Spray Foam Insulation in Dedham, MA

Spray Foam Insulation in Dedham covers a town shaped by water. Wikipedia notes that Mother Brook, dug in 1639, links the Charles and Neponset rivers and was the first man-made canal in North America, and that the Riverdale neighborhood is an island surrounded by the Charles River and Long Ditch. Dedham averages about 62 inches of snow and 48.7 inches of precipitation a year.

Damp ground

With two rivers, a canal and plenty of low ground, some Dedham basements run damp. Closed-cell foam on the rim joist and foundation walls keeps humid air off cold surfaces. If water actually comes through the wall, drainage work comes first.

Snow and ice dams

At about 62 inches of snow a year, Dedham gets noticeably more than downtown Boston. Leaky attics turn that snow into ice dams. Sealing and insulating the attic floor is the fix.

Typical houses

Dedham has older Colonials and Victorians near the center, plus many mid-century Capes and ranches. Older houses need walls, attics and rim joists addressed; mid-century houses mostly need kneewalls, attic sealing and rim joists.

Costs

HomeGuide lists typical attic insulation at $1,000 to $2,700 and rim joist foam at $2,000 to $2,500 nationally. The written estimate is the price.

Mass Save

Mass Save lists no-cost assessments for one- to four-unit homes. Start there if you want the program's incentives.

Rooms over garages and porches

Mid-century Dedham homes often have a room over a garage or an enclosed porch. Those floors sit on cold air. Foam in the floor framing seals and insulates them, and over a garage it also blocks fumes.

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