Fire-resistant roof system and membrane composite

A roof assembly comprising:

• (a) a wood roof deck;
• and
• (b) a composite covering the wood roof deck, where the composite includes a thermoplastic membrane having first and second planar surfaces and a fabric backing attached to at least a portion of the second planar surface of the membrane, where the fabric backing includes first and second planar surfaces, where the first planar surface of the fabric is attached to the membrane, where the second planar surface of the fabric has a coating composition disposed thereon, where the coating composition includes expandable graphite dispersed within a binder, where the second planar surface of the fabric is proximate to said roof deck relative to the second planar surface of the fabric, and wherein the roof assembly achieves a Class A rating pursuant to UL 790 and/or ASTM E 108.

A membrane composite comprising:

• (a) a thermoplastic membrane having first and second planar surfaces, where said thermoplastic membrane includes a first thermoplastic layer and a second thermoplastic layer with a reinforcing scrim located between said first thermoplastic layer and said second thermoplastic layer;
• and
• (b) a fabric secured to at least a portion of the second planar surface of the membrane, where the fabric includes first and second surfaces, where the first planar surface of the fabric is attached to the second planar surface of the membrane, where the second planar surface of the fabric has a coating composition disposed thereon, where the coating composition includes expandable graphite dispersed within a binder.