Asphalt shingles, metal roofing, flat roofs — what each costs, how long they last, and what Boston's weather means for your roofing decision.
A roof replacement is one of the larger investments a Boston homeowner makes, and one of the most important. Here's what it actually costs and what to consider for Boston's climate.
| Material | Cost per sq ft (installed) | Lifespan |
|---|---|---|
| 3-tab asphalt shingles | $4 – $7 | 15–20 years |
| Architectural (dimensional) shingles | $6 – $10 | 25–30 years |
| Metal (standing seam) | $14 – $22 | 40–70 years |
| Rubber/EPDM (flat roofs) | $8 – $14 | 20–30 years |
| Slate | $25 – $50 | 100+ years |
For a typical Boston triple-decker or colonial with 1,500–2,000 sq ft of roof surface, a full replacement with architectural shingles runs $12,000–$22,000 including labor, disposal, and new underlayment.
Ice dams form when heat escapes through the roof, melts snow, and the water refreezes at the cold eaves. They're common in Boston winters and can cause significant water damage. A proper roof replacement should include: adequate attic insulation, proper ventilation, and ice and water shield on the bottom 6 feet of the roof deck. If a contractor doesn't mention these, ask about them.
Many Boston triple-deckers and Victorians have flat or low-slope sections. These require different materials (EPDM rubber, TPO, or modified bitumen) and different contractors, not every roofer does flat roofs well. Ask specifically about their flat roof experience and warranties.
A complete roof replacement includes: tear-off and disposal of existing shingles, new underlayment, ice and water shield at eaves, drip edge, ventilation components, and new shingles. Ask for each of these to be itemized in the quote.
What's typically separate: gutters (a common add-on), skylights, chimney flashing replacement (though this should be inspected and replaced if needed as part of the project).
In most Boston-area municipalities, a full roof replacement requires a permit. A contractor who says permits aren't required for a full tear-off and replacement is either wrong or trying to cut corners. Permitted work is inspected, that protects you.
If your roof is under 15 years old and has localized damage, repair may make sense — $500–$3,000 for patching and flashing work. If it's over 20 years old, replacement is almost always more cost-effective than repeated repairs. Ask your contractor to show you the full roof condition before recommending repair.
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