CertainTeed's FlintBoard® ISO T is a high-performing, sloped insulation board for low-slope roofing applications. The tapered design promotes proper roof drainage and prevents ponding water, which can be detrimental to roof membranes. FlintBoard® roof insulation slows the flow of heat into and out of the building through the roof deck, reducing energy costs for building owners as well as thermal strain to the roof system. Composed of a closed-cell polyisocyanurate foam core, FlintBoard® offers the highest R-value (resistance to heat flow) per inch available and long-term thermal resistance values (LTTR*) from 5.7 to 27, LTTR. FlintBoard® ISO T is available in 4' x 4' panels with the following slopes: 1/16" (2mm), 1/8" (3 mm), 3/16", (5 mm), 1/4" (6 mm), 3/8" (10 mm) and 1/2" (13 mm) per foot. FlintBoard® ISO-T is also available as pre-cut and pre-assembled hips, valleys, and sumps. FlintBoard® ISO T is faced on top and bottom surfaces with organic fiber-reinforced felt,...See More compatible with several insulation adhesives. FlintBoard® may also be mechanically attached. FlintBoard® ISO T is designed to be easy to install, with a lightweight, rigid construction that makes it simple to handle and position on the roof. During application, standard FlintBoard® ISO is installed in layers to build stepped height as needed, topped with FlintBoard® ISO T for final desired slope. FlintBoard® ISO T is primarily manufactured with a 20-psi formulate and is also available in 25-psi. This versatile insulation product is engineered for use with built-up and modified asphalt roof systems, single-ply systems and coal tar. Reach out to your local CertainTeed Territory Manager to request a sample and demonstration of FlintBoard® ISO T. *LTTR is the industry standard method for calculating the 15-year time-weighted average for roof insulation. See Less