Tear Off: • Remove existing layers of roofing material • Inspect existing decking and determine if any existing decking needs replacement • Clean decking to provide smooth surface for new roofing material and remedy insufficiently fastened decking Underlayment: • Fit membrane roof surface with ½” (one-half inch) Medium Density Fiber Board (MDF) • Fasten MDF to existing substrate • Fill low spots with additional Poly-ISO or MDF to raise surface Roofing Membrane: • Cover taper system an ethylene propylene diene terpolymer (EPDM) membrane bonded with solvent-based contact adhesive • 060 Mil thickness (fully adhered) • Where feasible, use 20’ (twenty-foot) wide rolls to minimize the number of seams • Lap seams shall have 6” (six-inch) in-seam tape applied between layers • All seams shall be primed and covered with 6” (six-inch) cured cover tape • EPDM shall be terminated below the roof elevations, against the existing fascia • Re-enforce inside and outside corners with EPDM patches, tape all butt-seams, and tape all “T” intersections with T-patches
