Top-rated spray foam insulation pros.

Get matched with top spray foam insulation pros in Knox, IN

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Spray foam insulation pros in Knox

Avatar for D&N Insulation
D&N Insulation
5.0(
9
)

Serving Knox, IN and surrounding areas

Approved

In business since 1993

Free estimates

Emergency services offered

"D&N Insulation did a great job for me. They were very professional and personable and knowledgeable. The job was done in a timely manner. I highly recommend them and would call them again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Kokomo Spray Foam LLC
Kokomo Spray Foam LLC
5.0(
5
)

Serving Knox, IN and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!\n

48 neighbors recently requested a quote
Avatar for Airtite Insulation, LLC
Airtite Insulation, LLC
New to Angi

Serving Knox, IN and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

Here at AirTite Insulation, we provide quality service at the highest level. We treat each and every project here at AirTite as if it were our own and take great pride in making sure we have done everything in our power to insure a happy satisfied customer. You can expect excellence and professionalism in all aspects of our work. With over 20 years of experience we can guarantee you will be satisfied with our craftsmanship and customer service.

Response time4 days
Avatar for USA Insulation North Central Indiana
USA Insulation North Central Indiana
4.2(
29
)

Serving Knox, IN and surrounding areas

In business since 2019

Free estimates

Warranties offered

"USA Insulation did a excellent job in insulation the whole house. Great crew that really worked well together. We will recommend this company to family and friends. Home is warmer and outside noise is a lot less."
1905 HOME
INSULATION JOB
Install
Install
Install

+4

Response time1 day
Response rate95%
Recommended by83%of homeowners
Avatar for USA Insulation North Central Indiana
USA Insulation North Central Indiana
5.0(
4
)

Serving Knox, IN and surrounding areas

In business since 2019

Free estimates

Credit card accepted

"The owner of USA Insulation, Mark Owens, and his associate spent over an hour inspecting every nook and cranny of my 2800 Sq. Ft. two story home. After which, Mark spent a lot more time reviewing the current situation regarding my home's insulation. Then he thoroughly explained what needed to be done to correct the situation I was so impressed with his knowledge and professionalism and explanation of options. In the end, I decided that the one or two more years I intended to be in this home was not worth the investment. I suggested a partial and less expensive fix that would have resulted in a contract for him. Instead of taking my money, he explained why this would not fix the issue in the coldest room in the house and why it would not be a wise investment for me. I have great respect for his integrity and would recommend him as a professional of the highest caliber. If I should decide not to move in a few years, I will be calling USA Insulation, Mark Owens."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

Recommended by100%of homeowners
Avatar for Crawlspaces/Basement Waterproofing Solution
Crawlspaces/Basement Waterproofing Solution
4.2(
29
)

Serving Knox, IN and surrounding areas

In business since 1999

Free estimates

Credit card accepted

"Their service went very well. They came out for the estimate very promptly and the price was great. They showed up on time for work and fixed everything. When I pointed out something they missed, they stayed late to fix the issue. We have had rain since and have had no issues since the repair."
Before...
After...
Recommended by94%of homeowners
Avatar for American Basement Solutions
American Basement Solutions
4.3(
46
)

Serving Knox, IN and surrounding areas

In business since 1992

Credit card accepted

"It was a small job. They sealed the vents to the crawlspace, then, since there was already solid insulation panels on the walls, put a vapor/moisture barrier, in the form of a tarp, 4 feet wide and as long needed, completely around the crawlspace. It was then sealed to the walls with "nails" and adhesive. This seals the wood frame of the house from the 'Outside", the ground, which is the floor of the crawlspace. A 20 mil thick, quite heavy, "floor" was installed, also in the form of a tarp, It went up the walls about 3 feet and was taped to the 'tarp" on the walls, using a tape made for this application. The piers were wrapped with the same stuff and taped to seal the inside from the outside. the "floor" is also a vapor/moisture barrier, but, heavy enough to walk on if needed. This basically makes the crawlspace another room, rather than the outside. Our house is one year old and was already getting mold on the floor joists. Since the air in the crawlspace will now be heated in the winter and cooled in the summer, just like the rest of the house, the mold and cold (52 degrees) floors we experienced last winter will hopefully be eliminated. We shall see when dumb winter gets here."
Additional Photos
Additional Photos
Additional Photos
Recommended by85%of homeowners
Showing 1-10 of 23
FAQs for spray foam insulation projects in Knox, IN

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.