Abstract: According to one aspect, a roofing system includes a plurality of insulation boards adapted for overlying a roof deck to form a layer of insulation. Each of the plurality of insulation boards includes a first polyisocyanurate foam having a first foam density. The roofing system further includes a plurality of cover boards adapted for overlying the layer of insulation. Each of the plurality of cover boards includes a second polyisocyanurate foam having a second foam density, and the second foam density is greater than the first foam density. Each of the insulation boards and cover boards may have a facer on at least one major surface. The second foam density may be selected to provide the cover boards with a compressive strength to resist deformation.

Abstract: According to one aspect, a roofing system includes a plurality of insulation boards adapted for overlying a roof deck to form a layer of insulation. Each of the plurality of insulation boards includes a first polyisocyanurate foam having a first foam density. The roofing system further includes a plurality of cover boards adapted for overlying the layer of insulation. Each of the plurality of cover boards includes a second polyisocyanurate foam having a second foam density, and the second foam density is greater than the first foam density. Each of the insulation boards and cover boards may have a facer on at least one major surface. The second foam density may be selected to provide the cover boards with a compressive strength to resist deformation.

Abstract: A cover board composite for overlying insulation of a roofing system includes a high-density core layer that is at least predominantly of a polymer material, a facer overlying and bonded to a bottom major surface of the core layer, and a reinforcement interposed between the facer and the bottom major surface of the core layer to coincide with a fastener pattern for securing the cover board composite to a roof deck and increase a per-fastener wind-uplift pull through rating for the cover board composite.

Abstract: A roofing system includes a plurality of insulation boards adapted for overlying a roof deck to form a layer of insulation, and a plurality of cover boards adapted for overlying the layer of insulation. Each insulation board includes a foam material that includes polyisocyanurate or polyurethane, the foam material having a first density. Each cover board includes a material including polyisocyanurate or polyurethane, the material having a second density greater than the first. The roofing system may further include a waterproofing membrane adapted for overlying the cover boards. The insulation boards and cover boards may include facers on top or bottom surfaces.

Abstract: A roofing system includes a layer of insulation boards overlying a roof deck, and a layer of cover boards overlying the insulation boards. The insulation boards include a polyisocyanurate or polyurethane foam material that has a first density. The cover boards include a polyisocyanurate or polyurethane material that has a second density. The second density is greater than the first. The roofing system may also include a waterproofing membrane overlying the cover boards.

Abstract: A cover board composite for overlying insulation of a roofing system includes a high-density core layer that is at least predominantly of a polymer material, a facer overlying and bonded to a bottom major surface of the core layer, and a reinforcement interposed between the facer and the bottom major surface of the core layer to coincide with a fastener pattern for securing the cover board composite to a roof deck and increase a per-fastener wind-uplift pull through rating for the cover board composite.

Abstract: A roofing system includes a layer of insulation boards overlying a roof deck, and a layer of cover boards overlying the insulation boards. The insulation boards include a polyisocyanurate or polyurethane foam material that has a first density. The cover boards include a polyisocyanurate or polyurethane material that has a second density. The second density is greater than the first. The roofing system may also include a waterproofing membrane overlying the cover boards.

Abstract: A prefabricated cover board has a high-density polymer or predominantly polymer material core layer having a density between 4 lbs/ft3 and 25 lbs/ft3. A prefabricated roofing panel composite includes the cover board and an insulation board that has a low-density polymer or predominantly polymer material foam core layer preferably having a density less than 2.5 lbs/ft3. The cover board may have a waterproofing membrane forming the top major surface of the cover board. When making the roofing panel composite, the low-density foam core layer of the insulation board may be formed with the high-density core layer of the cover board being currently or subsequently formed over and bonded to a top major surface of the low-density foam core layer in the same operation or preformed insulation boards may be fed into a production line with the high-density core layer of the cover board being formed over and bonded to top major surfaces of the low-density foam core layers of the insulation boards.

Abstract: A prefabricated cover board has a high-density polymer or predominantly polymer material core layer having a density between 6 lbs/ft3 and 25 lbs/ft3. A prefabricated roofing panel composite includes the cover board and an insulation board that has a low-density polymer or predominantly polymer material foam core layer having a density less than 6 lbs/ft3. The cover board may have a waterproofing membrane forming the top major surface of the cover board. When making the roofing panel composite, the low-density foam core layer of the insulation board may be formed with the high-density core layer of the cover board being currently or subsequently formed over and bonded to a top major surface of the low-density foam core layer in the same operation or preformed insulation boards may be fed into a production line with the high-density core layer of the cover board being formed over and bonded to top major surfaces of the low-density foam core layers of the insulation boards.

Abstract: A prefabricated cover board has a high-density polymer or predominantly polymer material core layer having a density between 6 lbs/ft3 and 25 lbs/ft3. A prefabricated roofing panel composite includes the cover board and an insulation board that has a low-density polymer or predominantly polymer material foam core layer having a density less than 6 lbs/ft3. The cover board may have a waterproofing membrane forming the top major surface of the cover board. When making the roofing panel composite, the low-density foam core layer of the insulation board may be formed with the high-density core layer of the cover board being currently or subsequently formed over and bonded to a top major surface of the low-density foam core layer in the same operation or preformed insulation boards may be fed into a production line with the high-density core layer of the cover board being formed over and bonded to top major surfaces of the low-density foam core layers of the insulation boards.

Abstract: A roofing system for a roof deck able to retain mechanical fasteners includes a layer of roof insulation boards overlaying the roof deck and a plurality of spaced apart hold-down straps overlaying the roof insulation boards. The hold-down straps have pre-formed mechanical fastener openings therethrough on preselected center to center spacings and mechanical fasteners pass down through the mechanical fastener openings in the hold-down straps, through the roof insulation boards, and into the roof deck to secure the roof insulation boards to the roof deck. Preferably, the roof insulation boards each have guidelines thereon for placement of the hold-down straps relative to the roof insulation board.

Abstract: A roofing system for a roof deck able to retain mechanical fasteners includes a layer of roof insulation boards overlaying the roof deck and a plurality of spaced apart hold-down straps overlaying the roof insulation boards. The hold-down straps have pre-formed mechanical fastener openings therethrough on preselected center to center spacings and mechanical fasteners pass down through the mechanical fastener openings in the hold-down straps, through the roof insulation boards, and into the roof deck to secure the roof insulation boards to the roof deck. Preferably, the roof insulation boards each have guidelines thereon for placement of the hold-down straps relative to the roof insulation board.