Abstract: A roofing assembly for shieldingly covering the planking of a flat roof. At least one water drainage outlet is provided about a portion of its surface. The roofing assembly comprises: (a) a thick, substantially flat insulating batt; (b) top waterproofing membranes, gravel layer and cardboard layer;, and bottom waterproofing membranes and gypsum layer, being respectively applied on top and bottom walls of the insulating batts; (c) a rigid, corrugated sheet member, applied directly under the bottom gypsum layer and supporting the insulating batt and destined to be applied directly against the roof planking. The corrugated sheet member is formed by a thin rigid sheet, this thin sheet undulating in a wave-like pattern along a lengthwise direction, whereby the corrugated sheet member has a depth formed by the transverse gap between a successive pair of trough and crest of the wave-like thin sheet.

Abstract: A draining system for water which may collect between the upper and lower membranes of flat, horizontal or slightly sloped insulated roofs upon perforation of the upper membrane. The insulating panels located between the two membranes are provided at both their upper and lower faces with a network of intersecting grooves, and these networks communicate with each other through passages made through the insulating panels or constituted at the panel joints. A lower drain member is sealed to and opens above the lower membrane to drain any water having seeped under the broken or perforated upper membrane, so as to prevent deterioration of the insulating panels and water accumulation which may provoke considerable roof overload problems. In certain roof constructions, the network of upper grooves is not necessary.

Abstract: A shingle system for covering sloping roofs and also capable of being used as wall sidings. The shingles are made of heat-insulating material and each main shingle has at its underface a network of intersecting channels communicating with the channels of adjacent shingles for ventilation of the space between the support surface and the shingles, to prevent water condensation. The shingles are laid in cross-rows and longitudinal rows and have keys to interlock adjacent shingles along both rows. The shingles have water barriers at their top face to prevent wind-swept rainwater from entering the joints between adjacent shingles and from overflowing onto the support surface. Concealed passageways are provided to allow this water to run off the shingles. Ridge shingles and side edge shingles are also provided to prevent rain from reaching the support surface, while permitting air circulation between the shingles and the support surface. A fascia board is also provided for the same purpose.

Abstract: The present invention relates to a ventilation system which makes the drying of roof insulation easier when there is a break in the vapor barrier or in the impermeable membrane protecting the said insulation. The system comprises an impermeable sheet composed of a series of openings distributed on its surface and a plurality of supports arranged between the openings.