 28.

The elongate mounting element 20, 120 is positioned on top of the waterproofing element (f) at the rear trailing end 6 of the roof material 4 such that the first engagement feature 24, 124 abuts the outer surface 18 of the lip 12. The first engagement feature 24, 124, in some embodiments, is dimensioned to extend beyond the free end 14 of the lip 12 of the waterproofing element (f).

The first engagement feature 24, 124 of the elongate mounting element 20, 120 further provides a guide feature 30, 130 in the form of a portion of reduced thickness extending between the inner and outer surfaces thereof. The installer inserts a fixing member 32, 132, such as for example a screw, through the guide feature to engage the batten located behind the mounting element 20, 120.

The second engagement feature 26 may comprise a plurality of protrusions 23 (for example ribs) extending outwardly from the axis defined by the second engagement feature 26, as shown in Figures 7 and 8. The free end of the second engagement feature 126 may provide a hooked portion, as shown in Figures 9 and 10. The hooked portion may extend at any angle from the axis defined by the second engagement feature, for example extending at about 120°. In one embodiment, as illustrated in Figure 11, the elongate mounting element 120 may further comprise a mounting portion 150 comprising a mounting body portion 152 configured to be mounted on the second engagement feature (in the form of an upstanding portion). The mounting portion 150 comprises a plurality of spaced apart protrusions 154 in the form of ribs extending outwardly away from an axis defined by the mounting body portion 152 and the axis defined by the second engagement feature 226.

The outwardly extending protrusions are resiliently deformable and help improve the grip between the opening or slot of the roof material located and the second engagement feature 26, 126, 226 in order to provide a more secure roof covering.

As illustrated in Figures 7 and 8, the inner surface of the first engagement feature 24 comprises a plurality of spaced apart protrusions 34 in the form of ribs extending outwardly from the axis defined by the first engagement feature 24. The protrusions 34 extend substantially parallel to each other and in a direction extending towards the elongate body 22 of the elongate mounting element 20. In use, these protrusions about the trailing rear edge of an adjacent roof material providing improved grip to help retain the mounting system 1 and overlaying roof materials in position on the structure.

The elongate mounting element 20 of Figures 7 and 8 has axially aligned first and second engagement features 24, 26 resulting in the element 20 having a substantially cross-shaped transverse cross-section. In contrast, the elongate mounting element 120 of Figures 9 and 10 has a substantially 7-shaped transverse cross-section.

With reference to Figures 9 and 10, the first engagement feature 124 is located at or adjacent a first side portion 140 of the elongate body portion 122 of the elongate mounting element 120. The second engagement feature 126 is located at or adjacent a second opposed side portion 142 of the elongate body portion 122 of the elongate mounting element 120.

It is to be understood that the configuration of the elongate mounting element 20, 120 may be selected depending on the particular requirements for the roof covering and underlying roof structure.

In some embodiments where thin roof materials are used, such as for example slate, the waterproofing element (f) of the present invention may be used in combination with a slate hook 300 rather than the elongate mounting element described herein, as shown in Figure 13.

Once the roof mounting system 1 has been installed along the roof materials of the first course, the second course of roof materials are positioned along the upper surface 9 of the waterproofing element and the elongate body 22 of the elongate mounting element 20, 120. The second engagement feature 26, 126 is received within the corresponding slot 28 of the roof material 4 by pressing.

The process is then continued for a third and subsequent courses until the roof covering is complete as shown in Figure 12. When the installation of the stone reaches the apex of the roof then this upper section must be capped. Traditionally this is done with the uses of a stone ridge cap that is set in place using cement mortar. Modern construction methods require that apex of the roof is ventilated and therefore the use of a specialist ridge vent system is required.

So that the ridge is adequately ventilated a vent can be joined to the stone utilising a standard slot in the stone that having the same mounting method of 26 and 23 with the embodiment incorporating a vented strip that is used to remove the moist air that accumulates in the void below the GRP and above the membrane figures 12, 16, 17.

The roof mounting system of the present invention therefore enables a roof covering to be provided in a single lap format thereby saving materials, time, labour and reducing the overall weight of the resultant roof covering whilst also improving the waterproofing properties of the roof covering.

The roof mounting system of the present invention prevents the ingress of water through the perp join provided between adjacent roof materials by the use of the waterproofing element (f) and as a result the roof covering does not require the use of a double lap format (dl).

The roof mounting system 1 of the present invention can be applied to various roof geometries as discussed below: When two plains of a roof meet at an internal junction, a valley is formed and it is necessary to form a waterproof join between the adjacent roof materials. In order to ensure that the traditional appearance of the roof is maintained, the waterproof element (f) is joined onto a waterproof under valley (v) (as shown in Figure 14) that is not visible and yet ensures that the water cannot enter the roof through the cut mitre (by) in the stone valley join. So that the installer might ensure a straight join when installing this invisible junction on the roof, the valley incorporates a centre line (vc) that provides an accurate location for the cut and also acts to stop debris that might permeate through the open joint in the mitre from entering onto the water channels (vw) so as to ensure that the rain water might flow uninhibited down the valley.

By the design of the valley any excessive storm water simply flows down the upper surface of the mitre and does not have the chance to enter the valley through the gap in the stone mitred. The water channels (vw) have additional water stops (vs, v1) that further prevent the water in the valley from tracking into the roof. The valley also has a flat section that allows battens (t) and front plate to overlap the valley and ensure that water cannot enter through the valley.

When a roof abuts a wall then there must be a specific join made (Figure 15). The method of abutment is called a soaker (u), normally these soakers are from metals such as lead. Because the front plate is from GRP then metal cannot be used so a GRP soaker must therefore be used. These soakers incorporate an adhesive strip (us) to enable the weatherproof joining of the soaker onto the front plate. The soakers are bent perpendicular by way of an elongated 'S and by this required shape the soaker can accommodate the lower sharp corner of the stone and return to close the gap at the top edge. The soakers are cut specifically to fit the specific size of each piece of stone.

It is appreciated that variation to the aforementioned embodiments may be made without departing from the scope of the invention as defined by the claims.

Claims

CLAIMS1 A roof mounting system comprising one or more of: a waterproofing element composed of water-impermeable material, in which the waterproofing element comprises a planar member defining a lower surface configured to be positioned adjacent upper surfaces of a pair of adjacent roof tiles or slabs and to extend across a join provided therebetween to prevent water ingress therethrough, in which the waterproofing element further comprises at least one abutment feature extending from the lower surface of the planar member, at or adjacent a first end thereof, configured for abutment with a roof batten; and/or an elongate mounting element comprising: an elongate body portion configured to be located between an upper surface of a roof batten and/or an upper surface of the planar member of a waterproofing element, and lower surfaces of overlaying roof tiles or slabs, a first engagement feature configured to engage a roof batten, and a second engagement feature configured to be received within and to engage an opening provided in a lower surface of an overlaying roof tile or slab.
2 A roof mounting system as claimed in claim 1, in which the waterproofing element is composed of one or more of: metal, plastic and/or glass reinforced polymers (GRP).
3 A roof mounting system as claimed in either of claims 1 or 2, in which the at least one abutment feature is an upstanding member extending substantially perpendicular to the plane defined by the planar member, in which the upstanding member provides an abutment surface for abutting a roof batten.
4 A roof mounting system as claimed in any one of claims 1 to 3, in which the waterproofing member further comprises at least one foam member located on the lower surface of the planar member.
A roof mounting system as claimed in claim 4, in which the at least one foam member is located at or adjacent an opposed second end of the planar member.
6 A roof mounting system as claimed in any preceding claim, in which the waterproofing element further comprises at least one ridge extending outwardly from an upper surface of the planar member and located at or adjacent the first end thereof.
7 A roof mounting system as claimed in any preceding claim, in which the waterproofing element further comprises an adhesive portion.
8 A roof mounting system as claimed in any preceding claim, in which the first engagement feature comprises a first upstanding portion located at or adjacent a lower surface of the elongate body portion of the elongate mounting element and extending outwardly therefrom, and in which the second engagement feature comprises a second upstanding portion located at or adjacent an upper surface of the elongate body portion of the elongate mounting element and extending outwardly in opposite directions therefrom.
9. A roof mounting system as claimed in claim 7, in which the first and second upstanding portions of the first and second engagement features of the elongate mounting element are axially aligned.
10.A roof mounting system as claimed in either of claims 7 or 8, in which the first engagement feature is located at or adjacent a first side portion of the elongate body portion of the elongate mounting element, and in which the second engagement feature is located at or adjacent a second opposed side portion of the elongate body portion of the elongate mounting element.
11.A roof mounting system as claimed in any one of claims 7 to 10, in which the first engagement feature and an adjacent portion of the lower surface of the elongate body portion provides a hook portion configured to engage a roof batten.
12.A roof mounting system as claimed in any one of claims 7 to 11, in which at least one of the first and/or second engagement features comprises at least one projection extending outwardly away from an axis defined by the first and/or second upstanding portions.
13.A roof mounting system as claimed in claim 12, in which at least one of the first and/or second engagement features comprises a plurality of spaced apart projections located along the length of and extending outwardly away from the axis defined by the first and/or second upstanding portions.
14.A roof mounting system as claimed in any one of claim 7 to 11, further comprising at least one mounting portion comprising a mounting body portion configured to be mounted on at least one of the first and/or second upstanding portions of the first and/or second engagement features, in which the at least one mounting portion comprises at least one projection extending outwardly away from an axis defined by the mounting body portion and/or an axis defined by the first and/or second upstanding portions.
15.A roof mounting system as claimed in claim 14, in which at least one of the at least one mounting portion comprises a plurality of spaced apart projections located along the length of and extending outwardly away from the axis defined by the mounting body portion.
16.A roof mounting system as claimed in any one of claims 12 to 15, in which the projection(s) are resiliently deformable.
17.A roof mounting system as claimed in any one of claims 7 to 16, in which the first engagement feature comprises a guide feature configured to locate at least one fixing member for securement therethrough to a surface of an underlying roof batten.
18.A roof mounting system as claimed in any preceding claim, in which the elongate mounting element has a substantially cross-shaped transverse cross-section
19.A roof mounting system as claimed in any preceding claim, in which the elongate mounting element is composed of aluminium.
20.A roof mounting system as claimed in any preceding claim, in which the elongate mounting element has a substantially Z-shaped transverse cross-section.
21 A method of installing a roof mounting system as herein described comprising: obtaining a waterproofing element composed of water-impermeable material, in which the waterproofing element comprises a planar member defining a lower surface, and at least one abutment feature extending from the lower surface of the planar member, at or adjacent a first end thereof; and placing the lower surface of the planar member of the waterproofing element in position adjacent upper surfaces of a pair of adjacent roof tiles or slabs such that the planar member extends across a join provided therebetween to prevent water ingress therethrough and securing the abutment feature(s) in position by abutment to an underlying roof batten.
22.A method as claimed in claim 21, further comprising: obtaining an elongate mounting element comprising: an elongate body portion, a first engagement feature, and a second engagement feature; placing the elongate mounting element in position adjacent the at least one abutment feature and an upper surface of the planar member of the waterproofing element such that the elongate body portion extends substantially parallel to an underlying roof batten, in which the first engagement feature is positioned to engage the underlying roof batten, and in which the second engagement feature is positioned to be received within and to engage an opening provided in a lower surface of an overlaying roof tile or slab; and positioning a roof tile or slab such that a lower surface thereof is received on an upper surface of the planar member of the waterproofing element, and the second engagement feature of the waterproofing element is received within an opening provided in the lower surface of the roof tile or slab.
23.A method as claimed in claim 22, further comprising securing the elongate mounting element in position by securing the first engagement feature to the underlying roof batten using at least one fixing member.
24.A method as claimed in any of claims 21 to 23 wherein a vented strip is joined to the uppermost ridge so as to provide additional ventilation to a void beneath the stone slates.
25.A method as claimed in any of claims 21 to 24 wherein an S-shaped soaker is used to close the gap between the stone slates and an abutment wall.