Spray Foam Insulation in Mount Penn, PA

Spray Foam Insulation in Mount Penn works on older, closely spaced homes. The borough's population jumped from 1,370 in 1920 to 3,017 in 1930, a 120.2% increase, and has stayed near 3,000 ever since, with 3,240 residents in 2020. It covers about 0.42 square miles with 1,366 housing units.

1920s housing

Homes from that era of growth usually have thin attics, empty walls and sills on stone or brick. Attic sealing, cellulose to depth, wall dense-packing and sill foam are the usual plan.

Between the mountains

Mount Penn sits in a saddle between the roughly 1,120-foot Mount Penn to the north and the 900-foot Neversink Mountain to the south, with Mount Penn Preserve above. Wind through the saddle pushes cold air into every gap.

Dense living

At roughly 7,894 people per square mile, homes are close together. Twins and rowhomes share walls, so roofs, front and back walls and sills carry most of the heat loss.

Main road

U.S. 422 Business follows Perkiomen Avenue through the center, running west into Reading and southeast toward Pottstown.

Code and zone

Pennsylvania's 2021 UCC took effect January 1, 2026. Berks County is in PHRC's Central zone and OpenEI's Zone 5A.

A typical Mount Penn job

For an older twin or rowhome, a common plan is: seal the attic floor or fill the roof cavity, foam the front and back sills, and dense-pack any frame walls after checking the wiring. Each area is priced separately.

Old-house cautions

In homes of this age we check for knob-and-tube wiring, vermiculite and chimney gaps before insulating.

Costs

HomeGuide lists an average attic job at $1,000 to $2,700 and rim joist foam at $2,000 to $2,500. Your written estimate is the price. Get a free estimate