GB2303156A

GB2303156A - Cavity closure

Info

Publication number: GB2303156A
Application number: GB9613825A
Authority: GB
Inventors: Christopher Woodhall; Adrian Woodhall
Original assignee: YORKSHIRE BUILDING SERVICES
Current assignee: YORKSHIRE BUILDING SERVICES
Priority date: 1995-07-13
Filing date: 1996-07-02
Publication date: 1997-02-12
Anticipated expiration: 2016-07-02
Also published as: GB9613825D0; GB2303156B; GB9514287D0

Abstract

A cavity closure (1) comprises a length (5) of foamed, synthetic plastics, thermal insulating material of rectangular section; a strip (6) of deformable synthetic plastics material bonded to one elongate face (7) of the length (5) and extending beyond opposed longitudinal edges (8,9) of that face to define two webs (10,11) selectively deformable into an orthogonal flange (12). A plurality of clips (15) are located in spaced relationship along the length (5) of thermal insulating material, and adapted, in use, to retain the closure (1) in position in a cavity (2).

Description

BUILDING COMPONENT This invention relates to a building component in the form of a cavity closure and a clip for a cavity closure.

At the required locations for doorways and windows in cavity walls, it is necessary to close off the cavity at the jamb, cill or threshold and traditionally this has been effected by the bricklayer providing a return, but in more recent times this has been superseded by the provision of a specific, elongate closure cut to length. Previous closure proposals have however almost invariably involved the need to slide ties into the mortar courses, so as to ensure the closure is retained in position.

A basic object of the present invention is the provision of an improved closure and associated clip.

According to a first aspect of the present invention there is provided a cavity closure comprising: (i) a length of foamed, synthetic plastics, thermal insulating material of rectangular section; (ii) a strip of deformable synthetic plastics material bonded to one elongate face of the length and extending beyond opposed longitudinal edges of that face to define two webs selectively deformable into an orthogonal flange, and (iii) a plurality of clips located in spaced relationship along the length of thermal insulating material, and adapted, in use, to retain the closure in position.

According to a second aspect of independent significance, there is provided a clip for use with a cavity closure, comprising first and second orthogonal webs, with one web provided with a plurality of spaced-apart, fixing pins all projecting to the same side of the web.

Thus, the first aspect of the invention provides a one-piece cavity closure with the deformable strip constituting a damp proof course, with the clips being so located as to be engageable with a face of a brick or block so as to retain the closure at and along the mouth of the cavity opening, thereby providing a cavity closure that provides both waterproofing and thermal insulation, whilst being selflocating.

Preferably, one of the webs is provided with a strip of tacky, deformable material, such as butyl rubber, covered with a peel-off, protective strip, with a tacky strip being intended to adhere to an adjacent face of a window or door frame, to provide enhanced weatherproofing and watertightness.

The foamed synthetic plastics may be extruded polystyrene, and the strip may be of polyethylene, while the clips may be of polypropylene. The foamed synthetic plastics may be provided in a range of section sizes - typically 38 mm deep and 50, 75, 85 or 100 mm wide - to suit a range of cavity widths - typically of 50, 75, 85 and 100 mm.

It will be appreciated that with the clips of the second aspect, the two or four fixing pins thereof are simply pushed or pressed into the foam insulation at suitable spacedapart locations e.g. 300 mm so that the side of the pin carrying web from which the pins project lies on, and is virtually flush with, one face of the length of thermal insulation. Whilst the clip could be an "L"-section element, preferably the clip is in the form of a "T"-section element with the pins projecting from one side of the web of the "T".

With the "T"-section, the flange to one side of the web may engage, and be virtually flush with, an orthogonal face of the length of thermal insulation, while the other flange to the other side of the web is available to engage a portion of a face of a brick or block. One flange may be provided with a through hole to receive a masonry pin, if required.

The two aspects of the invention will now be described in greater detail, by way of examples with reference to the accompanying drawings, in which: Figure 1 is a perspective view of a cavity closure in accordance with the first aspect of the invention; Figure 2 shows the closure of Figure 1 located in a cavity; Figure 3 is a perspective view of a rear portion of Figure 2; Figures 4 and 5 are sectional views of two different locations of the cavity closure in situ; Figure 6 indicates the formation of a cavity closure with a right angle bend; Figures 7 and 8 show upright locations of the closure at a doorway; Figure 9 is a side elevation of a clip in accordance with the second aspect of the invention; Figure 10 is a view on the arrow A of Figure 8; Figure 11 is a view on the arrow B of Figure 8; and Figure 12 is a perspective view of the location and attachment of a clip of Figures 9 to 11 to a length of polystyrene.

In Figures 1 to 7, a cavity closure 1 is shown located in a cavity 2 between external brickwork 3 and internal blockwork 4, with a window opening being indicated in Figures 2 to 6, and a doorway opening in Figure 7.

The closure 1 comprises a length 5 of foamed, synthetic plastics, thermal insulating material, preferably polystyrene, of rectangular section with a strip 6 of deformable synthetic plastics material, preferably polyethylene, bonded to one elongate face 7 of the length 5 of thermal insulating material and extending beyond opposed longitudinal edges 8, 9 of that face to define two webs 10, 11 selectively deformable, by the bricklayer, into an orthogonal flange 12. One web 10 is provided with a strip 13 of tacky, deformable material, preferably butyl rubber initially covered with a peel-off, protective strip 14. A plurality of clips 15 are located in spaced relationship along the length of thermal insulating material, and adapted, in use, to retain the closure 1 in position in the cavity 2. In Figures 1, 2, 3 and 7, the clips 15 are of "L"-section.

In Figures 2 to 6, a portion of a window frame 16 is indicated, with the underside of a cill 17 engaged by the flanges 12 of the closure 1 located horizontally beneath the cill 17, and the side face 18 of upright 19 engaged by the flange 12 of the closure 1 located vertically.

Figure 6 indicates how a right angle joint may be formed for use at the top or bottom of a window frame 16, or the top of an upright 20 of a door frame 21 indicated in Figure 7.

The clip 15 detailed in Figures 9 to 11, is of "T"section with one side 22 of the web 23 of the "T" being provided with four pins 24 adapted, as indicated in Figure 12, to be pushed into the length 5 at a required clip location.

Claims

1. A cavity closure comprising: (i) a length of foamed, synthetic plastics, thermal insulating material of rectangular section; (ii) a strip of deformable synthetic plastics material bonded to one elongate face of the length and extending beyond opposed longitudinal edges of that face to define two webs selectively deformable into an orthogonal flange, and (iii) a plurality of clips located in spaced relationship along the length of thermal insulating material, and adapted, in use, to retain the closure in position.

2. A cavity closure as claimed in Claim 1, wherein one of the webs is provided with a strip of tacky, deformable material, such as butyl rubber, covered with a peel-off, protective strip.

3. A cavity closure as claimed in Claim 1 or Claim 2, wherein the foamed, synthetic plastics is extruded polystyrene.

4. A cavity closure as claimed in any preceding claim, wherein the strip is of polyethylene.

5. A cavity closure as claimed in any preceding claim, wherein the clips are of polypropylene.

6. A cavity closure as claimed in any preceding claim, wherein the foamed synthetic plastics is 38 mm deep and 50, 75, 85 or 100 mm wide.

7. A cavity closure substantially as hereinbefore described with reference to Figures 1 to 8 of the accompanying drawings.

8. A clip for use with a cavity closure, comprising first and second orthogonal webs, with one web provided with a plurality of spaced-apart, fixing pins all projecting to the same side of the web.

9. A clip as claimed in Claim 8, wherein two or four fixing pins are provided.

10. A clip as claimed in Claim 8 or 9 in the form of an "L"-section element.

11. A clip as claimed in Claim 8 or 9 in the form of a "T"-section element.

12. A clip as claimed in any one of Claims 8 to 11, of polypropylene.

13. A clip as claimed in any one of Claims 8 to 11, wherein one flange is provided with a through hole for a masonry pin.

14. A clip substantially as hereinbefore described with reference to Figures 9 to 12 of the accompany drawings.