GB2182960A

GB2182960A - Insulated roof

Info

Publication number: GB2182960A
Application number: GB08528194A
Authority: GB
Inventors: Peter Duncan Cooke; Joseph Heatrick Kerr
Original assignee: Springvale EPS Ltd
Current assignee: Springvale EPS Ltd
Priority date: 1985-11-15
Filing date: 1985-11-15
Publication date: 1987-05-28
Anticipated expiration: 2005-11-15
Also published as: GB2182960B; GB8528194D0

Abstract

A roof section comprises a pair of laterally spaced apart beam members 10, a roof panel comprising a pair of sheet form members 16 arranged to span the space between said beam members at or adjacent the upper and lower surfaces thereof and heat insulating material 17 located in the space defined by the sheet form members. The beam members may be of box form with heat insulating material 14 located therewithin. The upper sheet may be plywood and the lower sheet hardboard. The insulating material may be expanded polystyrene. A roof may comprise a plurality of such sections with angle form inserts located within the adjacent beam members at the ridge. The lower end of the beam may carry a wedge 22 which engages with wall plate 21. <IMAGE>

Description

SPECIFICATION Roofs The invention relates to roofs and more particularly to partially pre-formed, factory manufactured, roof panels and roofs formed therefrom.

With traditional purlin or attic truss roofs presently available it is difficult to fully utilise roof space for living or even storage purposes. Furthermore, it is difficult or impossible with such roofs to provide high levels of insulation in the pitch of the roof.

It is an object of the present invention to obviate or mitigate such problems.

According to the invention there is provided a roof section which comprises a pair of laterally spaced apart beam members, a roof panel comprising a pair of sheet form members arranged to span the space between said beam members at or adjacent the upper and lower surfaces thereof and heat insulating material located in the space defined by the sheet form members.

The beam members may be of box form with heat insulating material located therewithin.

Battens may be located on the outer surfaces of the sheet form members and on the side surfaces of the beam members adjacent the lower surface thereof to receive the outer surface of the lowermost sheet form members.

Angle form inserts may be located within two adjacent beam members at the ridge of the roof. Alternatively or in addition cheeks may be attached to the beam members to accommodate a ceiling strut or tie spanning between two opposed beam members. Each beam member may have a generally wedge shaped member located adjacent its lower end for engaging with a wallplate located at the top of a wall in use.

The foregoing and further features of the invention may be more readily understood from the following description of some preferred embodiments thereof, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a transverse sectional view of a part of a roof; Figure 2 is a transverse sectional view of a roof panel in Fig. 1; Figure 3 is a transverse sectional view of a beam of Fig. 1; and Figures 4, 5 and 6 are side elevational views of roof sections showing various fixings therefor.

Referring now firstly to Figs. 1, 2 and 3 there is shown a section of a roof comprising box beams 10 adjacent ones of which are spanned by preformed panel sections 11.

Each box beam 10 comprises upper and lower members 12 side cheeks 13 and a heat insulating core 14. Ledges 15 are attached to side cheeks 13 for supporting panel sections 11.

Typically members 12 will be timber 95 mm by 35 mm and cheeks 13 will be 9 mm plywood. The beams 10 could also be provided in solid or laminated timber or in rolled metal of various profiles (e.g. "Z" purlins).

Panels 11 comprise upper and lower sheet form members 16 with a heat insulating core 17 sandwiched therebetween. Typically upper sheet 16 will be formed of 9 mm thick plywood having an area of 1220 mm by 2348 mm and lower sheet 16 will be formed of 3.2 mm oil tempered hardboard of 1113 mm by 2438 mm. Counter-battens 18 are nailed to the outer surfaces of members 16 from within prior to assembly.

Insulating cores 14 and 17 could each be formed of expanded polystyrene and be 200 mm in depth.

In use beams 10 are located to spanup the pitch of a roof, panels 11 are then lowered between them on to ledges 15 and nailed to the tops of beams 10. Internal finishes are fixed to the beams 10 and intermediate battens 18. Sarking felt may be located over panels 11 and counter battens 19 are nailed over panels 11 where they butt together above the mid point of beams 10. Ordinary tiling/slating battens and roofing finish are fixed above these.

Referring now to Fig. 4 there is shown one form of locating a beam 10 at a wall 20 in which a wall plate 21 is located above wall 20 and a wedge-shaped member 22, carried on beam 10 engages therewith.

Referring now to Fig. 5 there is shown a method of locating beams 10 at the ridge of a roof in which an angled laminated timber insert 23 is located within one beam 10 and the other is offered to it and nailed.

Referring now to Fig. 6 there is shown a ceiling strut or tie 24 located spanning between two beams 10. Plywood cheeks 25 are located on each side of each beam 10 and strut 24 is located between the pairs of cheeks 25.

The beams and panels can also be used as a flat roof deck.

In the pitched roof format the upper floor may be covered in plywood, with all joints staggered, and becomes a stressed skin to triangulate the thrust forces generated by the roofing system.

The roofing system disclosed provides: A roof space completely clear of supporting crosswails or trusses. (The only'exception is the ceiling strut or tie where required). This allows a wide choice of room layouts or the space to be left completely open. This is not possible with traditional purlin or attic truss roofs.

Also high levels of insulation in the pitch of the roof. This is difficult, if not impossible to provide in a traditionally constructed pitched roof, as the normal rafter depth is insufficient for the insulant and the required ventilation space exterior to the insulant.

Claims

1. A roof section which comprises a pair of laterally spaced apart beam members, a roof panel comprising a pair of sheet form members arranged to span the space between said beam members at or adjacent the upper and lower surfaces thereof and heat insulating material located in the space defined by the sheet form members;

2. A roof section as claimed in claim 1 wherein the beam members are of box form with heat insulating material located therewithin;

3. A roof section as claimed in Claim 1 or 2 wherein battens are located on the outer surface of the sheet form members;

4. A roof section as claimed in any preceding claim wherein battens are located on the side surfaces of the beam members adjacent the lower surface thereof to receive the outer surface of the lowermost sheet form members;

5. A roof assembly comprising a plurality of roof sections as claimed in any preceding claim wherein angle form inserts are located within two adjacent beam members at the ridge of the roof;

6. A roof assembly as claimed in claim 5 wherein cheeks are attached to the beam members to accommodate a ceiling strute or tie spaning between two opposed beam members;

7. A roof assembly as claimed in claim 5 or 6 wherein each beam member has a generally wedged shape member located adjacent its lower end for engaging with a wallplate located at the top of a wall, in use.

8. A roof section substantially as hereinbefore described with reference to the accompanying drawings.