[Exterior only remodel]: 4368 Shingle Roofing Shingle replacement, Complete tear-off of existing asphalt shingles (9.50 SQ) down to the deck. Installation of new synthetic underlayment, ice and water shield, and GAF Timberline HDZ asphalt shingles. Replace up to 3 sheets of damaged 7/16" OSB sheathing if necessary. Installation includes new drip edges and ridge vents.