US20040200183A1 - Exterior building cladding having rigid foam layer with drain channels - Google Patents

Exterior building cladding having rigid foam layer with drain channels Download PDF

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Publication number
US20040200183A1
US20040200183A1 US10/411,305 US41130503A US2004200183A1 US 20040200183 A1 US20040200183 A1 US 20040200183A1 US 41130503 A US41130503 A US 41130503A US 2004200183 A1 US2004200183 A1 US 2004200183A1
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construction according
wall construction
exterior
plastic
rigid
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Abandoned
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US10/411,305
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Herbert Schilger
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Individual
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Individual
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Priority to US10/411,305 priority Critical patent/US20040200183A1/en
Priority to US10/802,724 priority patent/US6886301B2/en
Priority to CA002461501A priority patent/CA2461501A1/en
Publication of US20040200183A1 publication Critical patent/US20040200183A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/20—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics
    • E04C2/205—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics of foamed plastics, or of plastics and foamed plastics, optionally reinforced

Definitions

  • This invention relates to building construction and more particularly to a building wall construction having an interior frame work and exterior cladding.
  • the frame is typically made of wood or steel and frames made of steel studs and beams are now becoming more commonplace even for home construction. It is also commonplace to use metal connectors for connecting the exterior wall cladding to the frame and these may be in the form of screws, bolts, clips, protruding lugs, etc. Particularly when a steel frame is used, when there is a difference between exterior and interior temperatures, there tends to be condensation and subsequent corrosion along the connector from the cold exterior cladding to the warm interior wall cavity of the building. Even when rigid thermal insulation is used between the exterior cladding and the structural frame, this problem of condensation and corrosion may continue through the insulation along the structural connector.
  • the present invention in its broadest aspect relates to a building wall construction
  • a building wall construction comprising an interior frame formed of a plurality of laterally spaced studs or beams, a layer of rigid insulation adjacent the exterior side of the frame and an interior wall connected to the interior side of the frame with the rigid insulation layer and interior wall forming a wall cavity therebetween, vertical channels formed in the rigid insulation layer adjacent the interior side thereof for collecting and removing moisture from the wall cavity and vertical channels formed in the rigid insulation adjacent the exterior side thereof for collecting and removing rain water.
  • An exterior building cladding is provided adjacent the exterior side of the rigid insulation and a plurality of non-thermal conducting (insulating) plastic connectors extend through the layer of rigid insulation and connect the exterior cladding to the interior frame.
  • the frame is typically made with wood or metal studs, e.g. galvanized sheet steel channels.
  • the rigid insulation is typically made of plastic foam, e.g. polystyrene foam.
  • the exterior wall cladding may be any of the exterior wall claddings that are traditionally used. These may include, for example, brick veneer, wood siding, aluminum siding, vinyl siding, stucco, concrete, glass, metals, etc.
  • the non-thermal conducting (insulating) plastic connectors can be made from a variety of plastic materials having high strength and an ability to withstand high variations in temperature. High strength polyolefins, such as polyethylene or polypropylene are particularly useful.
  • the connectors are typically made of plastic material having a form of relatively thin bands. The material may be either flexible or rigid.
  • the plastic connector In passing through the rigid insulation layer, the plastic connector should fit snugly within an opening in the rigid insulation through which it passes. This can conveniently be accomplished by providing the connector with a sharpened tip which can simply be pushed through the insulation, creating its own opening.
  • each plastic connector can be connected to a frame component by a variety of means and can be very simply connected by means of screws.
  • the outer end of each plastic connector may be connected to the building cladding in a number of different ways which will be described hereinafter.
  • FIG. 1 is an isometric view of a wall construction according to the invention
  • FIG. 2 is a sectional elevation of a wall construction according to the invention.
  • FIG. 3 is a horizontal section through a rigid foam panel of the invention
  • FIG. 4 is an elevation view of a valid form panel
  • FIG. 5 is an elevation showing a detail of connector slot in the rigid form panel
  • FIG. 6 is a perspective view of a plastic connector for brick facing
  • FIG. 7 is a perspective view of a plastic connector passing through a foam panel
  • FIG. 8 is a perspective view of a plastic connector for stucco lath.
  • FIG. 9 is a perspective view of a general purpose plastic connector.
  • this construction includes an interior framework formed of steel studs 10 .
  • Each stud has an inner flange 11 , an outer flange 12 and a central web 13 .
  • Floor beams 14 intersect the wall frame portions.
  • a standard wall paneling 15 is connected to inner flanges 11 of studs 10 and panels of rigid foam insulation 16 are placed adjacent the outer face of the outer flange 12 of studs 10 .
  • the inner wall panels and the foam panels form therebetween the wall cavity 17 is fill with commercial insulation, e.g. glass fiber batts.
  • the rigid foam panels 16 are connected to the studs 10 by way of plastic connectors 20 one type of which can be seen in FIG. 1.
  • plastic connectors 20 one type of which can be seen in FIG. 1.
  • a metal mesh stucco lath 23 is applied over the rigid foam panels 16 and over the lath is applied an exterior stucco coating 24 .
  • the wall structures are horizontally separated at each floor level of a structure as can be seen in FIG. 2.
  • a downwardly sloping metal flashing 25 is installed between the two sections for draining away any water.
  • FIGS. 3, 4 and 5 Details of the rigid foam panels 16 can better be seen from FIGS. 3, 4 and 5 and these are preferably formed from panels having a thickness of about 2 inches.
  • Vertical channels 21 are formed in the foam panels adjacent both the interior and exterior sides of the rigid foam panels 16 and connect to the exterior by way of thin channels 22 .
  • the vertical channels in the exterior face of the rigid foam panels provides a rain screen at the interface between the stucco and the rigid insulation. Exterior water penetration drains to the bottom of the channel and exists via a drain wick 28 and flashing 25 .
  • Vapour that may collect in the wall cavity is vented by way of the channels on the inside face of the rigid insulation panels. This vaporizes up through the channels and exits through the vents 26 as well as through weep holes 27 .
  • the solid insulation panels also have grooves or slots 30 cut into the edge faces to allow a positive connection all around each panel by means of plastic splines inserted between the panels.
  • plastic splines may also be made from a polyolefin plastic such as polyethylene or polypropylene.
  • the plastic splines when inserted in the slots 30 form a rigid lateral support between the studs. As part of this lateral strengthening, screws may extend through the splines and into the studs.
  • FIGS. 6 to 9 Details of some forms of plastic connectors can be seen in FIGS. 6 to 9 .
  • the plastic connector 36 of FIG. 6 is in the form of a wedge with a sharp tip 37 for penetrating a foam panel 16 .
  • the connector 36 has holes 40 for connecting to interior studs and an inner hole 38 containing a steel loop 39 which becomes embedded in a mortar joint between bricks thereby locking a brick outer shell to the frame.
  • the gauge shows a further form of elastic connector strip used for connecting stucco lath mesh.
  • This strip 42 has a sharp point 44 , connector holes 40 and a loop portion 43 which loops around and holds the stucco lath mesh.
  • the connector of FIG. 9 can be used for a variety of purposes having a perpendicular end flange 35 . This is the flange shown in use in FIG. 1.
  • the wall construction of this invention can be used with any exterior building cladding, including brick, stucco or siding, e.g. wood, metal or vinyl siding.
  • exterior building cladding including brick, stucco or siding, e.g. wood, metal or vinyl siding.
  • vertical furring strip are typically used which are attached, e.g. by screws, to horizontal plastic splines 31 inserted between the rigid foam insulation panels.

Abstract

A novel building construction is described for exterior building walls. The construction comprises an interior frame formed of a plurality of laterally spaced studs or beams, a layer of rigid insulation adjacent to the exterior side of this steel frame, exterior building cladding adjacent the exterior side of the rigid insulation and a plurality of non-thermal conducting plastic connectors extending through the layer of rigid insulation and connecting together the exterior cladding and the interior steel studs or beams. Vertical channels are formed adjacent both the inside and outside faces of the insulation layer to remove moisture. This provides the required structural strength with a minimum of thermal conductivity from the warm side to the cold side of the building envelope, while providing exterior drain channels and interior moisture removing channels.

Description

    BACKGROUND OF THE INVENTION
  • This invention relates to building construction and more particularly to a building wall construction having an interior frame work and exterior cladding. [0001]
  • Particularly in colder climates, it has been a common building technique for many years to construct an interior support frame, with an exterior wall cladding or shell fixed to the exterior side of the frame and an interior wall fixed to the interior side of the frame. Many different materials have been used for the exterior wall cladding, including brick veneer, aluminum siding, vinyl siding, wood siding, stucco, concrete, glass, metal, etc. Such constructions may be made with or without insulating materials. [0002]
  • The frame is typically made of wood or steel and frames made of steel studs and beams are now becoming more commonplace even for home construction. It is also commonplace to use metal connectors for connecting the exterior wall cladding to the frame and these may be in the form of screws, bolts, clips, protruding lugs, etc. Particularly when a steel frame is used, when there is a difference between exterior and interior temperatures, there tends to be condensation and subsequent corrosion along the connector from the cold exterior cladding to the warm interior wall cavity of the building. Even when rigid thermal insulation is used between the exterior cladding and the structural frame, this problem of condensation and corrosion may continue through the insulation along the structural connector. [0003]
  • It is an object of the present invention to provide a thermally non-conducting connection between the exterior cladding and the interior frame of the building wall to thereby break the bridge between the different temperature areas and also to remove any interior condensation and collected rain water. [0004]
    • SUMMARY OF THE INVENTION
  • The present invention in its broadest aspect relates to a building wall construction comprising an interior frame formed of a plurality of laterally spaced studs or beams, a layer of rigid insulation adjacent the exterior side of the frame and an interior wall connected to the interior side of the frame with the rigid insulation layer and interior wall forming a wall cavity therebetween, vertical channels formed in the rigid insulation layer adjacent the interior side thereof for collecting and removing moisture from the wall cavity and vertical channels formed in the rigid insulation adjacent the exterior side thereof for collecting and removing rain water. An exterior building cladding is provided adjacent the exterior side of the rigid insulation and a plurality of non-thermal conducting (insulating) plastic connectors extend through the layer of rigid insulation and connect the exterior cladding to the interior frame. [0005]
  • The frame is typically made with wood or metal studs, e.g. galvanized sheet steel channels. The rigid insulation is typically made of plastic foam, e.g. polystyrene foam. [0006]
  • The exterior wall cladding may be any of the exterior wall claddings that are traditionally used. These may include, for example, brick veneer, wood siding, aluminum siding, vinyl siding, stucco, concrete, glass, metals, etc. [0007]
  • The non-thermal conducting (insulating) plastic connectors can be made from a variety of plastic materials having high strength and an ability to withstand high variations in temperature. High strength polyolefins, such as polyethylene or polypropylene are particularly useful. The connectors are typically made of plastic material having a form of relatively thin bands. The material may be either flexible or rigid. [0008]
  • In passing through the rigid insulation layer, the plastic connector should fit snugly within an opening in the rigid insulation through which it passes. This can conveniently be accomplished by providing the connector with a sharpened tip which can simply be pushed through the insulation, creating its own opening. [0009]
  • The inner end of each plastic connector can be connected to a frame component by a variety of means and can be very simply connected by means of screws. The outer end of each plastic connector may be connected to the building cladding in a number of different ways which will be described hereinafter.[0010]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the drawings which illustrate certain preferred embodiments of this invention: [0011]
  • FIG. 1 is an isometric view of a wall construction according to the invention; [0012]
  • FIG. 2 is a sectional elevation of a wall construction according to the invention; [0013]
  • FIG. 3 is a horizontal section through a rigid foam panel of the invention; [0014]
  • FIG. 4 is an elevation view of a valid form panel; [0015]
  • FIG. 5 is an elevation showing a detail of connector slot in the rigid form panel; [0016]
  • FIG. 6 is a perspective view of a plastic connector for brick facing; [0017]
  • FIG. 7 is a perspective view of a plastic connector passing through a foam panel; [0018]
  • FIG. 8 is a perspective view of a plastic connector for stucco lath; and [0019]
  • FIG. 9 is a perspective view of a general purpose plastic connector.[0020]
    • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • As seen in FIGS. 1 and 2, this construction according to the present invention includes an interior framework formed of [0021] steel studs 10. Each stud has an inner flange 11, an outer flange 12 and a central web 13. Floor beams 14 intersect the wall frame portions.
  • A [0022] standard wall paneling 15 is connected to inner flanges 11 of studs 10 and panels of rigid foam insulation 16 are placed adjacent the outer face of the outer flange 12 of studs 10. The inner wall panels and the foam panels form therebetween the wall cavity 17 is fill with commercial insulation, e.g. glass fiber batts.
  • The [0023] rigid foam panels 16 are connected to the studs 10 by way of plastic connectors 20 one type of which can be seen in FIG. 1. In the particular embodiment of FIGS. 1 and 2, a metal mesh stucco lath 23 is applied over the rigid foam panels 16 and over the lath is applied an exterior stucco coating 24.
  • The wall structures are horizontally separated at each floor level of a structure as can be seen in FIG. 2. A downwardly sloping metal flashing [0024] 25 is installed between the two sections for draining away any water.
  • Details of the [0025] rigid foam panels 16 can better be seen from FIGS. 3, 4 and 5 and these are preferably formed from panels having a thickness of about 2 inches. Vertical channels 21 are formed in the foam panels adjacent both the interior and exterior sides of the rigid foam panels 16 and connect to the exterior by way of thin channels 22.
  • The vertical channels in the exterior face of the rigid foam panels provides a rain screen at the interface between the stucco and the rigid insulation. Exterior water penetration drains to the bottom of the channel and exists via a [0026] drain wick 28 and flashing 25.
  • Vapour that may collect in the wall cavity is vented by way of the channels on the inside face of the rigid insulation panels. This vaporizes up through the channels and exits through the [0027] vents 26 as well as through weep holes 27.
  • The solid insulation panels also have grooves or [0028] slots 30 cut into the edge faces to allow a positive connection all around each panel by means of plastic splines inserted between the panels. These plastic splines may also be made from a polyolefin plastic such as polyethylene or polypropylene. A combination of the rigid foam panels, the plastic connectors extending through the foam panels and the plastic splines connecting the foam panels edge to edge together create a complete insulating envelope free of any thermal bridging between the interior and exterior of the building. The plastic splines when inserted in the slots 30 form a rigid lateral support between the studs. As part of this lateral strengthening, screws may extend through the splines and into the studs.
  • Details of some forms of plastic connectors can be seen in FIGS. [0029] 6 to 9. The plastic connector 36 of FIG. 6 is in the form of a wedge with a sharp tip 37 for penetrating a foam panel 16. The connector 36 has holes 40 for connecting to interior studs and an inner hole 38 containing a steel loop 39 which becomes embedded in a mortar joint between bricks thereby locking a brick outer shell to the frame.
  • The gauge shows a further form of elastic connector strip used for connecting stucco lath mesh. This [0030] strip 42 has a sharp point 44, connector holes 40 and a loop portion 43 which loops around and holds the stucco lath mesh.
  • The connector of FIG. 9 can be used for a variety of purposes having a [0031] perpendicular end flange 35. This is the flange shown in use in FIG. 1.
  • It will be understood that the wall construction of this invention can be used with any exterior building cladding, including brick, stucco or siding, e.g. wood, metal or vinyl siding. For the mounting of the siding vertical furring strip are typically used which are attached, e.g. by screws, to horizontal plastic splines [0032] 31 inserted between the rigid foam insulation panels.
  • The present invention is not limited to the embodiment disclosed and the right is reserved to make variations and modifications in the invention that do not depart from the spirit of scope thereof as herein defined by the appended claims. [0033]

Claims (15)

1. A building wall construction comprising an interior frame formed of a plurality of laterally spaced studs or beams, a layer of rigid foam insulation adjacent the exterior side of said frame and an interior wall connected to the interior side of the frame with the rigid insulation layer and interior wall forming a wall cavity therebetween, vertical venting channels formed on the interior side of said rigid insulation layer for collecting and removing moisture from the wall cavity and vertical venting channels formed on the exterior side of said rigid foam insulation for collecting and removing rain water, exterior building cladding adjacent the exterior side of said rigid foam insulation and a plurality of non-thermal conducting plastic connectors extending through said layer of rigid foam insulation and connecting said exterior cladding to said studs or beams.
2. A wall construction according to claim 1 wherein the interior frame is formed of wood or steel studs.
3. A wall construction according to claim 2 wherein the rigid foam insulation is in the form on panels having a thickness of about 1 to 3 inches.
4. A wall construction according to claim 3 wherein the rigid foam insulation panels are joined edge to edge by means of edge slots containing plastic splines.
5. A wall construction according to claim 4 wherein screws extend through the splines and into the studs.
6. A wall construction according to claim 4 wherein the vertical venting channels are laterally spaced by a distance of about 2 to 4 inches.
7. A wall construction according to claim 3 wherein the plastic connectors are flexible plastic straps.
8. A wall construction according to claim 3 wherein the plastic connectors are rigid plastic strips.
9. A wall construction according to claim 8 wherein the rigid plastic connectors are strips having sharp points capable of piercing the rigid insulation.
10. A wall construction according to claim 3 wherein the plastic connector is formed of polyolefin.
11. A wall construction according to claim 10 wherein the polyolefin is polypropylene or polyethylene.
12. A wall construction according to claim 11 wherein the plastic connectors are joined to studs by means of screws.
13. A wall construction according to claim 3 wherein the exterior cladding is stucco on metal mesh lath and the plastic connectors have loop portions which hook onto the metal mesh.
14. A wall construction according to claim 3 wherein the exterior cladding is bricks and the plastic connectors are joined to the brick wall by means of metal brick ties extending from the outer ends of the plastic connectors into the brick mortar joints.
15. A wall construction according to claim 3 wherein the exterior cladding is siding connected to vertical furring strips which are connected to horizontal plastic splines.
US10/411,305 2003-04-11 2003-04-11 Exterior building cladding having rigid foam layer with drain channels Abandoned US20040200183A1 (en)

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US10/411,305 US20040200183A1 (en) 2003-04-11 2003-04-11 Exterior building cladding having rigid foam layer with drain channels
US10/802,724 US6886301B2 (en) 2003-04-11 2004-03-18 Exterior building cladding having rigid foam layer with drain channels
CA002461501A CA2461501A1 (en) 2003-04-11 2004-03-19 Exterior building cladding having rigid foam layer with drain channels

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