Insulation in Eastham, Massachusetts

Eastham is in Eversource territory, so homeowners qualify for the full Mass Save program. Start with the no-cost Mass Save Home Energy Assessment, which finds your main heat-loss points and checks for knob-and-tube wiring or, in pre-1981 attics, vermiculite that may contain asbestos. Mass Save then typically covers 75-100% of approved insulation and air-sealing costs, with 100% for income-eligible households, plus the 0% Mass Save HEAT Loan up to $25,000 for the homeowner share.

Insulation in Eastham generally needs no standalone building permit, but the contractor should hold a Home Improvement Contractor (HIC) registration, with a Construction Supervisor License (CSL) for related structural work. Mass Save incentives require participating, approved contractors. Spray foam must meet Massachusetts fire and ignition-barrier code, which matters in the vented crawl spaces common in Cape homes. Many Eastham lots sit in coastal flood zones, so confirm any flood-zone detailing for crawl-space or below-grade insulation with the town building department.

Eastham is on the Outer Cape, where insulation pricing runs above mainland eastern Massachusetts because of travel distance and seasonal scheduling. As of recent cycles, attic insulation typically runs $1,500-$4,000, dense-pack wall insulation $2,000-$6,000, and air sealing $300-$1,500, with spray foam higher. The key factor for Eastham: as an Eversource town it's Mass Save eligible, so the 75-100% incentive can drive out-of-pocket on approved attic and wall work down to near zero.

Eastham is an Outer Cape town in Barnstable County with about 5,724 year-round residents but roughly 6,393 housing units — more homes than people, reflecting the heavy seasonal and second-home market on this stretch of Cape Cod. The median construction age is near 50 years.

For insulation, much of Eastham's stock began as summer housing never built for year-round comfort: thin attic insulation, uninsulated walls, vented crawl spaces, and leaky rim joists are common. As more of these homes convert to year-round use, attic insulation and air sealing are the work that makes them livable and affordable to heat.