Roof System

Abstract

The invention concerns a novel roof system comprising a plurality of roof insulation panels ( 4 ) moulded from foamed polystyrene or the like material, the panels being mounted on a roof structure, which may comprise conventional purlins and rafters with roof battens or a closed roof decking of timber or the like material. In either case, the panels are supported by the roof structure and in turn provide location and support for a plurality of roof tiles ( 6, 6 a ). In order to enhance the location and support of the roof tiles on the panels, the panels are provided with upstanding walls having re-entrant angled surfaces ( 32 ) for engagement by hook-like protuberances ( 60 a, 60 b, 61 a, 61 b ) provided towards lower ends, in use, of the roof tiles. The roof tiles may be made from cementitious compositions, ceramic compositions or reconstituted slate materials. The roof system may also include reinforcement for the panels, which may be provided with for mutual interlocking engagement with sideways adjacent panels in use. Alternative uses for the panels and tiles can be as a wall cladding system.

1 . A roof system comprising a roof tile and an insulation panel for being supported on a roof structure, the roof tile being formed with an integral hook-like protuberance on an underside, in use, thereof, characterized in that the insulation panel is provided with a channel for location of the hook-like protuberance of the roof tile, the channel comprising a reentrant wall for receiving in close proximity a re-entrant wall portion of the hook-like protuberance of the roof tile, wherein said integral hook-like protuberance is located on the roof tile intermediate a top edge portion and a bottom edge portion thereof. 
   
   
       2 . The roof system according to  claim 1 , characterized in that the channel is defined by at least one lateral rib extending across the insulation panel. 
   
   
       3 . (canceled) 
   
   
       4 . The roof system according to  claim 1 , comprising a plurality of said roof tiles associated with said insulation panel. 
   
   
       5 . The roof system according to  claim 4 , wherein the insulation panel is prefabricated with a plurality of roof tiles supported thereon, together with a plurality of separate covering roof tiles to cover, in use, a join between the prefabricated insulation panel and an adjacent such insulation panel. 
   
   
       6 . The roof system according to  claim 5 , wherein the roof tiles supported on the insulation panel include roof tiles formed with underlocks and overlooks on both side edges, while the separate covering roof tiles are formed with overlooks on both side edges. 
   
   
       7 . The roof system according to  claim 1 , characterized in that the insulation panel is molded from an expanded foam material such as where said expanded foam material is selected from polystyrene, polyurethane and polyisocyanurate. 
   
   
       8 . The roof system according to  claim 7 , characterized in that the insulation panel is provided with a toughened upper surface portion. 
   
   
       9 . The roof system according to  claim 1 , further comprising a roof structure, characterized in that the roof structure is selected from (i) rafters and the insulation panel is secured directly to the rafters; and (ii) a decked roof and the insulation panel is secured directly to the decked roof. 
   
   
       10 . The roof system according to  claim 1 , characterized in that the roof tile is selected from:
 (a) a roof tile molded from a cementitious composition such as concrete mortar;   (b) a roof tile molded from a ceramic composition;   (c) a roof tile molded from a reconstituted slate composition;   (d) a roof tile molded from metal; and   (e) a roof tile molded from a plastics material.   
   
   
       11 . The roof system according to  claim 1 , wherein the insulation panel has a sandwich structure, with layers selected from layers of cardboard and layers of wood surrounding an intermediate layer of an insulating material. 
   
   
       12 . A kit of parts comprising a roof system according to any one of  claims 1 - 11 , together with a roof structure comprising rafters and purlins, wherein the roof tile is capable of being supported on the insulation panel and the insulation panel with the roof tile supported thereon is capable of being secured to the roof structure prior to being attached in situ overlying a building. 
   
   
       13 . The roof system according to  claim 8 , characterized in that said toughened upper surface portion is provided by a dense layer of polystyrene co-molded with a body of the insulation panel.