If more than two layers of shingles are on the existing roof, all existing shingles have to be removed. Contractor will re-flash at all roof penetrations with metal flashing. Metal flashing to be let into masonry mortar joints. Install new metal drip edging at all edges of the roof. Install new shingles per manufacturer's installation instructions.
Contractor has to provide home owner with copy of installation instructions.
All debris generated by re-roofing to be removed from premises. Knob and tube wiring and all other damaged wiring shall be replaced with new, minimum 12-gauge copper conductors. If updating, use 100-200 amp. Repair of existing plumbing supply lines Galvanized, corroded, compressed or damaged supply lines are to be removed and new supply lines installed. Contractor will make provisions to install air chambers to eliminate water hammer.