Roofing system having tapered insulation panels, a roof assembly kit and a method of installing thereof

A roof assembly kit comprising:

• a plurality of tapered insulation panels, wherein the plurality of tapered insulation panels is configured to be installed onto a roof deck of a low slope roof, with each tapered insulation panel of the plurality of tapered insulation panels having an upper surface, a lower surface, a first side surface that extends from the upper surface to the lower surface, and a second side surface that is opposite to the first side surface and extends from the upper surface to the lower surface, wherein each tapered insulation panel of the plurality of tapered insulation panels comprises an individually formed, tapered polyisocyanurate foam panel that extends uniformly from (i) the upper surface to the lower surface and (ii) the first side surface to the second side surface;
• at least one non-tapered insulation panel having an upper surface and a lower surface, wherein the lower surface of the at least one non-tapered insulation panel is configured to be installed onto the upper surface of each tapered insulation panel of the plurality of tapered insulation panels, wherein the at least one non-tapered insulation panel comprises a non-tapered polyisocyanurate foam panel;
• a membrane layer having an upper surface and a lower surface, wherein the membrane layer is configured to be installed onto the upper surface of the at least one non-tapered insulation panel, wherein the membrane layer comprises at least one of (i) a single-ply TPO membrane, (ii) a single-ply PVC membrane, (iii) an ethylene propylene diene terpolymer membrane (EPDM), (iv) a modified bitumen roofing layer, or (v) a built-up roofing (BUR) layer;
• and
• instructions for installation of (i) the plurality of tapered insulation panels on the roof deck, (ii) the at least one non-tapered insulation panel on the plurality of tapered insulation panels, and (iii) the membrane layer on the at least one non-tapered insulation panel, such that the upper surface of the membrane layer is exposed.

A method comprising:

• obtaining a plurality of tapered insulation panels, with each tapered insulation panel of the plurality of tapered insulation panels having an upper surface, a lower surface, a first side surface that extends from the upper surface to the lower surface, and a second side surface that is opposite to the first side surface and extends from the upper surface to the lower surface, wherein each tapered insulation panel of the plurality of tapered insulation panels comprises an individually formed, tapered polyisocyanurate foam panel that extends uniformly from (i) the upper surface to the lower surface and (ii) the first side surface to the second side surface;
• obtaining at least one non-tapered insulation panel having an upper surface and a lower surface, wherein the at least one non-tapered insulation panel comprises a non-tapered polyisocyanurate foam panel;
• obtaining a membrane layer having an upper surface and a lower surface, wherein the membrane layer comprises at least one of (i) a single-ply TPO membrane, (ii) a single-ply PVC membrane, (iii) an ethylene propylene diene terpolymer membrane (EPDM), (iv) a modified bitumen roofing layer, or (v) a built-up roofing (BUR) layer;
• obtaining instructions for installation;
• applying the plurality of tapered insulation panels onto a roof deck in accordance with the instructions for installation;
• applying the at least one non-tapered insulation panel onto the plurality of tapered insulation panels, such that the lower surface of the at least one non-tapered insulation panel is applied onto the upper surface of each tapered insulation panel of the plurality of tapered insulation panels, in accordance with the instructions for installation;
• and
• applying the membrane layer to the upper surface of the at least one non-tapered insulation panel, such that the upper surface of the membrane layer is exposed and the lower surface of the membrane layer is applied onto the upper surface of the at least one non-tapered insulation panel, in accordance with the instructions for installation.