Some embodiments of the present disclosure relate to a roofing system. In some embodiments, the roofing system includes a first roofing material, wherein the first roofing material comprises a top surface and a bottom surface. In some embodiments, the top surface of the first roofing material comprises a nail zone with a plurality of fines. In some embodiments, the roofing system includes a second roofing material, wherein the second roofing material comprises a top surface and a bottom surface. In some embodiments, the bottom surface of the second roofing material comprises a plurality of fines. In some embodiments, the roofing system comprises and a patterned adhesive, which directly contacts at least a portion of the plurality of fines in the nail zone and at least a portion of the plurality of fines on the bottom surface of the second roofing material.

Some embodiments of the present disclosure relate to roofing systems including a substrate and adhesive formulations that are free of asphalt or substantially free of asphalt. Some embodiments of the present disclosure relate to methods of making one or more adhesive formulations that are free of asphalt or substantially free of asphalt. Some embodiments of the present disclosure relate to systems utilizing one or more adhesive formulations that are free of asphalt or substantially free of asphalt.

A system includes a plurality of photovoltaic shingles installed on a roof deck, each of the shingles having a first layer including a head lap portion, and a second layer including at least one solar cell. A first photovoltaic shingle overlays at least a part of the head lap portion of a second photovoltaic shingle. The system includes at least one wireway installed proximate to a first end of at least the first photovoltaic shingle.

A roofing shingle has an upper surface, a lower surface, and a sealant material applied along the lower surface. A pressure relief channel is formed along the lower surface of the roofing shingle, with a release strip applied over the pressure relief channel. When the roofing shingle is paired with another roofing shingle in a stack, the sealant material of the roofing shingle is arranged in registration with the release strip and pressure relief channel of the other roofing shingle.

Bituminous tile with sealing engagement devices delimiting positioning areas of the anchoring nails including a tile body of the layered type and provided with shaped flaps delimited by separation cuts, wherein the upper face of the tile body is provided with a plurality of sealing engagement devices which are made in such a way as to have an immediately identifiable nailing area which is perimetrically delimited by a sealing engagement area that is made of an adhesive and/or thermally adhesive and/or hot melt material. The sealing engagement area enables the bonding engagement of the corresponding flap of the bituminous tile that in a laid condition is thereby overlapped, also enables a perfect sealing of the insertion area of the anchoring nail.

Roofing shingles are disclosed that are capable of self-adhering to a roof deck or underlayment and/or other roofing shingles and that require few or no mechanical fasteners to remain attached to the roof. By appropriate positioning of sealant lines on the shingle, direct adhesion between the shingle and the roof deck or underlayment and/or other roofing shingles can be achieved. If the shingle is laminated, the layers may be mechanically attached with indentations in the common bond area. The nail zone of the shingle may be visually indicated with fines and/or one or more paint lines. A roofing system comprising a plurality of courses of the shingles is also disclosed.

Shingles have self-seal strips with features that include sealant dashes or dots separated by drainage gaps. The self-seal strips are registered with each shingle so that the features are positioned at the same locations on each shingle. A method of making such shingles includes synchronizing the rotation of sealant applicator wheels with the shingle chop cutter so that cuts are made at repeated designated locations along the applied self-seal strips.

A system includes a plurality of photovoltaic shingles installed on a roof deck, each of the shingles having a first layer including a head lap portion, and a second layer including at least one solar cell. A first photovoltaic shingle overlays at least a part of the head lap portion of a second photovoltaic shingle. The system includes at least one wireway installed proximate to a first end of at least the first photovoltaic shingle.

Some embodiments of the present disclosure relate to a roofing system. In some embodiments, the roofing system includes a first roofing material, wherein the first roofing material comprises a top surface and a bottom surface. In some embodiments, the top surface of the first roofing material comprises a nail zone with a plurality of fines. In some embodiments, the roofing system includes a second roofing material, wherein the second roofing material comprises a top surface and a bottom surface. In some embodiments, the bottom surface of the second roofing material comprises a plurality of fines. In some embodiments, the roofing system comprises and a patterned adhesive, which directly contacts at least a portion of the plurality of fines in the nail zone and at least a portion of the plurality of fines on the bottom surface of the second roofing material.

Some embodiments of the present disclosure relate to roofing systems. In some embodiments, the roofing system includes a deck, a roofing material, and an underlayment configured to be positioned between the roofing material and the deck. In some embodiments, the underlayment comprises a foil layer and an adhesive layer that is attached to the foil layer and attachable to the deck. Methods of manufacturing roofing systems are also disclosed.