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Top-Rated Spray foam insulation pros in Cary - Updated Nov 2026

Avatar for USA Insulation Raleigh-Durham
USA Insulation Raleigh-Durham
4.9(
14
)
Insulation - Install or Upgrade

Serving Cary, NC and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"Customer response and service is excellent. I highly recommend. They have great communication and helped educate me about insulation and their process."
USA Insulation Raleigh-Durham
Response time1 day
37 neighbors recently requested a quote
Recommended by57%of homeowners
Avatar for Triangle Radiant Barrier
Triangle Radiant Barrier
4.8(
155
)

Serving Cary, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"They were great at explaining the many options they offer. At first I was overwhelmed. They patiently explained why I needed this and that option. We had our attics insulated and our Crawlspace dry iced to get rid of mold. Then we went back with white foam board with lights running throughout the Crawlspace. A dehumidifier in Crawlspace is preventing mold from reforming. They were wonderful and professional. 2 thumbs up!"
Radiant Barrier on Attic Floor
New Radiant Barrier
Radiant Barrier installed under rafters
Old, uneven, fallen, deteriorated insulation
Radiant Barrier Attic Stair Cover

+29

Response time1 day
36 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for SprayFoam Insulation of North Carolina
SprayFoam Insulation of North Carolina
3.6(
48
)

Serving Cary, NC and surrounding areas

Approved

In business since 2003

Free estimates

Warranties offered

"Spray Foam Insulation of North Carolina was quick to respond to my initial inquires and they were quick to provide me a quote. I have a 30' x 40' x 12' high metal building sprayed with closed cell foam 2" thick. So far, it seems pretty good. Before (in month of March cold to cool temps) the metal siding would be hot after the sun would shine on it and now it is not. The vast inside building temperatures swings have been greatly reduced. I will have to wait until this summer to see how it handles summer temps and humidity. I plan on having a dehumidifier and window A/C to help maintain temps/humidity during the summer. The only negative thing is that they drop sheet metal screw all over the place. I'm surprised that I haven't gotten a flat tire yet, but other than that all was good."
Gallery
Response time3 days
23 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Insulation For All, LLC
Insulation For All, LLC
4.8(
24
)
Insulation - Install or Upgrade

Serving Cary, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Daryl and his crew knew what they were doing and completed the work in around 4 hours. They cleaned everything in the area before they left. Highly recommend them for any insulation work."
Rehab project
Metal building insulation
Rehab project
Metal building insulation
Rehab project

+29

Response time1 day
Response rate100%
16 neighbors recently requested a quote
Avatar for Spray Foam Pro LLC
Spray Foam Pro LLC
5.0(
4
)

Serving Cary, NC and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

We specialize in insulation installation and upgrades as well as roofing repair. Each of our employees boasts over 20 years of industry experience! We take pride in commitment to the quality of work we produce, and the long-term relationships we build with our clients. \nWe guarantee quality and complete satisfaction, featuring a 10 year warranty at no additional cost on all of our services. We set ourselves apart from our competitors by offering the highest quality of work combined with experience, guaranteed. Find another company with a lower price and we will beat the competitor’s price by 10%. Call today for a free estimate! \n

Crawlspace encapsulation
Crawlspace encapsulation
Crawlspace encapsulation
Crawlspace encapsulation
Crawlspace encapsulation

+11

Response time4 hrs
Response rate100%
34 neighbors recently requested a quote
Avatar for Evergreen Foam and Insulation
Evergreen Foam and Insulation
5.0(
2
)

Serving Cary, NC and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"Evergreen was great from start to finish! The salesman, Chris, was super helpful in answering questions and the install crew was on time, efficient, and cleaned up after themselves. Highly recommend to anyone needing spray foam or any other type of insulation."
Cathedral Dome
Dome Walls
Attic Space
Bedroom Dormer
Bedroom 1

+8

Response time2 days
Response rate100%
10 neighbors recently requested a quote
Avatar for Koons Crawl Space Solutions
Koons Crawl Space Solutions
5.0(
31
)

Serving Cary, NC and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"This company is a top notch operation. From the moment they arrived at my house for our first meeting to discuss my repair needs to their finished project completion they went above and beyond to fix and clean up what a previous company did not do properly. Their employees are hard working and very professional. The work they completed under my house of cleaning mold from under the crawl space was more than stellar, which the previous company that started left me in a mess and never completed. They installed insulation and a beautiful floor barrier. Going above and beyond was installing a dehumidifier under house for one month to ensure absolute drying of floor joist and entire area. they did this as an added precaution for me the customer which shows true customer service and what a 5 star company is all about. I cannot say enough good things about this company and Tim Koons who represents it with wisdom of the business and a professionalism that adds trust and confidence to the customer. Nancy Hill, Clayton , NC My second review for this company also goes above and beyond what any other company has offered or done for me , the customer. They installed a dehumidifier under my house for several months free of charge to insure under my house was completely dried out to ensure new insulation and mold treatment they did would not be compromised in any way due to moisture and cold weather. This company is a top notch company that puts the customer as there number one priority. They took care of all my needs and went above and beyond for me. I would highly recommend them to family and friends."
Attic insulation
Attic insulation
Crawl space insulation
Crawlspace insulation
Blown Attic Insulation

+1

Response time2 days
Response rate92%
28 neighbors recently requested a quote
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FAQs for spray foam insulation projects in Cary, NC

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.