RidgeMaster Plus offers integral ridgeline ventilation, mechanically fixed in conjunction with Tapco ridge and hip tiles. This product is inserted beneather the ridge. Installation Guide We recommend RidgeMaster Plus 11" (279mm) to meet your ventilation requirements. Make sure to follow the steps below when installing TapcoSlate and RidgeMaster Plus. 1. Cut a 1" (25mm) opening in the ridge of the roof, end all cuts 12" (305mm) from outside walls, chimneys, ridge corners or hip joints. 2. Install slates up to the opening. 3. Fold felt over last course of slates or install metal J channel to prevent the infiltration of fine powder snow between keyways. 4. Install RidgeMaster Plus using 3" (76mm) roofing nails. RidgeMaster Plus should be installed 12" (305mm) beyond the slot opening. For best appearance install RidgeMaster Plus along the entire length of the ridge. 5. Install TapcoSlate Ridge Cap pieces over the RidgeMaster Plus, nailing in the designated RidgeMaster Plus nail target area. Use 3" (76mm) long Stainless Steel nails. 6. RidgeMaster Plus has an overlap and an under lap end that interlock when laid end to end in proper orientation. This unites the 4 foot (1.22m) sections into a single structural integrated, weather tight system. Always install RidgeMaster Plus with overlap end on outside terminal end of ridge. You should also complete your ridge vent with factory end on the opposite terminal end of the ridge. RidgeMaster Plus will provide 12.228 square inches (7889mm) of NFVA per linear foot. Note This product is only avaliable in the slate grey (703) colour but is not visible once the ridge is installed. Ridges are NOT included with this product and need to be purchased seperately.