US20080289290A1 - Roofing System for Buildings - Google Patents

Roofing System for Buildings Download PDF

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Publication number
US20080289290A1
US20080289290A1 US11/631,841 US63184105A US2008289290A1 US 20080289290 A1 US20080289290 A1 US 20080289290A1 US 63184105 A US63184105 A US 63184105A US 2008289290 A1 US2008289290 A1 US 2008289290A1
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United States
Prior art keywords
roofing system
rafter
tile
keying
unit
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Abandoned
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US11/631,841
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Rodney Alan Pitman
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/40—Slabs or sheets locally modified for auxiliary purposes, e.g. for resting on walls, for serving as guttering; Elements for particular purposes, e.g. ridge elements, specially designed for use in conjunction with slabs or sheets
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
    • E04D3/351—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation at least one of the layers being composed of insulating material, e.g. fibre or foam material
    • E04D3/352—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation at least one of the layers being composed of insulating material, e.g. fibre or foam material at least one insulating layer being located between non-insulating layers, e.g. double skin slabs or sheets
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
    • E04D3/358—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation with at least one of the layers being offset with respect to another layer
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/36—Connecting; Fastening
    • E04D3/366—Connecting; Fastening by closing the space between the slabs or sheets by gutters, bulges, or bridging elements, e.g. strips

Definitions

  • This invention relates to a roofing system for buildings with shallow sloped roof, or a single or double pitched roof.
  • the present invention is a roofing system for buildings including a plurality of rafters to extend between two supporting locations and spaced apart across an area to be roofed, each rafter having an upper surface adapted with keying formations and two longitudinal sides from the bottom of each of which a lateral ledge extends, a plurality of infil units to be positioned, one unit between each two adjacent rafters, each unit being formed from an insulated panel of similar depth to the depth of a rafter and a support layer secured together, the support layer extending between and seating across adjacent ledges, and a tile to overlie each unit and to lap partially over each of the two adjacent rafters whereat it is secured by a keying element engaging in a keying formation on the corresponding rafter.
  • each elongate cover beneficially has a depending key to lock with its respective keying formation on a rafter.
  • Each cover desirably has outer seals along its longitudinal edges to flexibly seal against the surface of the tiles.
  • the insulating panel of the unit is a plastic material, for example polyisocyranurate (PIR), or similar fire retardant foam, and the support layer is of foamed PVC sheet, bonded to the insulating panel.
  • PIR polyisocyranurate
  • the support layer is of foamed PVC sheet, bonded to the insulating panel.
  • the tile is made from foamed Poly vinyl chloride (PVC) sheet, extruded or thermoformed.
  • PVC Poly vinyl chloride
  • it has an outer layer of unfoamed PVC with a further outer layer of Acrylic Alloy, (PMMA or equivalent) having weather resistance and colour retention properties.
  • PMMA Acrylic Alloy
  • the PIR and PVC plastic material are both desirably fire resistant.
  • Each rafter is preferably of plastics material of substantially inverted T shape, the stem being of multi-walled construction, the walls being connected at their upper ends and the cross-piece on each side of the stem serving as the lateral ledges.
  • the keying formations on the upper surface of each rafter desirably are formed of three grooves parallel to the longitudinal sides. Each groove may have similar integral locking teeth on opposite walls.
  • the upper surface is preferably coated with a soft PVC.
  • the voids between the walls are filled with PIR, or material with a similar honeycombed structure.
  • FIG. 1 is a perspective view of a portion of a roofing system according to the present invention
  • FIG. 2 is an exploded cross-sectional view of the system
  • FIG. 3 is a enlarged cross-sectional detail of an upper surface of a rafter with a cover above and;
  • FIG. 4 is an end view of a ridge assembly
  • a roofing system for buildings includes a plurality of rafters 10 to extend between two supporting locations, i.e. a ridge and an eave, and spaced apart across an area to be roofed, for example that area defined between two gables.
  • Each rafter 10 has two longitudinal sides 11 from each of which a lower lateral ledge 12 extends.
  • a plurality of infil units 14 are provided to be positioned one unit 14 between each two adjacent rafters 10 .
  • Each unit 14 is formed from a rectangular block forming an insulated panel 18 of similar depth to the depth of a rafter 10 and a rectangular sheet forming a support layer 20 secured together.
  • the layer 20 extends between and seats across two adjacent ledges 12 .
  • a tile 16 is provided to overlie each unit 14 and to lap partially over each of the two adjacent rafters 10 whereat it is secured by a keying element 23 engaging in a keying formation on the corresponding rafter 10 .
  • Each tile 16 is provided with apertures adjacent to each lateral side through which the elements 23 pass, The apertures are slots to allow for expansion.
  • the joint between the edges of adjacent tiles 16 partially overlapping a rafter 10 are protected by an elongate cover 24 secured into a keying formation on said rafter 10 .
  • Each elongate cover 24 has a depending key to lock with its respective keying formation on a rafter 10 .
  • Each cover 24 has outer seals 24 A along its longitudinal edges to flexibly seal against the surface of the tiles 16 .
  • Each tile 16 and support layer 20 is of plastics material, the tile 16 being of cellular or foamed rigid poly-vinyl-chloride (PVC) and coated on its outer side with a skin of unfoamed PVC, and an Acrylic compound (PMMA or equivalent) or other polymer having suitable characteristics together with having weathering resistance and colour retention characteristics, and the layer 20 has fire retardant characteristics.
  • the panel 18 is also of plastics material, for example of Polyisocyranurate (PIR) or other cellular insulating polymer. The panel 18 is bonded to the layer 20 , the bonding being a natural characteristic of the foamed material.
  • PIR and PVC materials are fire retardant.
  • Each rafter 10 is of plastics material of substantial inverted T shape, the stem 10 A being of multi-walled construction, the walls being connected at 10 B at their upper ends with the voids therebetween being filled with PIR and the cross-piece 10 C on each side of the stem 10 A serving as the lateral ledges 12 .
  • each rafter 10 The keying formations 26 on the upper surface of each rafter 10 are formed of three grooves 28 parallel to the longitudinal sides. Each groove 28 has similar integral locking teeth on opposite walls.
  • the upper surface is coated with a soft PVC.
  • the voids between the walls are filled with PIR, or material with a similar honeycombed structure.
  • Associated components for use with the system comprise:—
  • the rafter 10 may alternatively be of folded galvanised sheet metal, the centre of which is filed with PIR.
  • a roof is formed using the roofing system as above described in positioning the rafters 10 , locating the units 14 thereon and using the associated components as required to complete a roof.
  • the roofing system can accommodate dormer window arrangements with gullies formed of thermoformed PVC sheeting.
  • the invention has resulted from the development of the concept of approaching the roofing of domestic housing by “unitising” and including all the necessary insulation required to meet the most up to date EU specifications, both heat retention and air tightness. Tolerance allowances are made for the expansion of the components in situ.
  • the length of each unit will either be two metre or the full pitch length of the roof to be covered.
  • the rafters 10 are designed to take the weight of the units 14 with built in allowances for expansion and the possible weight of snow, ice or solar panels.
  • the supporting locations may be the apex of the rafters of a hip part of a roof.
  • the outer layer may be profiled to a required design.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Building Environments (AREA)

Abstract

A roofing system for buildings includes a plurality of rafters spaced apart across an area to be roofed, each having an upper surface adapted with keying formations and two longitudinal sides from the bottom of each of which a lateral ledge extends. A plurality of infil units are positioned, one between each two adjacent rafters. Each unit is formed from an insulated panel of similar depth to the depth of a rafter and a support layer secured together.

Description

  • This invention relates to a roofing system for buildings with shallow sloped roof, or a single or double pitched roof.
  • Accordingly, the present invention is a roofing system for buildings including a plurality of rafters to extend between two supporting locations and spaced apart across an area to be roofed, each rafter having an upper surface adapted with keying formations and two longitudinal sides from the bottom of each of which a lateral ledge extends, a plurality of infil units to be positioned, one unit between each two adjacent rafters, each unit being formed from an insulated panel of similar depth to the depth of a rafter and a support layer secured together, the support layer extending between and seating across adjacent ledges, and a tile to overlie each unit and to lap partially over each of the two adjacent rafters whereat it is secured by a keying element engaging in a keying formation on the corresponding rafter.
  • Preferably, the joint between the edges of adjacent tiles partially overlapping a rafter are protected by an elongate cover secured into a keying formation on said rafter. Each elongate cover beneficially has a depending key to lock with its respective keying formation on a rafter. Each cover desirably has outer seals along its longitudinal edges to flexibly seal against the surface of the tiles.
  • Preferably also, the insulating panel of the unit is a plastic material, for example polyisocyranurate (PIR), or similar fire retardant foam, and the support layer is of foamed PVC sheet, bonded to the insulating panel.
  • Preferably further, the tile is made from foamed Poly vinyl chloride (PVC) sheet, extruded or thermoformed. Beneficially, it has an outer layer of unfoamed PVC with a further outer layer of Acrylic Alloy, (PMMA or equivalent) having weather resistance and colour retention properties. The PIR and PVC plastic material are both desirably fire resistant.
  • Each rafter is preferably of plastics material of substantially inverted T shape, the stem being of multi-walled construction, the walls being connected at their upper ends and the cross-piece on each side of the stem serving as the lateral ledges. The keying formations on the upper surface of each rafter desirably are formed of three grooves parallel to the longitudinal sides. Each groove may have similar integral locking teeth on opposite walls. The upper surface is preferably coated with a soft PVC. The voids between the walls are filled with PIR, or material with a similar honeycombed structure.
  • An embodiment of the present invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
  • FIG. 1 is a perspective view of a portion of a roofing system according to the present invention;
  • FIG. 2 is an exploded cross-sectional view of the system;
  • FIG. 3 is a enlarged cross-sectional detail of an upper surface of a rafter with a cover above and;
  • FIG. 4 is an end view of a ridge assembly;
    •
  • Referring to the drawings, a roofing system for buildings includes a plurality of rafters 10 to extend between two supporting locations, i.e. a ridge and an eave, and spaced apart across an area to be roofed, for example that area defined between two gables. Each rafter 10 has two longitudinal sides 11 from each of which a lower lateral ledge 12 extends. A plurality of infil units 14 are provided to be positioned one unit 14 between each two adjacent rafters 10. Each unit 14 is formed from a rectangular block forming an insulated panel 18 of similar depth to the depth of a rafter 10 and a rectangular sheet forming a support layer 20 secured together. The layer 20 extends between and seats across two adjacent ledges 12.
  • A tile 16 is provided to overlie each unit 14 and to lap partially over each of the two adjacent rafters 10 whereat it is secured by a keying element 23 engaging in a keying formation on the corresponding rafter 10. Each tile 16 is provided with apertures adjacent to each lateral side through which the elements 23 pass, The apertures are slots to allow for expansion. The joint between the edges of adjacent tiles 16 partially overlapping a rafter 10 are protected by an elongate cover 24 secured into a keying formation on said rafter 10. Each elongate cover 24 has a depending key to lock with its respective keying formation on a rafter 10. Each cover 24 has outer seals 24A along its longitudinal edges to flexibly seal against the surface of the tiles 16.
  • Each tile 16 and support layer 20 is of plastics material, the tile 16 being of cellular or foamed rigid poly-vinyl-chloride (PVC) and coated on its outer side with a skin of unfoamed PVC, and an Acrylic compound (PMMA or equivalent) or other polymer having suitable characteristics together with having weathering resistance and colour retention characteristics, and the layer 20 has fire retardant characteristics. The panel 18 is also of plastics material, for example of Polyisocyranurate (PIR) or other cellular insulating polymer. The panel 18 is bonded to the layer 20, the bonding being a natural characteristic of the foamed material. The PIR and PVC materials are fire retardant.
  • Each rafter 10 is of plastics material of substantial inverted T shape, the stem 10A being of multi-walled construction, the walls being connected at 10B at their upper ends with the voids therebetween being filled with PIR and the cross-piece 10C on each side of the stem 10A serving as the lateral ledges 12.
  • The keying formations 26 on the upper surface of each rafter 10 are formed of three grooves 28 parallel to the longitudinal sides. Each groove 28 has similar integral locking teeth on opposite walls. The upper surface is coated with a soft PVC. The voids between the walls are filled with PIR, or material with a similar honeycombed structure.
  • Associated components for use with the system comprise:—
      • 1. ridge covers as shown in FIG. 4 made from extended foamed PVC coated on its outer side with a skin of PVC and Acrylic compound having weathering resistance and colour retention characteristics, length cut to suit ridge, in conjunction with an extended PVC inner ridge connector having fire retardant characteristics fixed to the rafter ledges of a complementary length. When in situ the outer and inner ridge parts are locked together enclosing the rafter 10, tile 16 and unit 14. Vent profiles can be incorporated into the ridge cover and ridge connection during thermoforming. This latter in conjunction with the eaves facia board extrusion holds the whole roof construction in its skeleton form before the units 14 are slotted into place between the rafters 10 and the tiles with associated jointing covers are locked in place;
      • 2. eaves facia board, in extruded PVC, is designed to support the units 14 at the eaves, with pinning facilities to avoid upward suction caused by wind movements; air seal and a standard facia board to allow the attachment of guttering. While the rafter 10 is pinned to the eaves facia board so also is the unit. The facia profile itself is pinned to the appropriate part of the building to absorb downward loading;
      • 3. gable end assembly in extruded PVC, designed to allow the edges of the units 14 to be housed in appropriate weather-tight recesses, with a suitable junction moulding at the apex; it is fixed to the gable end of the building wall structure;
      • 4. end wall abutment, in extruded PVC, to allow adequate sealing between the units 14 and an end wall. The end wall abutment is sealed to the wall and the unit slides into an appropriate weather-tight recess;
      • 5. Thermoformed gullies.
      • 6. End pieces are provided to close off the extruded components otherwise open.
  • The rafter 10 may alternatively be of folded galvanised sheet metal, the centre of which is filed with PIR.
  • In use, a roof is formed using the roofing system as above described in positioning the rafters 10, locating the units 14 thereon and using the associated components as required to complete a roof. The roofing system can accommodate dormer window arrangements with gullies formed of thermoformed PVC sheeting.
  • The invention has resulted from the development of the concept of approaching the roofing of domestic housing by “unitising” and including all the necessary insulation required to meet the most up to date EU specifications, both heat retention and air tightness. Tolerance allowances are made for the expansion of the components in situ. The length of each unit will either be two metre or the full pitch length of the roof to be covered. The rafters 10 are designed to take the weight of the units 14 with built in allowances for expansion and the possible weight of snow, ice or solar panels. The supporting locations may be the apex of the rafters of a hip part of a roof.
  • The outer layer may be profiled to a required design.
  • Variations and modifications can be made without departing from the scope of the invention described above.

Claims (15)

1-15. (canceled)
16. A roofing system for buildings comprising a plurality of rafters to extend between two supporting locations and spaced apart across an area to be roofed, each rafter having an upper surface adapted with keying formations and two longitudinal sides from the bottom of each of which a lateral ledge extends, a plurality of infil units to be positioned, one unit between each two adjacent rafters, each unit being formed from an insulated panel of similar depth to the depth of a rafter and a support layer secured together, the support layer extending between and seating across adjacent ledges, and a tile to overlie each unit and to lap partially over each of the two adjacent rafters, and keying elements engaging and securing the tile to keying formation on the corresponding rafter, the keying formations on the upper surface of each rafter being formed of three grooves parallel to the longitudinal sides.
17. A roofing system according to claim 16, further comprising an elongate cover secured into a keying formation on said rafter, the elongated cover overlapping and protecting the joint between the edges of adjacent tiles partially overlapping a rafter.
18. A roofing system according to claim 17, wherein each elongate cover comprises a depending key adapted to lock with its respective keying formation on a rafter.
19. A roofing system according to claim 17, wherein each cover comprises outer seals along its longitudinal edges to flexibly seal against the surface of the tiles.
20. A roofing system according to claim 18, wherein each cover comprises outer seals along its longitudinal edges to flexibly seal against the surface of the tiles.
21. A roofing system according to claim 16, wherein the insulating panel of the unit is a plastic material and the support layer is of foamed plastic material bonded to the insulating panel.
22. A roofing system according to claim 21, wherein the plastics material is Polyisocyranurate (PIR).
23. A roofing system according to claim 16, wherein the tile is made from foamed Polyvinylchloride (PVC) sheet, extruded or thermoformed.
24. A roofing system according to claim 23, wherein the tile has an outer layer of unfoamed PVC with a further outer layer of Acrylic Alloy, (PMMA or equivalent) having weather resistance and colour retention properties.
25. A roofing system according to claim 24, wherein the plastic material of the insulating panel, the support layer and the tile are fire resistant.
26. A roofing system according to claim 16, wherein each rafter is an elongated member of plastics material of substantially inverted T shape, the stem being of multi-walled construction with the walls being connected at their upper ends and the cross-piece on both sides of the stem serving as the lateral ledges.
27. A roofing system according to claim 26, wherein each groove has similar integral locking teeth on opposite walls.
28. A roofing system according to claim 27, wherein said upper surface is coated with a soft PVC.
29. A roofing system according to claim 26, wherein voids between the walls are filled with PIR, or material with a similar honeycombed structure.
US11/631,841 2004-07-08 2005-07-08 Roofing System for Buildings Abandoned US20080289290A1 (en)

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GB0415331.8 2004-07-08
GBGB0415331.8A GB0415331D0 (en) 2004-07-08 2004-07-08 Roofing system for buildings
PCT/GB2005/002685 WO2006005921A1 (en) 2004-07-08 2005-07-08 Roofing system for buildings

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EP (1) EP1825073A1 (en)
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US20130219812A1 (en) * 2012-02-24 2013-08-29 Georgia Tech Research Corporation Solar panel roof-ridge mounting systems and methods
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DE102019206752A1 (en) * 2019-05-09 2020-11-12 Dürr Systems Ag Housing and modular kit

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EP1825073A1 (en) 2007-08-29
WO2006005921A1 (en) 2006-01-19

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