Despite their name, flat roofs do have a very low slope or pitch. While they tend to be more common on large commercial buildings, they do have some residential appeal as well. Gutterman Services puts a minimum 10-year warranty on all flat/low slope roofing systems.
EPDM rubber: Least expensive option, but tends to absorb heat.
TPO/heat welded vinyl: Most energy efficient (readily available in white + gray), welded seams add more durability than EPDM.
Modified asphalt: As a multi-ply layered material, it stands up to sharp objects and collisions better than EPDM and TPO. It is less energy efficient than TPO and harder to install than its single-ply relatives.
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