Weather Tight Corporation
“We have used Weathertight on a number of occasions for window replacement and they have earned a five star rating from us.”
Best Insulation Contractors in West Allis, WI
15 contractors listed · 5 in West Allis · 3 open 24/7 · 6 open weekends · all 15 rated 4.5+
Data verified October 20, 2026
A Custom To
“Cannot wait for rain again, to see what an improvement I will have thanks to their craftmanship!”
Weatherpro Exteriors
“Between the original scope of work only being the house, then with a quick addition of "let's add the garage while they're here", the project manager Brad made that happen as if nothing was an issue.”
Alois Roofing & Sheet Metal
“Where other companies have failed to find tougher leaks, Alois found them all!”
Green Homeowners United
“Kind, communicative, professional - we're lucky to have them in the community!”
Smart Roofing & Sheet Metal Company
“The installation team demonstrated remarkable skill, completing the project efficiently without compromising quality within 2 days and cleaned everything up.”
The 15 contractors listed for West Allis, WI 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: West Allis, WI
5 of the 15 contractors we list are based in West Allis; the other 10 serve West Allis from towns including New Berlin (4 mi), Milwaukee (5 mi) and Waukesha (11 mi). The contractors on this page are rated from 4.5 to 5.0 across 4,237 reviews; 11 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise professionalism (93%), quality (86%) and responsiveness (78%). 3 are open around the clock; 6 are open on Saturdays and 4 on Sundays. The services the contractors on this page list most often on their websites are attic insulation (3), gutters (2) and siding (2). 3 show a license on their websites; 3 list staff certifications (GAF and BPI) and 9 have a BBB rating of A or A+. Domain records put 13 websites of the contractors on this page at ten or more years old; the oldest dates from 1999. 3 offer emergency call-outs; 6 offer financing or payment plans; 9 give free estimates; 5 are family- or locally-owned and 4 list coupons or special offers. 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 all 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.
Anderson Home & Foundation Inspection LLC
“He has incredible credentials and does the most thorough and detailed inspection I've ever seen.”
Guardian Home Improvements
“Josiah was great I would recommend him to anyone very professional thanks again Josiah :)”
Thermal Comfort
“They were here on time, great guys, went through the project and we're willing to answer any questions.”
Infinity Exteriors
“Once the claim was approved Logan walked us thoroughly through our options multiple times to ensure we were clear on what the project would entail and what our material options were.”
Endurance Exteriors
“He just wants to have the best for everyone involved in your project.”
Retrofoam
“Dave was honest, practical, asked great questions, and gave me multiple options for how to cost effectively improve the energy efficiency of my home.”
Abby Home
“The Abby Windows crew was fantastic to accommodate to some of our needs.”
Intec WI
“I had insullation added to my attic and its made a huge difference.”
BCI Exteriors
“Some minor landscaping damage which was resolved to our satisfaction and they came back to fix a few things that I noticed after the job was completed.”
Why these companies made our list
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