Insulating roofing system for flat roofs

Abstract

A roofing system for a substantially flat roof structure is provided, including a central panel with a substantially concave surface provided with a through hole at the centre for engaging a drainage system of the flat roof, and a first row of panels assembled around the central panel. The row of panels includes tapered side panels interlocked to the sides of said the central panel and tapered corner panels interlocked with adjacent side panels. Optionally at least one further row of side and corner panels may be assembled around the first row of panels. The side and corner panels are shaped so as to retain a constant slope to direct water away from their outside edges towards the through hole of the central panel. The panels are interlocked using a system with shiplap joints.

1 . An insulating roofing system for a substantially flat roof structure, said flat roof structure being provided with at least one drainage system, said insulating roof system comprising: 
 a central panel with a substantially concave top surface, said central panel being provided with a through hole at a centre thereof, capable of operatively engaging said at least drainage system of the flat roof;    a row of panels assembled around said central panel consisting of four tapered side panels each in an interlocking engagement with one of the sides of said central panel, and four tapered corner panels in an interlocking engagement with adjacent said side panels, said tapered side and corner panels being shaped so as to define a constant slope to direct water away from outside edges of said side and corner panels towards the through hole of said central panel; wherein said central, side and corner panels all have substantially identical perimeter dimensions and said interlocking engagements use shiplap joints wherein an upper protruding edge of each panel overlaps a lower protruding edge of an adjacent panel.    
     
     
         2 . A roofing system as defined in  claim 1  wherein the substantially concave top surface of said central panel has a slope of 2%.  
     
     
         3 . A roofing system as defined in  claim 1 , wherein said tapered side panels have a surface with a slope of about 1%.  
     
     
         4 . A roofing system as defined in  claim 1 , wherein said tapered corner panels have a surface with a slope of about 1%.  
     
     
         5 . A roofing system as defined in  claim 1 , wherein said tapered corner panels are designed so that their top surface is invaginated along a line defined between the outermost and innermost corners of said corner panels.  
     
     
         6 . A roofing system as defined in  claim 1 , wherein said central, side and corner panels are made of waterproof material.  
     
     
         7 . A roofing system as defined in  claim 6  wherein said waterproof material is selected form the group consisting of expanded and extruded polystyrene, polyisocyanurate, urethane, fibreglass, fibreboard and mineral fibre.  
     
     
         8 . A roofing system as defined in  claim 1  wherein the perimeter dimensions of said central, side and corner panels are of at least 1 meter on each side thereof.  
     
     
         9 . A roofing system as defined in  claim 1 , comprising at least one additional row of said tapered side and corner panels assembled around said row of panels.  
     
     
         10 . A roofing system as defined in  claim 9  characterized in that said at least additional row of said tapered side and corner panels completely surrounds said row of panels.  
     
     
         11 . A roofing system as defined in  claim 9  characterized in that said at least additional row of said tapered side and corner panels partially surrounds said row of panels.  
     
     
         12 . A method for installing an insulating roofing system on a substantially flat roof structure, said flat roof structure being provided with a drainage system, said method comprising the following steps: 
 a) providing a central panel with a substantially concave top surface, said central panel being provided with a through hole at a centre thereof;    b) providing a plurality of tapered side panels having a top surface with a constant slope;    c) providing a plurality of tapered corner panels designed so that their top surface is invaginated along a line defined between the outermost and the innermost corners of said corner panels;    d) engaging and fixing said central panel with said drainage system of the flat roof structure;    e) in a clockwise manner, successively assembling in an interlocking engagement side panels to the sides of said central panel and corner panels with adjacent said side panels, forming a first row of panels around said central panel;    wherein said tapered side and corner panels are shaped so as to define a constant slope to direct water away from outside edges of said side and corner panels towards the through hole of said central panel; and    wherein said central, side and corner panels all have substantially identical perimeter dimensions and said interlocking engagement use a system with shiplap joints wherein an upper protruding edge of a panel overlaps a lower protruding edge of an adjacent panel.    
     
     
         13 . The method as defined in  claim 12  which further comprises a step of interlocking, in a clockwise manner, additional side and corner panels to the side and corner panels of said first row of panels, forming at least one additional row of panels to increase the whole surface of said insulating roofing system.  
     
     
         14 . The method as defined in  claim 12  which further comprises a step of interlocking said side and corner panels of said insulating roofing system to side and corner panels of at least one further insulating roofing system as defined in  claim 1 , allowing the drainage of water from various locations of said flat roof structure.