Most of Shrewsbury's housing stock went up between 1970 and 1999, which means many roofs in town are now on their second or third covering and running out of service life. A roof that has been through four decades of Worcester County winters, ice dams, wind-driven rain, and freeze-thaw cycling is not just worn shingles. The deck underneath has absorbed what got through, the flashing has lifted and reseated in the cold, and the ventilation was probably undersized to begin with. The repair call usually follows a leak, but the scope is almost always broader once we see the deck and attic together.
A complete asphalt shingle installation starts at the old roof and works down before it builds back up. Tear-off and haul-away of the existing material, a deck inspection to find soft or delaminated sheathing, ice-and-water shield at eaves and valleys per Massachusetts 780 CMR, synthetic underlayment over the remaining field, new flashing re-formed at every wall and chimney, drip edge, starter strip, shingle courses installed with four to six nails per shingle in the manufacturer's nailing zone, ridge cap, and balanced intake and exhaust ventilation sized to the attic. That is the standard scope. Structural decking beyond a small allowance, gutter replacement, skylight unit replacement, chimney masonry repair, and permit fees are typically separate unless specified in writing.
The Full Scope of the Work
Full tear-off and re-roof, deck inspection and sheathing replacement, ice-and-water shield, underlayment, flashing, drip edge, architectural and impact-resistant shingle installation, ridge and soffit ventilation, clean-up, and magnetic nail sweep.