EP4006256A1

EP4006256A1 - Ridge mounting and ventilation system

Info

Publication number: EP4006256A1
Application number: EP21211111.6A
Authority: EP
Inventors: Reece Makin
Original assignee: Adverge Ltd
Current assignee: Adverge Ltd
Priority date: 2020-11-27
Filing date: 2021-11-29
Publication date: 2022-06-01
Anticipated expiration: 2041-11-29
Also published as: GB202018689D0; GB2601351A; EP4006256B1

Abstract

The present invention provides a ridge mounting and ventilation system that utilises at least one pair of flat natural stone in conjunction with glass-reinforced polyester (GRP or similar) and a mounting system to form a modern, ventilated, high performance ridge that faithfully emulates a traditionally hewed stone ride and yet can be mechanically fixed and provide ventilation to the apex of an installed roof structure.

Description

FIELD

The present invention provides a natural stone ridge configured for mechanical fixation to an apex of a roof structure. The present invention also provides a natural stone ridge configured to provide ventilation to a roof space of a roof structure.

BACKGROUND OF INVENTION

Roofs are predominantly triangular shaped timber structures with resemblance to a tent or pyramid that sit on the top of a building so as to direct rainwater and snow water away from the building. These structures are covered with a variety of resilient weather proof roof coverings in various forms such as stone, slates, clay and concrete so as to remain waterproof.
When installed, a roof has an arrangement of flat sides that lean together. Typically, there are two different aspects of a roof structures. A first aspect of a roof structure is for example a tent shaped roof as shown in Figure 1 which has two sides that lean together at the upper horizontal edge called a ridge. A second aspect of a roof structure is a pyramid shaped roof as shown in Figure 2 which has four sides that lean together at the angular side edges called hips.
Stone has been used in roofing for many hundreds of years, the stone slates are usually formed from sedimentary shale that can be split and then shaped into relatively flat layers. Figures 3 and 4 illustrate roofing formed from stone slates (C) laid onto timber supports of a roof structure (D) to form a resilient roof covering. Ridge tiles (E) are placed at the very top of the roof structure so as to cover the intersection between the different flat plains of the roof. The ridge tiles can be made in several different angles, sizes and colours.
Figures 3 and 4 illustrate the use of ridge tiles on two slightly different aspects of a roof. Figure 3 shows a tent shaped roof in which the upper point at which two opposite sides converge is called the apex (marked with "X" in Figure 1). Figure 3 illustrates a traditional method of cement bedding a ridge. The ridge tile (E) is an angular piece of stone (having a 90-degree cross-section, forming an upside down 'V') and is set in position over the junction between the two opposite sides at the apex. Cement (F) is used to secure the ridge tile in position, thus forming a weatherproof seal and completing the roof installation.
The pyramid shaped roof (as shown in Figure 2) is formed when two adjacent sides of a roof meet externally and as a result the junction is a compound angle, and the plane of the junction is shallower. These side ridge junctions are known as a hip ridge and hip ridge tiles and are used to seal this junction typically forms an angle of around 120 degrees.
The traditional aspect of the installed stone roof has an extremely desirable aesthetic and, in many areas where these types of roofs are prevalent, the use of traditional stone is required under local authority planning regulations. Angular ridge tiles are however typically hewed from a solid piece of stone. This can be extremely laborious and expensive.
Concrete alternatives have been developed and these are used as a substitute for stone ridges. These replica stone ridges have been found to have shorter life spans than natural stone ridges and the replica stone ridges can 'wash out' over time.
Homeowners require that modern dwellings are air tight and energy efficient. However, this has the side effect of retaining moisture levels within the structure. Through the action of convection, this moisture permeates into the roof space and ultimately collects at the highest point of the roof apex. Ridge systems that are set in place using cement mortar form an airtight seal that can trap this moisture. As the air cools, the moisture condenses into water droplets that collect on the underside of the cold slates and run down the roof between the layers of slate, ultimately staining the roof. When a flow of air is allowed under the ridge and used in conjunction with a gap in a membrane, then the roof space can be adequately ventilated in accordance with modern construction requirements.
In order for the ridge to be ventilated, roof ventilation systems exist that utilise metal brackets that are mechanically fixed to the roof frame. These brackets are used to fix and locate a ridge runner batten (i.e. a standard length of roofing timber running along the apex of the roof line and directly below the ridge) to which the ridge tiles are mechanically fixed. In order to hold the ridge tiles in place, there are a variety of preformed plastic joining brackets that are placed onto the end of each tile prior to installation. These joining brackets enable each ridge tile to abut the previous ridge tile whilst at the same time sealing the join and holding the tiles in place. The gaps under the linear edge of the ridge tiles are further weatherproofed with the additional use of commonly available ridge roll that seals and ventilates the gaps, especially on profiled tiles. Figure 4 illustrates the passage of moist air that is drawn through a modern, vented ridge as described above.
There are many conventional examples of ridge ventilation systems for use with conventional ridge tiles, for example with concrete or clay ridge tiles, which allow a small gap around the edge of the ridge tiles to enable free movement of air below the ridge tile that carries away moisture.

PRIOR ART

United States patent application number US 2012/0096782 (Railkar et al ) discloses a ridge ventilation system that includes a plurality of ridge vent sections configured to be arranged end-to-end along the ridge of a roof covering a vent slot. Each ridge vent section has an elongated longitudinally flexible top panel with a central portion.
Edge portions terminates at extreme edges of the top panel and ventilation grids extend beneath and along the edge portions spaced from extreme edges thereof. The space between the extreme edges of the top panel and the ventilation grids forms or defines an overhang configured to receive edges of shingles in a course of shingles installed next to the vent section and to inhibit the edges of the shingles from rising up.
International patent application number WO-A-97/21007 (Gibbs ) discloses a roofing ridge (or hip) installation which includes a roof under structure with a pair of outwardly sloping walls which form an inverted V-shaped ridge. A support panel is mounted on each of the walls with the lower end of each support panel optionally terminating in an upwardly facing channel. Tiles such as slates are mounted in each channel.
A pressure applying assembly forces the base end of the panels inwards and a cap spans across and covers the upper ends of the panels and assembly.
The need to comply with planning regulations by using stone ridges however conflicts with modern requirements of the dwelling and building regulations which require ridge tiles to be both ventilated and to be secured in place using mechanical fixings. A traditionally installed stone ridge that is set in place using cement mortar cannot meet these modern requirements. There are however no roof ventilation systems available which are compatible with the use of stone ridge tiles.
There is therefore a need for a roof structure ventilation system for use in providing a ventilated roof structure utilising natural stone components, such as for example stone ridge tiles and/or stone slates.

SUMMARY OF INVENTION

According to a first aspect of the present invention there is provided a ridge mounting and ventilation system comprising: at least a pair of flat natural stone slates bonded one to another along their mitred edges to define a ridge, characterised in that the ridge overlays a glass-reinforced polyester (GRP) liner; and at least one spacer is located at or adjacent each lower edge of the slates to space the lower edge from a surface on which the slates rest to define an opening for ventilating the apex of an installed roof structure.
Spacers may be defined by relatively raised and lowered portions formed along lower edges of the flat natural stone slates or they may comprise separate pieces as described below.
The invention solves problems associated with ventilating a roof space whilst maintaining mechanical integrity and strength of the ridge mounting and provides an aesthetic and natural appearance by ensuring that the ridge mounting and ventilation system comprises at least one pair of flat natural stone slates. Each pair of flat natural stone slates is configured to abut one another along their edges to form a weatherproof ridge, in which glass reinforced polyester (GRP) is adhered or mechanically fixed to inners faces of each of the natural stone slates thereby forming a weatherproof connection between.
Unlike previous systems, some of which used a flexible polythene membrane which was prone to tearing and lacked strength, the present invention has a rigid waterproof backing which provides a mechanical substrate that is strong. Optionally polyester resin used to fabricate the glass reinforced polyester may be placed in the gap between the pair of flat natural stone slates and extends through the thickness of each natural stone across the entirety of the joint between them.
Alternatively, or in addition to, an additional binding material may be used to join the pair of natural stone slates at their mitred faces.
The ridge formed between the pair(s) of natural stone slates may be formed to include any suitable angle, depending on the particular requirements of the roof structure. The ridge formed between the pair(s) of natural stone slates preferably has an angle of around 90°, for a tent-shaped roof structure, and an angle of about 120° degrees, for a pyramid-shaped roof structure.
The glass-reinforced polyester (GRP) preferably provides a continuous layer extending between the at least one pair of natural stone slates. The glass-reinforced polyester (GRP) may include a preformed liner made from polymers or similar materials to form a permanent joint extending between the pair of natural stone slates.
Preferably, the glass-reinforced polyester (GRP) or preformed liner made from polymers or similar preferably provides a continuous layer extending along the inner surfaces of each of the natural stone slates within the pair of slates and extending between the pair of natural stone slates to form the permanent joint.
The at least one pair of slates preferably further comprises at least one securement means configured to receive and adhere to the glass reinforced polyester or preformed liner made from polymers or similar to form a mechanical joint thereto.
The, or each, natural stone or stone slate may comprise a plurality of securement means in any suitable configuration in order to provide a plurality of mechanical joins between the slate and the layer of glass reinforced polyester (GRP) or preformed liner made from polymers or similar
The at least one securement means may comprise any feature that is suitable to provide a mechanical join between the slate and the glass reinforced polyester (GRP) or preformed liner made from polymers or similar. In one embodiment, the at least one securement means comprises a recess extending from the inner surface towards the outer surface of natural stone slate. The recess may have any suitable shape and/or dimensions. In one embodiment, the or, each recess is substantially V-shaped, for example butterfly-shaped.
In one embodiment, each flat natural stone slate of each pair of flat natural stone slates comprises a first end configured to abut a first end of the other corresponding flat natural stone slate within the pair, and a second opposed free end. The system preferably further comprises at least one spacer configured to be located at or adjacent the second free end thereof.
The at least one spacer is configured to abut an underlying apex of an installed roof structure and to support the adjacent flat natural stone slate thereon at a predetermined location spaced apart from the underlying apex. The spacer(s) is configured to provide spacing between the slate and the underlying roof structure to enable air to pass therebetween providing ventilation to the roof structure, especially the apex of the roof structure.
The spacer(s) may have any suitable shape and/or dimensions to provide at least one passageway for air, in which the passageway extends from the cavity provided within the roof structure (preferably at or adjacent the apex) and an external air environment.
In one embodiment, the at least one spacer has a first end configured in use to located between the glass reinforced polyester and the corresponding surface of the natural stone slate, and a second opposed free end configured to contact and abut an underlying apex of an installed roof structure.
The first free end may be configured to form a mechanical join with the corresponding surface of the natural stone slate. For example, the first free end may be curved or hooked in shape to engage with an opening or recess provided in the natural stone slate. The first free end may be adhered to the corresponding surface of the natural stone slate by a layer of glass reinforced polyester or preformed liner made from polymers or similar
In one embodiment, the at least one spacer defines a mounting edge extending from the first end towards the second free end thereof, in which the mounting edge is configured to abut and support a surface of the natural stone slate.
The second free end of the at least one spacer preferably comprises an outwardly extending portion extending in a direction away from the mounting edge. The outwardly extending portion is preformed and formed from polymer materials or in a curved or hooked portion.
The at least one spacer may be S-shaped or Z-shaped, preferably Z-shaped.
In one embodiment, the at least one spacer is formed from metal, for example from aluminium.
The system preferably further comprises at least one first attachment member configured to extend from a permanent joint formed by glass reinforced polyester (GRP) or preformed liner made from polymers or similar extending between adjacent natural stone slabs to engage an adjacent first surface of a ridge runner batten. The at least one first attachment member is preferably a threaded attachment member configured to engage a ridge runner batten, for example by a threaded connector.
The system may further comprise a sealable fixing locater prepositioned at a predetermined location on the permanent joint formed by GRP or preformed in polymers extending between adjacent natural stone slabs. The sealable fixing locater is preferably configured to receive a first attachment member extending therethrough.
In one embodiment, the system further comprises at least one corrosion resistant mounting bracket configured to be mountable on an apex of a roof frame, and configured to receive, engage and/or support a second surface of a ridge runner batten thereon. The corrosion resistant mounting bracket is preferably composed of corrosion resistant material, such as for example polymer(s).
The system may comprise at least one first attachment member configured to extend from a permanent joint formed by GRP or preformed liner made from polymers or similar extending between adjacent natural stone slabs to engage an adjacent first surface of a ridge runner batten. The system may further comprise at least one corrosion resistant mounting bracket configured to receive, engage and/or support a second opposed surface of a ridge runner batten. In one embodiment, the at least one first attachment member may be vertically aligned with at least one corrosion resistant mounting bracket.
The corrosion resistant mounting bracket(s) may comprise a first end providing a first channel shaped and dimensioned to receive the apex and a second opposed end providing a second channel shaped and dimensioned to receive the batten. The first and second channels may have any suitable shape and dimensions. In one embodiment, the corrosion resistant mounting bracket(s) comprises a first end providing a V-shaped channel with wings angled and configured to be support so as to accommodate the roof pitch variation when on the apex, and an opposed second end providing a U-shaped channel for receiving a ridge runner batten thereon.
The system may further comprise at least one second attachment members located adjacent a first channel and configured for engaging the apex of a roof structure. The second attachment members may for example be located at or adjacent and extending outwardly from the first channel. The second attachment feature may further comprise a threaded member for threaded engagement with a corresponding surface of the apex of the roof structure.
The ridge, formed by a pair of natural stone slates, preferably comprises a front surface, and opposed rear surface, extending between the upper and lower surfaces of the slates. In one embodiment, the layer of GRP or preformed liner made from polymers or similar extends beyond at least one of the front and/or rear surface. The extended layer of GRP or similar (beyond the front and/or rear surface of the ridge) is configured to prevent water ingress between adjacent ridges (i.e. between adjacent pairs of natural stone slates).
In one embodiment, the extended layer of GRP or a material with similar properties provides one or more ribs extending substantially perpendicular to the longitudinal axis of the ridge. The one or more ribs prevent tracking of water underneath the ridges.
In one embodiment, one or more sealable fixing locator may be located on the extended layer of GRP or preformed liner made from polymers or similar
The system may further comprise at least one alignment member located at or adjacent a front and/or rear surface of the ridge. The at least one alignment member may be configured to engage and secure to an extended layer of GRP or a material with similar properties of an adjacent ridge, thereby enabling a plurality of ridges formed from a plurality of pairs of natural stone slates to be aligned and secured together to form a water tight ridge along a roof structure.
There may also be provided a natural stone ridge configured for mechanical fixation to an apex of a roof structure.
Preferably, the natural stone ridge comprises at least one pair of natural stone slabs adhered to layer of glass reinforced polyester (GRP) or preformed liner made from polymers or similar extending therebetween.
There may also be provided a natural stone ridge configured to provide ventilation to a roof space of a roof structure.
Preferably, the natural stone ridge comprises at least one natural stone component comprising an inner surface and an opposed outer surface, at least one spacer configured to be secured to an inner surface of the at least one natural stone component, and a layer of GRP or a material with similar properties adhered to the inner surface of the natural stone component.
The natural stone ridge may further comprise at least one spacer configured to support flat natural stone slate positioned thereon at a predetermined location spaced apart from an underlying apex of a roof structure.
The invention may be supplied as a kit for forming a natural stone ridge configured for mechanical fixation and/or ventilation, the kit comprising:

glass-reinforced polyester (GRP) or preformed liner made from polymers or similar configured to adhere or mechanically fixed to at least one natural stone component; and
a mounting system comprising one or more of:
- at least one spacer configured to support flat natural stone slate positioned thereon at a predetermined location spaced apart from an underlying apex of a roof structure; and/or
- at least one corrosion resistant mounting bracket configured to be mountable on an apex of a roof structure, and configured to receive, engage and/or support a second surface of a ridge runner batten thereon.

The kit may comprise a plurality of spacers covering a range of different dimensions and/or shapes such that the user can select a suitable spacer for a given roof structure.
According to a second aspect of the present invention there is provided a method for producing a ridge mounting and ventilation system comprising the steps of:

adhering a layer of glass reinforced polyester liner to at least one pair of flat natural stone slates whose edges are mitred, such that the glass-reinforced polyester liner extends therebetween forming a permanent joint; and
forming or securing a spacer to at least one natural stone slate, in which the spacer is configured to support a lower edge of the natural stone slates when positioned thereon at a predetermined location spaced apart from an underlying apex of a roof structure.

The present invention provides a system for providing a ridge for a roof structure which is able to comply with planning regulations (so as to be formed from natural stone) as well as effectively reducing moisture levels within a roof space. The system of the present invention is able to provide a ridge which can be mechanically secured to a roof structure whilst also providing ventilation to an underlying roof space. The system of the present invention is also flexible enough to enable a ridge to be formed from natural stone slabs having the required angle for a particular apex. The system of the present invention has also been found to have an increased life span due to using components which are corrosion resistant.
Embodiments of the present invention will now be described with reference to the Figures generally and specifically with reference to Figures 5 to 7.

BRIEF DESCRIPTION OF FIGURES

Figure 1 is a schematic illustration of a perspective view of a tent-shaped roof structure;
Figure 2 is a schematic illustration of a perspective view of a pyramid-shaped roof structure;
Figure 3 is a schematic illustration of a perspective view of the apex of the tent-shaped roof structure of Figure 1 formed using a stone ridge tile together with cement fixing;
Figure 4 is a schematic illustration of a cross-sectional view of an apex of a roof structure illustration airflow therethrough;
Figure 5 is a schematic illustration of a cross-sectional view of a ridge mounting and ventilation system according to one embodiment of the present invention engaged to an apex of a roof structure;
Figure 6 is a schematic illustration of a view from above of a ridge formed using the ridge mounting and ventilation system of Figure 5; and
Figure 7 is a schematic illustration of a side view of a ridge formed using the ridge mounting and ventilation system of Figure 6.

DETAILED DESCRIPTION

With reference to Figure 5, the roof structure 1 is a tent shaped roof which has two sides 2a, 2b that lean together at the upper horizontal edge called a ridge. The ridge formed between the pair(s) of natural stone slates may form any suitable angle depending on the particular requirements for the roof structure. The ridge formed between the pair(s) of natural stone slates preferably has an angle of about 90 degrees for a tent-shaped structure and an angle of about 120 degrees for a pyramid-shaped structure.
The ridge mounting and ventilation system 10 of the present invention utilises a pair of flat natural stones 12a, 12b in conjunction with a layer of glass-reinforced polyester (GRP) 13 and a mounting system 18 to form a high performance ridge that faithfully emulates a traditionally hewed stone ridge and which can be mechanically fixed to provide ventilation to the apex of an installed roof structure.
The ridge mounting and ventilation system 10 comprises a plurality of pairs of flat natural stones or stone slates 12a, 12b aligned with and positioned adjacent each other along the ridge of the apex of the roof structure. Each pair of flat natural stone slates 12a, 12b is configured to abut one another along one edge thereof to form a ridge. Each natural stone slate has an outer surface 14a, 14b and an opposed inner surface 16a, 16b. A layer of glass-reinforced polyester (GRP) or a preformed liner made from polymer 13 or a similar waterproof material, is adhered or mechanically fixed to the inner surface 16a, 16b of the natural stone slates 12a, 12b.
The glass-reinforced polyester (GRP or similar) 13 provides a continuous waterproof layer extending between each pair of natural stone slates 12a, 12b. The glass-reinforced polyester (GRP) 13 forms a permanent joint extending between each pair of natural stone slates.
Each slate 12a, 12b within each pair of slates further comprises a securement means 20a, 20b configured to receive and adhere to the glass reinforced polyester to form a mechanical join thereto. It is to be understood that although in the illustrated embodiment, each slate provides a single securement means 20a, 20b, each slate may comprise a plurality of securement means in any suitable configuration in order to provide a plurality of mechanical joins between the slate and the layer of glass reinforced polyester (GRP)
The securement means 20a, 20b is provided as a butterfly-shaped recess located adjacent the centre of the slate 12a, 12b. The GRP is applied to the slate and extends into the recess to form a mechanical join of the securement means 20a, 20b.
Each flat natural stone slate 12a, 12b of each pair of flat natural stone slates comprises a first end 22a configured to abut a first end 22b of the other corresponding flat natural stone slate within the pair, and a second opposed free end 24a, 24b.
The system 10 further comprises a spacer 26a, 26b configured to be located at or adjacent the second free end 24a, 24b of the slate 12a, 12b. The spacers 26a, 26b are configured to abut an underlying apex 1 of an installed roof structure and to support the adjacent flat natural stone slate 12a, 12b thereon at a predetermined location spaced apart from the underlying apex. The spacers are configured to provide spacing between the slate and the underlying roof structure to enable air to pass therebetween providing ventilation to the roof structure, especially the apex of the roof structure.
The spacer(s) may have any suitable shape and/or dimensions to provide at least one passageway for air, in which the passageway extends from the cavity provided within the roof structure (preferably at or adjacent the apex) and an external air environment.
In the illustrated embodiment, the spacer has a first free end 28a, 28b located between the glass reinforced polyester or similar 13, and the corresponding surface of the natural stone slate 12a, 12b, and a second opposed free end 30a, 30b configured to contact and abut an underlying apex 1of an installed roof structure.
The first free end 28a, 28b is be adhered to the corresponding surface of the natural stone slate 12a, 12b by a layer of glass reinforced polyester 13.
The second free end 30a, 30b of the spacer 26a, 26b comprises an outwardly extending hooked or folded portion.
The system preferably further comprises a first attachment member 32 configured to extend from the permanent joint 33 formed by glass reinforced polyester (GRP) 13 extending between adjacent natural stone slabs 12a, 12b to engage an adjacent first surface 34 of a ridge runner batten 36. The first attachment member in the illustrated embodiment is a threaded attachment member configured to engage a ridge runner batten 36, for example by way of a threaded connector.
The system further comprises a sealable fixing locater 38 prepositioned at a predetermined location on the permanent joint 33 formed by GRP 13 extending between adjacent natural stone slabs. The sealable fixing locater 38 is configured to receive a first attachment member extending therethrough.
The system further comprises a corrosion resistant mounting bracket 18 configured to be mountable on an apex 1 of a roof frame, and configured to receive, engage and/or support a second surface of a ridge runner batten 36 thereon. The corrosion resistant mounting bracket 18 is composed of corrosion resistant material, such as for example polymer(s).
The corrosion resistant mounting bracket 18 comprises a first end 40 providing a first channel 42 shaped and dimensioned to receive the apex 1 and a second opposed end 44 providing a second channel 46 shaped and dimensioned to receive the batten 36. The first and second channels 42, 46 may have any suitable shape and dimensions. In the illustrated embodiment, the corrosion resistant mounting bracket(s) 18 comprises a first end 40 providing a V-shaped channel 42 configured to be support on the apex 1, and an opposed second end 44 providing a U-shaped channel 46 for receiving a ridge runner batten 36 thereon.
The mounting bracket 18 further comprises second attachment members 48 located adjacent a first channel 42 and configured for engaging the apex 1 of a roof structure.
With reference to Figure 6, the ridge is formed by a plurality of aligned pairs of natural stone slates 12a, 12b, 112a, 112b. Each pair of slates 12a, 12b, 112a, 112b comprises a front surface 50, 150 and opposed rear surface 52, 152 extending between the upper and lower surfaces of the slates 12a, 12b, 112a, 112b. The layer of GRP or similar 13 extends beyond at least one of the front and/or rear surface 50, 150, 52, 152. The extended layer of GRP or similar (beyond the front and/or rear surface of the ridge) is configured to prevent water ingress between adjacent ridges (i.e. between adjacent pairs of natural stone slates).
It can be seen that the extended layer of GRP or similar 13 provides a pair of spaced apart ribs 54a, 54b extending substantially perpendicular to the longitudinal axis of the ridge. The one or more ribs prevent tracking of water underneath the ridges.
The sealable fixing locator 38 is located on the extended layer of GRP.
With reference to Figure 7, the system further comprises alignment members 60 located at or adjacent a front and/or rear surface 50, 150, 52, 152 of the ridge. The alignment members 60 are Z-shaped and configured to engage and secure to an extended layer of GRP or similar 13 of an adjacent ridge, thereby enabling a plurality of ridges formed from a plurality of pairs of natural stone slates to be aligned and secured together to form a water tight ridge along a roof structure.
In use, a flat piece of natural stone is split in a traditional manner to offer a desired natural riven external surface. The stone is then accurately sized into two rectangular mirrored pieces that have a mitred cut along one length and are brought together to form an angular joined piece of stone, also referred to herein as a ridge. The angle of the cut can be varied depending on the requirements of the roof on which the ridge would be installed. Common angles include 90 degrees, 105 degrees and 120 degrees, although the angle can be varied as required.
The two stone slates are inverted and placed into a specific jig and primed so that they can be adhered together using glass reinforced polyester. Spacers 26a, 26b are positioned adjacent the second free ends of the slate. Glass reinforced polyester is extremely strong, resilient and permanently waterproof and can be readily formed into any shape whereby it will set permanently when cured. The GRP is wet laid onto the stone and into the extended sections of the jog to form a permanent join between the slates. A critical bond is formed between the slate, the GRP layer and the GRP retained within the securement means 20a, 20b. By allowing the GRP to flow into the securement means, the GRP is locked onto the slate when cured.
The mounting bracket 18 is positioned on the apex 1 such that the apex 1 is received within the first channel 42. Second attachment members 48 secured the mounting bracket 18 in position relative to the apex. The batten 36 is inserted into the second channel 46 of the mounting bracket 18.
The ridge, formed by the pair of slates 12a, 12b and the GRP 13, is positioned onto the roof structure. The GRP 13 extends beyond the rear 52 of the ridge (see Figure 6). A first attachment member 32 is inserted through the sealable fixing locater 38 to engage the batten 36, for example by way of a threaded connector. A second ridge formed from a pair of slates 112a, 112b is positioned adjacent to the first pair of slates 12a, 12b along the apex of the roof structure. Alignment members 60 ensure the pairs of slates 12a, 12b, 112a, 112b are accurately aligned with each other.
Once in position, spacers 26a, 26b provide an air passageway extending from the roof space of the roof structure, under the slates 12a, 12b of the ridge and into the external environment, thereby providing adequate ventilation of the roof space.
The present invention provides a natural stone ridge configured for mechanical fixation to an apex of a roof structure and as such satisfies planning regulations. Furthermore, the system of the present invention is corrosion resistance and therefore has an enhanced life span compared to conventional systems.
It will be appreciated that variation may be made to the aforementioned embodiments, without departing from the scope of protection, as defined by the claims. For example, a keystone insert or bead may be bonded to the pair of flat natural stone slates, for example along their join, to add mechanical strength and resist relative bending of the pair of flat natural stone slates.

Claims

A ridge mounting and ventilation system comprises: at least a pair of flat natural stone slates (12a, 12b) bonded one to another along their mitred edges (22a, 22b) to define a ridge, characterised in that the ridge overlays a glass-reinforced polyester (GRP) liner (13); and at least one spacer (26a, 26b) is located at or adjacent each lower edge of the slates (12a, 12b) to space the lower edge from a surface on which the slates (12a, 12b) rest to define an opening for ventilating the apex of an installed roof structure.
A ridge mounting and ventilation system as claimed in claim 1, characterised in that the natural stone slates (12a, 12b) have an outer surface (14a, 14b) and an opposed inner surface (16a, 16b) and the glass reinforced polyester liner (13) is adhered to the inner surface (16a, 16b) of each of the natural stone slates (12a, 12b).
A ridge mounting and ventilation system as claimed in claim 2, characterised in that at least one securement means (20a, 20b) formed in or bonded to natural stone slates (12a, 12b) and configured to receive and adhere to the glass reinforced polyester liner (13).
A ridge mounting and ventilation system as claimed in claim 3, characterised in that the at least one securement means (20a, 20b) comprises a recess extending along the inner surface of the natural stone slates (12a, 12b).
A ridge mounting and ventilation system as claimed in any preceding claim, characterised in that a first attachment member (32) is configured to extend from the glass reinforced polyester liner (13) to engage with a ridge runner batten (36).
A ridge mounting and ventilation system as claimed in claim 5, characterised in that a sealable fixing locater (38) is prepositioned at a predetermined location on the glass-reinforced polyester (GRP) liner (13).
A ridge mounting and ventilation system as claimed in claim 5 or 6, characterised in that a corrosion resistant mounting bracket (18) is configured to be mountable on an apex (1) of a roof frame and is configured to receive and support the ridge runner batten (36).
A ridge mounting and ventilation system as claimed in claim 7, characterised in that each of the at least two spacers (26a, 26b) has a first free end (28a, 28b), located between the glass reinforced polyester liner (13), and the corresponding surfaces of the natural stone slates (12a, 12b), and a second opposed free end (30a, 30b) configured to contact and rest on an underlying roof item, such as a tile or slate or stone slab.
A ridge mounting and ventilation system as claimed in claim 8, characterised in that the at least one spacer (26a, 26b) defines a mounting edge extending from the first free end (28a, 28b) towards the second opposed free end (30a, 30b), wherein the mounting edge abuts and supports a lower portion (24a, 24b) of the natural stone slates (12a, 12b), and in which the second opposed free end (30a, 30b) of the at least one spacer (26a, 26b) comprises an outwardly extending portion extending in a direction away from the mounting edge.
A ridge mounting and ventilation system as claimed in claim 9, characterised in that the outwardly extending portion of the at least one spacer (26a, 26b) comprises a curved portion.
A ridge mounting and ventilation system as claimed in any preceding claim, characterised in that the at least one spacer (26a, 26b) is formed from aluminium.
A ridge mounting and ventilation system as claimed in any preceding claim, characterised in that the glass-reinforced polyester liner (13) provides a continuous layer extending between the at least one pair of natural stone slate.
A ridge mounting and ventilation system as claimed in any of claims 7 to 12, characterised in that the at least one corrosion resistant mounting bracket (18) comprises a first end, providing a V-shaped channel (42) configured to be supported on the apex (1) of the roof frame and an opposed second end providing a U-shaped channel (44) for receiving the ridge runner batten (36).
A ridge mounting and ventilation system as claimed in claim 13, characterised in that the bracket (18) further comprises at least one second attachment member (48) located adjacent the first end and extending outwardly from the V-shaped channel (42) and configured for engaging the roof frame (2a, 2b).
A method for producing a ridge mounting and ventilation system comprising the steps of:
adhering a layer of glass reinforced polyester liner (13) to at least one pair of flat natural stone slates (12a, 12b) whose edges are mitred, such that the glass-reinforced polyester liner extends therebetween forming a permanent joint; and

forming or securing a spacer (26a, 26b) to at least one natural stone slate (12a, 12b), in which the spacer (26a, 26b) is configured to support a lower edge of the natural stone slates (12a, 12b) when positioned thereon at a predetermined location spaced apart from an underlying apex of a roof structure.