EP1009893A1 - Procede et appareil de couverture de toit - Google Patents

Procede et appareil de couverture de toit

Info

Publication number
EP1009893A1
EP1009893A1 EP98905097A EP98905097A EP1009893A1 EP 1009893 A1 EP1009893 A1 EP 1009893A1 EP 98905097 A EP98905097 A EP 98905097A EP 98905097 A EP98905097 A EP 98905097A EP 1009893 A1 EP1009893 A1 EP 1009893A1
Authority
EP
European Patent Office
Prior art keywords
hook
roof
loop fastener
shingle
roof covering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98905097A
Other languages
German (de)
English (en)
Inventor
Joseph Graham
Keith Kennedy
Vincent Meyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP1009893A1 publication Critical patent/EP1009893A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/29—Means for connecting or fastening adjacent roofing elements
    • E04D1/2907—Means for connecting or fastening adjacent roofing elements by interfitted sections
    • E04D1/2914—Means for connecting or fastening adjacent roofing elements by interfitted sections having fastening means or anchors at juncture of adjacent roofing elements
    • E04D1/2918—Means for connecting or fastening adjacent roofing elements by interfitted sections having fastening means or anchors at juncture of adjacent roofing elements the fastening means taking hold directly on adjacent elements of succeeding rows
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/141—Fastening means therefor characterised by the location of the fastening means
    • E04D5/143—Fastening means therefor characterised by the location of the fastening means in the field of the flexible material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/144—Mechanical fastening means
    • E04D5/147—Mechanical fastening means not perforating the flexible material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/148—Fastening means therefor fastening by gluing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/26—Strip-shaped roofing elements simulating a repetitive pattern, e.g. appearing as a row of shingles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D2001/005—Roof covering by making use of tiles, slates, shingles, or other small roofing elements the roofing elements having a granulated surface
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E04D2001/3408—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastener type or material
    • E04D2001/3429—Press-studs elements or hook and loop elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
    • E04D2001/3488—Fastenings for attaching roof-covering elements to the supporting elements characterised by the type of roof covering elements being fastened
    • E04D2001/3491—Fastenings for attaching roof-covering elements to the supporting elements characterised by the type of roof covering elements being fastened made of flexible material, e.g. shingles

Definitions

  • the present invention relates to roof covering assemblies and a method for covering a roof. More particularly, the present invention relates to a roof covering which is detachably engaged with the roof deck. Even more particularly, the present invention relates to detachably securing flat and shingle roof coverings to a roof using a hook and loop fastener.
  • Each three-tab shingle is c approximately one foot high by three foot wide, and is twice slotted along its bottom edge to form three tabs along its lower half which, upon assembly with other shingles to form a roof covering, are the only portions of the shingle which remain visible.
  • An asphalt three-tab shingle bears backing sand or other granular materials (e.g., mica) on its back surface and facing granules on its front surface.
  • the granular material on the back surface of the shingle provides weight to the shingle and acts as a blocking material to keep the shingles from sticking together when bundled for shipping and storage.
  • the facing granules may be of any desired color for aesthetic purposes.
  • Another type of asphalt-based shingle is referred to as a laminated shingle, which is constructed and applied to a roof similarly to a three-tab shingle, but v has a multi-ply shingle construction and may not have tabs formed therein.
  • roofs While a structure's roof may serve to block the sun and wind from its interior, the roofs primary purpose is to serve as a moisture barrier.
  • the attachment of the external roof covering can require the use of nails or staples driven through each shingle and the underlying roof deck
  • any moisture barrier provided by the roof deck or the shingle itself is violated by the use of such fasteners
  • building code requirements may dictate that an underlying layer of roofing felt (an asphalt-saturated felt material) be laid over the roof deck (typically a wooden roof deck) prior to application of the shingles
  • roofing felt is required only for the initial few feet of a roof line, or may be required over the entire roof deck
  • roofing felt may serve as an initial moisture barrier below the three-tab asphalt shingles, and specifically adjacent the lower portion of the roof line where ice dams may fonn which can cause water to seep under and upwardly on a roof through the shingles
  • Flat roofing typically uses of ethylene propylene diene monomer (EPDM) or polyvinyl chloride (PVC) sheets or membranes of 10-50 ft (3-15 m) widths
  • EPDM ethylene propylene diene monomer
  • PVC polyvinyl chloride
  • the membrane is laid over the roof surface and the large sheets are spliced and sealed at the seams to create one continuos sheet of impervious (to water) membrane the size of the entire roof
  • a flat roofing membrane must also be firmly attached to the roof because wind blowing across a flat roof causes a lifting force that can actually cause the membrane to balloon, eventually stretching out the membrane to the point of causing failure
  • the membrane is normally attached to the roof in one of three ways to prevent lifting s Rocks have been placed on top of flat roofing membranes to hold down the membrane Rocks are cheap but they are heavy and put additional strain on the roof They can also be difficult to hoist to the top of buildings and can be difficult to obtain in big cities Also, in
  • a roof covering assembly which comprises a first and second complementary part of a hook and loop fastener and a roof covering
  • the first part of the hook and loop fastener is securable onto a portion of a roof deck
  • the roof covering is disposable over the roof deck, and the second complementary part of the hook and loop fastener is secured on a portion of the back surface of the roof covering
  • the roof covering is detachably engagable with the roof deck via the hook and loop fastener after the first part of the hook and loop fastener is secured onto the roof deck
  • the first part of the hook and loop fastener is defined by a hook-engaging material and the second part of the hook and loop fastener is defined by a plurality of outwardly projecting hooking stems formed to releasably engage the hook engaging material upon contact therewith It is desirable for the first part of the hook and loop fastener to be borne by a flexible, water-impervious substrate sheet
  • the roof covering can include a flat roof covering comprising a membrane having the second complementary part of the hook and loop fastener secured on a portion of the back surface thereof, wherein the membrane is detachably engagable with the roof deck via the hook and loop fastener after the first part of the hook and loop fastener is secured onto the roof deck
  • the second complementary part may be a nonwoven material
  • the roof covering can also comprise one or more shingles suitable for being disposed over the roof deck in overlapping courses The back surface of each shingle has the second complementary part of the hook and loop fastener secured on a portion thereof, wherein each of the shingles is detachably engagable with the roof deck via the hook and loop fastener after the first part of the hook and loop fastener is secured onto the roof deck
  • the roof covering may also comprise a combination of a flat roof covering and one or more shingles
  • the roof covering assembly of the present invention can include the roof deck
  • a method for covering a roof deck with a roof covering comprises the steps of affixing a first part of a hook and loop fastener onto the roof deck, aligning a roof covering over the roof deck, the roof covering material having a second complementary part of the hook and loop fastener on a portion of the back surface thereof, and urging the roof covering against the roof deck with force sufficient to detachably engage the first and second parts of the hook and loop fastener together for holding the roof covering onto the roof deck.
  • the affixing step includes covering at least a portion of the roof deck with a layer of water-impervious material
  • the step of aligning comprises aligning the membrane over the roof deck, and the step of urging comprises urging the membrane against the roof deck with force sufficient to detachably engage the first and second parts of the hook and loop fastener together for holding the membrane onto the roof deck
  • the step of aligning comprises aligning a first or more rows of the shingles over the roof deck, and the step of urging comprises urging the shingles against the roof deck with force sufficient to detachably engage the first and second parts of the hook and loop fastener together for holding the shingles onto the roof deck
  • FIGS 1A and IB are isometric partial views of a roof deck showing two stages of its covering with the roof covering assembly of the present invention
  • FIG 2 is a top plan view of a three-tab shingle of the present invention
  • FIG 3 is a bottom plan view of a three-tab shingle of the present invention.
  • FIG 4 is sectional view as taken laterally through a roof deck showing the inventive roof covering assembly in generated form for clarity
  • FIG 5 is an enlarged sectional view showing the opposed parts of the hook and loop fastener in engaged relation
  • FIGS 6A and 6B are isometric partial views of a roof deck showing two stages of its covering with an alternative embodiment of the roof covering assembly of the present invention
  • FIG. 7 is a sectional view taken laterally through a roof deck showing an alternative embodiment of the inventive roof covering assembly in generated form for clarity;
  • FIG. 8 is an enlarged sectional view showing the opposed parts of an alternative hook and loop fastener in engaged relation.
  • roof lines are usually sloped to facilitate water run off.
  • a roof deck 10 is supported above walls 12.
  • the roof deck 10 presents a generally planar sloped surface for supporting a roof covering assembly to provide protection for the structure from the elements.
  • the roof deck 10 may be formed from any suitable construction material, such as concrete, metal or wood.
  • the roof deck 10 is formed from plywood sheets supported by an underlying roof frame or truss structure (not shown).
  • the roof deck 10 has its top surface 14 covered by a first part 16 of a hook and loop fastener structure.
  • the first part 16 is borne by a flexible vapor barrier sheet 18 which is secured to the roof deck. It is desirable for the sheets 18 to be laid edge to edge or slightly overlapping to provide a secure vapor barrier over the entire roof deck 10.
  • a plurality of shingles 20 are laid in overlapping rows or courses over the roof deck 10. The first course of shingles 20 is laid along the lowermost edge of the roof deck 10, and subsequent courses are overlaid on each other as the roof covering is advanced up the roof deck 10.
  • a second complementary part 22 (FIG. 3) of a hook and loop fastener is secured on a back surface of each shingle 20.
  • the second part 22 engages the first part 16 on the roof deck to secure each shingle 20 to the roof deck.
  • the first part 16 of the hook and loop fastener is the loop portion which presents for engagement a surface having multiple exposed fiber loops
  • the second part 22 is desirable for the second part 22 to include a plurality of hooking stems formed and disposed to engage the fiber loops of the loop portion of the first part 16, in typical hook and loop fastener fashion
  • hook and loop fastener means any two-part mechanical fastener which operates on contact or pressure to mechanically engage two components
  • a typical example of a hook and loop fastener using fibers and hooking stems is the Velcro®-type mechanical fastener
  • Other suitable mechanical fastener assemblies will also suffice, as discussed below, so long as they achieve the characteristic of mechanical engageability and separability without damage to the parts being joined and separated, and provide sufficient engagement force
  • each row or course of shingles is formed from a plurality of three-tab shingles
  • FIGS 2 and 3 illustrate a three-tab shingle 20 embodying the present invention
  • Each shingle 20 has a bottom edge 24, a top edge 26 and side edges 28 and 30
  • Each shingle has a head lap or upper header portion 32 and a butt part or lower tab portion 34
  • a pair of slots or cut-outs 36 extend from the bottom edge 24 through the lower tab portion 34 to define three shingle tabs 38
  • Each shingle 20 is formed from an underlying flexible substrate material (typically fiberglass or organic paper) which bears a coating of asphalt on each major surface thereof The asphalt coatings in turn each bear a particle or sand layer embedded thereon
  • a front surface 39 of the shingle 20 is illustrated in FIG 2, and has its entire surface covered with granule, except for a longitudinally extending strip of exposed seal-down asphalt 40 This strip 40 extends generally across the shingle's length, along the juncture of the header and tab portions 32 and 34 After assembly, the only visible portions of the shingle 20 will be the tabs 38
  • the prime granule borne on the front surface 39 of each tab 38 may be any desired color or pattern to achieve a particular appearance for the roof covering
  • each shingle 20 On its back surface 41 (FIG 3), each shingle 20 also has its asphalt layer covered with a granular material (e g , backing sand or mica) Desirably, the only portions of the back surface 41 of the shingle 20 not covered by a granular backing material would be those portions bearing the second part 22 of the hook and loop fastener. In a desired embodiment, a minor section of the upper header portion 32 bears the second parts 22 of the hook and loop fastener. A section of second part 22 is adhered directly to the asphalt layer on the back surface 41 of the shingle adjacent each edge 28 and 30, and above each slot 36.
  • a granular material e g , backing sand or mica
  • FIG. 4 illustrates the orientation of the components during sequential assembly of a roof covering of the present invention.
  • the sheet 18 is adhered to the top surface 14 of the roof deck 10 by suitable means, such as a pressure sensitive adhesive.
  • the sheets 18 are laid edge to edge or slightly overlapping, and the sheet material is a water-impervious material, thereby forming a vapor barrier across the roof deck 10.
  • This material has a polyolefin film backing or substrate with pressure sensitive adhesive on one side, and a warp-knitted polyester fabric bonded on its other side. This relatively thin material is available in roll form (without a liner) and can simply be unrolled and adhered on a roof deck by its pressure sensitive adhesive.
  • a desirable width for the roll material is about 36 inches.
  • the sheet 18 is applied over the entire surface 14 of the roof deck 10, thereby presenting a complete moisture barrier and presenting the first part 16 of the hook and loop fastener for use in securing the shingles 20 thereto.
  • a first course or row of shingles is then laid along the lowermost edge of the roof deck 10.
  • the shingles 20 of that first row are laid so that their bottom edges 24 extend slightly beyond the lowermost edge of the roof deck 10.
  • the second part 22 of the hook and loop fastener (having hooking stems thereon) engages upon contact the first part 16 to secure each shingle 20 to the roof deck 10.
  • each shingle 20 is releasably adhered to the roof deck 10 via the hook and loop fastener structures, the shingles 20 themselves become bonded together via the seal-down asphalt strips 40 As the roof is exposed to a heating history (seasonal elevated temperatures and exposure to the sun), the heat curable asphalt strip 40 softens and "flows" onto the back surface of the shingle tab of the overlying shingle 20, thereby adhering the two overlapping shingles together
  • FIG 5 illustrates in enlarged detail the hook and loop mechanical fastener engagement relationship
  • the first part 16 has a plurality of exposed fiber loops 45, some of which are engaged by the second part 22
  • the second part 22 in turn is formed as a generally planar substrate 50 having a plurality of hooking stems 52 projecting outwardly therefrom It is desirable for the hooking stems 52 to be formed integrally with the substrate 50
  • Each hooking stem 52 includes means for hooking an opposed surface (such as a loop material), which is shown as a head 54 on the end of each hooking stem 52
  • the head 54 may be any suitable shape or configuration to serve as a means to snag one or more of the fiber loops 45 for engagement therewith upon contact
  • the second part 22 to be formed from 3M product SJ3504, available from Mnnesota Mining and Manufacturing Company, Saint Paul, Mrmesota Suitable hooking structures and methods of their fomvation are disclosed in Melbye et al U S Patent No , Chesley U S Patent No 5,505,
  • each shingle has an asphalt coating 56 on a back surface of a shingle substrate 58, and an asphalt coating 60 on a front surface of the shingle substrate 58
  • Sand particles or granules are embedded in the asphalt coatings 56 and 60 on both surfaces of the shingle substrate, backing sand 62 on the back surface and facing granules 64 on the front surface
  • the facing granules 64 on the tabs 38 are prime granules and may include decorative features
  • a roof covering assembly formed according to the present invention provides a durable, water-resistant and inexpensive barrier to the elements Its assembly causes no damage to the roof deck or a moisture barrier layer laid thereon by use of penetrating nails, staples or other such fasteners
  • the present roof covering assembly provides a roof covering of high integrity, convenience and versatility
  • the non-invasive hook and loop fastener has the advantage of radically simplifying the construction process It allows easy repositioning of shingles during assembly if they are misaligned or misplaced This further allows versatility and experimentation during assembly to achieve desired shingle color combinations, patterns or effects Further, the roof covering assembly of the present invention can be assembled relatively quickly and without highly skilled laborers As a result, the workplace is safer and cleaner
  • the degree of adhesion achieved by the hook and loop fastener is a function of many variables Some of these include the density of the hook and loop components, their relative sizes (e g , height of loops and length of hooking stems) and the weight of the shingle itself A low profile hook and loop fastener structure is desired
  • the engaging force can be increased by increasing the relative surface area of the hook and loop fastener (e g , by increasing the size of the second parts 22 on the back surface 41 of each shingle 20) or by other means such as changing densities of the hooking stems or head sizes, etc Higher engaging forces may be desired in climates where high winds are more likely (such as hurricane-prone areas)
  • a further advantage in using a hook and loop fastener structure is that the loop material provides a cushioning layer for the shingles This may enhance the aesthetic appearance of the roof covering by giving it a three-dimensional aspect
  • the hook and loop fastener provides yet a further advantage for the roofing structure by providing some inherent expansion between relative roofing components without undue strain or damage
  • the components of the roofing assembly are formed from different materials (e.g., wood, asphalt, etc.), which will expand and contract at different rates as the temperature changes.
  • the use of a hook and loop fastener allows some give laterally (without sacrificing engagement strength) to facilitate such different thermal expansion rates of materials.
  • the first part of the hook and loop fastener is disposed on the roof deck 10 in longitudinally extending strips 70, rather than covering the entire roof deck 10 with mechanical fastener material.
  • strips 70 could be applied in various ways.
  • the strips 70 having exposed fiber loops on their top side may have pressure sensitive adhesive on a back side and be directly applied to the top surface 14 of the roof deck 10, or onto a roofing felt layer (such as felt sheets 72 in FIG. 6A) applied over some or all of the roof deck 10.
  • one or more strips 70 may be disposed on a larger sheet of water- impervious material which has pressure sensitive adhesive on a back side thereof for covering the entire roof deck with a water-resistant layer.
  • the strips 70 are arranged across the roof deck 14 to align with the second part of the hook and loop fastener on the back surface of the shingles 20, as illustrated in FIG. 6B.
  • FIG. 7 illustrates an embodiment of the roof covering assembly of the present invention wherein each shingle 20 is again secured to the roof deck 10 via opposed hook and loop fastener components 16 and 18, but where overlapping shingles are also connected using opposed hook and loop fastener components.
  • the seal-down asphalt strip 40 on the front surface of the shingle 20 is replaced with opposed complementary hook and loop fastener parts 116 and 122 borne on the shingles 20.
  • the first part 116 (having exposed fiber loops) is on the front surface of the shingle 20, and the second part 122 (having the hooking stems) is on the back surface, adjacent the bottom edge 24.
  • the first row of shingles 20 have a second part 123 adjacent their bottom edges 24 which engages the first part 16 on the roof deck 10.
  • This type of mounting arrangement provides the advantage of immediate securement of the tabs 38 of each shingle 20 to the underlying structure. There is no need to wait for the sun to heat and soften an asphalt bonding strip in this embodiment— the assembly is immediately resistant to high winds and adverse weather conditions without waiting for any heat exposure, bonding and curing of a seal-down asphalt adhesive
  • FIG 8 illustrates a two-part, hermaphroditic, mushroom-shaped head mechanical fastener wherein the opposed fastener parts are formed and mated to engage upon pressurized contact
  • the roof deck 10 may have a water-impervious layer 80 adhered to its top surface 14, with one part 82 of the mechanical fastener adhered thereto by an adhesive or other suitable means (or formed integrally with the water-impervious layer)
  • the other part 84 of the mechanical fastener is bonded to the shingle substrate 58 by an asphalt layer 56
  • the proposed mechanical fastener parts 82 and 84 have identical profiles in this example On each part, a plurality of stems 86 are formed, each with a mushroom-shaped head 83.
  • the heads 83 have bottom edges which, when
  • FIG 8 illustrates but one example of such opposed mechanical fasteners
  • Other examples are known by commercial names such as "Scotchmate” and “Dual Lock,” both available from Minnesota Mining and Manufacturing Company, Saint Paul, Minnesota
  • Velcro®-type mechanical fastener is that engagement is not effective until some pressure is applied between opposing fastener parts
  • the shingles can be laid out on the roof deck, and then realigned and moved without having to disengage the fasteners.
  • the second part of the hook and loop fastener may be secured to the shingle by an asphalt coating or by some other form of bonding (e.g., ultrasonic welding) or some other suitable adhesive, whether thermally- activated or pressure sensitive or other.
  • the water-impervious layer disposed on the roof deck may itself comprise a coating or may be a discrete sheet adhered by means of a layer of pressure sensitive adhesive, so long as it is adhered to the roof deck to sufficiently prevent its separation during high winds.
  • a conventional EPDM roofing sheet with a nonwoven fleece like material partially embedded in the underside thereof, can be secured with a hook and loop fastener.
  • One such EPDM roofing sheet is manufactured by Carlisle SynTec Incorporated, of Carlisle, Pennsylvania, 17013, under the product designation "FleeceBACK" 100.
  • FleeceBACK 100 Membrane incorporates a .045 inch (1 mm) or .060 inch (1.5 mm) thick Sure-Seal® (black) or .060 inch (1.5 mm) thick Brite-PlyTM (white-on- black) non-reinforced EPDM membrane laminated to a .055 inch (1.4 mm) thick non-woven polyester fleece-backing.
  • FleeceBACK 100 Membrane is available in widths of 10 feet (3 mm) and lengths of 50 feet (15.2 m).
  • the nonwoven materials are typically used to enhance the bond between the adhesive and the roofing membrane by providing mechanical bonding. This layer of nonwoven material also increases the stretch resistance of the roofing membrane.
  • the nonwoven fleece functions as the loop portion of the hook and loop fastener.
  • the hook portion was a fabric cube gripping hook tape, with a high temperature pressure sensitive adhesive (PSA), manufacture by Minnesota Mining and Manufacturing Company under the product No. #956.
  • PSA high temperature pressure sensitive adhesive
  • Other suitable hooking structures and methods of their formation may be found in the references incorporated by reference above (e.g., U.S. Patent No.
  • This hook tape was bonded to a foam insulation board by the PSA.
  • the EPDM sheet was laid over the hook covered foam board so that the hooks engaged into the nonwoven backside. It was observed that this attachment exhibited a high Shear strength in the range of about 15psi to about 20psi with moderate peel strength of at least about 0.75 lbs/in width. It is desirable for the attachment shear strength to be at least about 10 psi and the attachment peel strength to be at least about 0.5 lbs/in. width. It was also observed that as movement between the sheet and the insulation board increased, the performance of the hook and loop engagement kept improving.
  • a loop fabric material for example the woven loop material manufactured by 3M Company, Style No. SJ 3401, is substituted for the nonwoven fleece and embedded or adhered to the EPDM roofing sheet of the previous embodiment.
  • These loop materials can be designed in conjunction with the hooks, according to techniques in the art, to increase or decrease the shear and peel performance of the attachment as desired.
  • Advantages of using a hook and loop fastening system, such as that disclosed above, to attach shingle and/or flat roof coverings to a roof can include: the elimination of VOCs; no need for curing or messy adhesives; no need to form holes through the roof covering; can be mounted to cover whatever area of the flat roofing membrane is desired to reduce the chances of ballooning; allows for easy engagement of the roof covering to the roof; and allows the roof covering to be cleanly removed for replacement.
  • a self mating fastening system provides the additional advantages of: allowing for easier alignment and adjustability of the roof covering before engagement to the roof; and produces a positive locking feel and sound which provide a notification that the mating surfaces are engaged.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

L'invention concerne un procédé et un appareil servant à fixer des éléments de couverture de toits extérieurs (p. ex. des membranes plates de couverture, des bardeaux, etc.) sur un support d'étanchéité à l'aide d'éléments de fixation mécaniques, telles des structures de fixation de type velcro. Une partie (16) d'un élément de fixation plat de type velcro est fixée au support d'étanchéité, de préférence sur un côté d'une feuille (18) imperméable à l'eau comportant de l'autre côté un adhésif autocollant. L'adhésif autocollant est employé pour fixer la feuille au support porteur (10). Des éléments de membrane plate de couverture ou de bardeaux (20) individuels pourvus de la deuxième partie (22) complémentaire de l'élément de fixation, située sur une surface postérieure de ceux-ci, sont placés pour entrer en contact avec la première partie de l'élément de fixation de type velcro située sur le support d'étanchéité.
EP98905097A 1997-02-18 1998-02-17 Procede et appareil de couverture de toit Withdrawn EP1009893A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US801535 1985-11-27
US80153597A 1997-02-18 1997-02-18
PCT/US1998/002943 WO1998036139A1 (fr) 1997-02-18 1998-02-17 Procede et appareil de couverture de toit

Publications (1)

Publication Number Publication Date
EP1009893A1 true EP1009893A1 (fr) 2000-06-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98905097A Withdrawn EP1009893A1 (fr) 1997-02-18 1998-02-17 Procede et appareil de couverture de toit

Country Status (4)

Country Link
EP (1) EP1009893A1 (fr)
AU (1) AU6279898A (fr)
CA (1) CA2283857A1 (fr)
WO (1) WO1998036139A1 (fr)

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CA2283857A1 (fr) 1998-08-20
AU6279898A (en) 1998-09-08
WO1998036139A1 (fr) 1998-08-20

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