Roof System

Abstract

A roof system comprises a lower layer of composite insulating panels ( 2 ), a protective barrier layer ( 3 ) and an upper decorative layer ( 4 ) which provides a roof garden. The panels ( 2 ) comprise a profiled internal sheet ( 5 ), a generally flat external sheet ( 6 ) with an insulating core ( 7 ) therebetween. The panels ( 2 ) provide a mechanically strong roof structure to support the garden layer ( 4 ). The panels ( 2 ) are protected by a roof barrier membrane ( 11 ).

1 - 29 . (canceled) 
   
   
       30 . A roof system comprising a support layer comprising a composite insulated panel of the type having a profiled sheet and a generally flat sheet with an insulating core between the profiled sheet and the flat sheet; and a barrier layer applied to the generally flat sheet of the support layer for reception of an upper decorative layer. 
   
   
       31 . The system as claimed in  claim 30  wherein the barrier layer comprises a root barrier membrane. 
   
   
       32 . The system as claimed in  claim 30  wherein the decorative layer comprises a growing medium for plants and the like. 
   
   
       33 . The system as claimed in  claim 30  wherein the decorative layer is arranged to cover only a portion of the top face of the composite insulating panels. 
   
   
       34 . The system as claimed in  claim 30  wherein the decorative layer comprises a water receiving layer. 
   
   
       35 . The system as claimed in  claim 30  wherein the decorative layer comprises stones and/or sand and/or gravel. 
   
   
       36 . The system as claimed in  claim 30  wherein the decorative layer comprises a drainage, aeration and water storage layer. 
   
   
       37 . The system as claimed in  claim 36  wherein the drainage, aeration and water storage layer comprises a top face and a plurality of recessed wells. 
   
   
       38 . The system as claimed in  claim 37  wherein the recessed wells project downwardly to contact an underlying surface and to space the top face apart from the underlying layer. 
   
   
       39 . The system as claimed in  claim 30  wherein the decorative layer comprises a permeable membrane. 
   
   
       40 . The system as claimed in  claim 39  wherein the permeable membrane is laid on top of the drainage, aeration and water storage layer. 
   
   
       41 . The system as claimed in  claims 39  wherein the permeable membrane comprises a geotextile fabric. 
   
   
       42 . The system as claimed in  claim 32  wherein the planting medium comprises soil or peat or sand, or any suitable mixture thereof. 
   
   
       43 . The system as claimed in  claim 30  comprising drainage means. 
   
   
       44 . The system as claimed in  claim 30  wherein the panels are connected to supporting external and/or internal walls. 
   
   
       45 . The system as claimed in  claim 30  wherein the root barrier layer is connected to the panels by adhesive or other suitable fixing means. 
   
   
       46 . The system as claimed in  claim 30  wherein the barrier layer is connected to the external walls. 
   
   
       47 . The system as claimed in  claim 44  comprising a metal coping for connection to the external walls. 
   
   
       48 . The system as claimed in  claim 30  comprising a decorative layer retention device to define the perimeter of the decorative layer. 
   
   
       49 . The system as claimed in  claim 30  wherein the profiled sheet of the composite insulated pane defines a plurality of channels extending longitudinally along the length of the panel. 
   
   
       50 . The system as claimed in  claim 49  wherein the channels are of generally trapezoidal shape comprising a generally flat base and side walls which extend from and diverge outwardly from the base. 
   
   
       51 . The system as claimed in  claim 50  wherein the side walls of the trapezoidal formations are stepped side-walls. 
   
   
       52 . The system as claimed in  claim 50  wherein the profiled sheet has transversely extending reinforcing ribs. 
   
   
       53 . The system as claimed in  claim 30  wherein the profiled sheet has a first overlap portion on one side and a second overlap portion on the opposite side, the first overlap portion being substantially free of insulating core, the side edge of the insulating core at the first overlap portion having a first inclined wedge face and the side edge of the insulating core at the second overlap portion having a second inclined wedge face which is oppositely directed to the first inclined wedge face at the first overlap portion, the overlap portions and the wedge faces of the insulating core of adjacent like panels being interengageable on assembly. 
   
   
       54 . The system as claimed in  claim 53  wherein the profiled sheet overlap portions are defined by part trapezoidal portions. 
   
   
       55 . The system as claimed in  claim 30  wherein the generally flat or second sheet has a second sheet first overlap portion on one side and a second sheet second overlap portion on the opposite side. 
   
   
       56 . The system as claimed in  claim 55  wherein the overlap portions comprise profiled portions of the external sheet. 
   
   
       57 . The system as claimed in  claim 55  wherein the second sheet has an outer male projecting part and an inner recess part on one side, and a corresponding outer recess part and projecting inner male part respectively on the opposite side of the panel.