What Drives Roof Replacement Cost in Montgomery County

Roof size and complexity

Roofs are priced by the square (100 square feet). Steep pitches, many valleys, dormers, chimneys and skylights all add labor and flashing. A simple ranch costs far less per square than a steep colonial with dormers.

Tear-off and decking

Removing one layer is standard; two or three layers add disposal cost. Rotted or delaminated plywood found after tear-off is replaced per sheet, so a good quote lists that price up front.

Materials

• Architectural asphalt shingles: the most common and economical choice
• Metal: higher upfront, very long life
• Synthetic slate or cedar look: premium appearance for older Main Line-style homes
• Flat roofs (EPDM, TPO, modified bitumen) for porches, additions and low slopes

What should be in every quote

• Full tear-off, underlayment type and ice-and-water shield locations
• New drip edge, flashing and pipe boots
• Ventilation plan
• Decking replacement price per sheet
• Permit, disposal and cleanup
• Manufacturer and workmanship warranty in writing
• The contractor's PA HIC registration number

Ways to save

Schedule in the off-season, keep the roof design simple, and check whether storm damage makes part of the job an insurance claim. Don't save by skipping ice-and-water shield or ventilation: those are what keep Montco roofs from leaking in winter.

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