Builders & Management Plus
“They gave me the best price by far on my roof and gutters and didn't try to add unnecessary costs like other companies”
Best Insulation Contractors in Allentown, PA
15 contractors listed · 5 in Allentown · 3 open 24/7 · 8 open weekends · 11 rated 4.5+
Data verified November 2, 2026
J.o.n. Construction
“Our home was in need of some high quality roof repairs, and you guys delivered.”
Custom Weatherization LLC
“I did a lot of research about this before pulling the trigger and can ALSO tell you that their pricing is very fair.”
ASI Acoustical Spray Insulators
“When they first sprayed the insulation, we almost left it the way it was, it looked like the Batcave.”
Big League Construction Services
Holencik Exteriors
“Scott was straight to the point and showed us our choices, very easy to set everything up.”
The 15 contractors listed for Allentown, PA insulate attics, walls, crawl spaces and rim joists. Details under each one about materials, hours and the services advertised are copied from the company's own site; star ratings and comments come from public reviews.
Area overview: Allentown, PA
5 of the 15 contractors we list are based in Allentown; the other 10 serve Allentown from towns including Coplay (5 mi), Bethlehem (6 mi) and Whitehall Township (5 mi). 14 of the contractors on this page have a rating, from 4.1 to 5.0 across 1,605 reviews; 5 have 50 or more reviews and 11 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise responsiveness (96%), professionalism (91%) and punctuality (87%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "quality". 3 are open around the clock; 8 are open on Saturdays and 4 on Sundays. 4 show a license on their websites; 2 list staff certifications (BPI, GAF and HAAG) and 3 have a BBB rating of A or A+. Domain records put 10 websites of the contractors on this page at ten or more years old; the oldest dates from 2003. 3 offer emergency call-outs; 5 offer financing or payment plans; 6 give free estimates; 4 are family- or locally-owned and 3 list coupons or special offers. 1 has Spanish-speaking staff. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
How many listings here have a website?
A website is on file for 13 of the 15 contractors here. Use it to see which materials they actually install, since a firm that only sprays foam will recommend foam. A contractor with no site is not automatically worse, but you will have to ask on the phone what the site would have told you.
East Penn Roofing
“It was a great experience with a very professional team from start to finish and our large roof was replaced in just one day-WOW!”
Home Shield Pro's Roofing & Siding
“They were very professional and polite, great communication on what my roof/chimney repair entailed, they had quick responses when I asked questions and kept me informed with updates.”
Lehigh Valley Roofers
“They didn't charge me in advance for product they “might use” but included it in the quote as additional if needed.”
Lehigh Valley Insulation
“I have always used LV Insulation for my home and Business.”
True Management LLC
“James and his team insulated a home in Hellertown for me.”
Advanced Specialty Contractors
“I couldn't find the dog I wanted to anywhere and then I went to the pet dative and it was amazing”
Sellair
Kovacs Roofing & General Contractor
“They happily handled these things with no issue and modified my bill accordingly- I'm so glad it all got done!”
Belisaire Painting & Bathtub Refinishing
“Tim was great and on time and took care of our issue quickly and with care.”
Why these companies made our list
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