Pierce Roofing and Siding
“When the job started the guys Ivin and Maurice showed up and were very polite and professional in getting the job done.”
Best Insulation Contractors in St. George, UT
13 contractors listed · 10 in St. George · 6 open weekends · 12 rated 4.5+ · 2 show a license
Data verified November 1, 2026
We are still growing
There are too few quality options within 15 miles, so we have expanded area of coverage to up to 60 miles from you. This includes St. George and several other cities.
Stout Roofing
“The team at Stout Roofing & Solar were exceptional -- very professional, responsive to every inquiry, and excellent at explaining the systems and options.”
Eco Insulation
“I am really happy about it!”
Idi: Insulation Distributors Inc.
“Gentlemen named Jack helped me and was more than accommodating!”
Saint George Insulation
“The builders who did our home skimped on the insulation over the garage but in St.”
Saint George Roofing Pros
“Very happy with the service they provided and highly recommend this company.”
The 13 contractors listed for St. George, UT 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: St. George, UT
10 of the 13 contractors we list are based in St. George; the other 3 serve St. George from Washington (5 mi) and Hurricane (10 mi). The contractors on this page are rated from 4.0 to 5.0 across 700 reviews; 4 have 50 or more reviews and 12 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise quality (95%), professionalism (90%) and punctuality (90%). 6 are open on Saturdays and 1 on Sundays. 2 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 5 websites of the contractors on this page at ten or more years old; the oldest dates from 2000. 4 give free estimates; 2 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for all 13 of the contractors on this page; 10 publish a contact page and 6 list a public email. 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 13 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.
American Frontier Roofing
“Very good company, nice workers and always professional!”
D. Mills Enterprises
“Dean is great to work with!”
Sealed Home Efficiency
“My rooms are finally getting the cold air to them.”
Ironman Construction
“THE general contractor that I trust.”
Northridge Roofing & Exteriors
“I am very pleased with the workmanship and professionalism of Northridge Roofing.”
Sunpro
“Goes the extra mile to get the job done right the first time!”
RH Roofing
Why these companies made our list
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