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Top-Rated Insulation pros in Alexander - Updated Nov 2026

Avatar for USA Insulation of Buffalo
USA Insulation of Buffalo
4.4(
15
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Alexander, NY and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"I hired USA insulation to insulate my home, and I could not have been happier. From the first time I called, and spoke to Liz to get a quote, to the finished product. I was nothing but satisfied. All my questions were answered. They were efficient, clean, and professional!"
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+3

Response time12 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Williamstown Construction Superior Insulation
Williamstown Construction Superior Insulation
3.5(
12
)
Spray Foam Insulation - Install

Serving Alexander, NY and surrounding areas

Approved

In business since 1983

Free estimates

Credit card accepted

"They are excellent. as matter of fact Jim came over to my house and he found a significant problem in my roofing and for a significant amount he was able to do my roofing and insulation."
Response time1 day
Response rate90%
14 neighbors recently requested a quote
Avatar for Stellar Roofing, Inc.
Stellar Roofing, Inc.
4.5(
199
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Alexander, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Credit card accepted

"They did a whole rebuild in one day , I had 4to 7ft of blow foam On each wall and ceiling of my attic they tore it out and put a whole New roof plus ventilation in a day! I was so impressed they were kind they even patched where my roof was leaking since my apt was a week or so out. I worked with Micheal Benaquist who was absolutely phenomenal. He made me feel safe and secure and was knowledgeable on any questions I asked. From financial options to helping me understand the roofing materials. I would recommend them to anyone. They are worth the extra few bucks!!!"
New Roofs
New Roofs
New Roofs
New Roofs
Response time1 day
399 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Town Insulation
Town Insulation
4.5(
36
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Alexander, NY and surrounding areas

In business since 1975

Free estimates

Emergency services offered

"They weren't too bad but I think they could have done a better job. They did a couple of different jobs. I own rental property but all the 3 buildings are on the same piece of property where I live at. So far it seems they've done the trick as far as solving problems like pipes freezing out, that kind of stuff. Unfortunately my house itself can't be insulated any more than it already is but what I was trying to get at, like trying to get rid of dross and making sure that doors seal up well, things like that, I think they could have done a little bit better. If their prices are as reasonable as right now, I'd probably use them again. They could have tried harder to insulate my apartment. There are places they could have done it because we had a section of the house redone. Our kitchen was remodeled and they could have done it but they didn't. They could have been more attentive to detail. My house is not a new house but its also not a real old house either, it was built in the 40's so something needed to be looked at to make sure that the draft was kept out not just from the windows and walls that were insulated but also the door, the door jambs, making sure the door fits tight and all that kind of thing."
Recommended by91%of homeowners
Mr. Sprayfoam, Inc.
4.5(
27
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Alexander, NY and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"Mark was very professional and gave a complete explanation of the estimate and work involved. while only one man showed up on the date scheduled for insulation, he completed the exterior walls foam insulation work including the interior basement rim in the day as promised and was very courteous and thorough. I have noticed quite an improvement in the warmth of my home and especially since we have had 2 very cold weeks since Christmas. negative degrees! I am very pleased with the company and the work."
Response time2 days
Recommended by95%of homeowners
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Insulation FAQs, answered by experts

Polyisocyanurate foam, or polyiso for short, has the highest R-value per square inch: 6.5 to 6.8. Polyiso is a rigid foam that comes with a reflective foil on both sides to serve as a radiant barrier. Given its high R-value, rigid foam is usually meant for foundations and basement walls.

Spreading tin foil over your windows works similarly to radiant barrier insulation, but not as well. It will reflect some of the sunlight that would otherwise come through the glass and warm up the inside of your home, so it might help a little to keep your home cool in the summer. However, the appearance isn’t preferable to blinds or drapes that can offer the same benefits. You might also consider tinting your windows instead, which is a more aesthetically pleasing change that can still block a good portion of the solar heat coming through your windows.

A vapor barrier keeps moisture out of the crawl space, while insulation reduces the amount of unconditioned air—and sometimes moisture—that enters the space. Coupling a vapor barrier with insulation can help prevent humidity and related moisture damage in a crawl space while also making your home more energy-efficient. Just be sure to use insulation that won’t get damaged from moisture, like rigid foam board or expanding spray foam insulation.

On average, insulating an attic costs about $2,500, with a typical range of $1,500 to $3,500. The final price often depends on the attic's size, with costs generally falling between $1 to $3 per square foot. For example, insulating a 1,800-square-foot attic would likely cost between $1,800 and $5,400.

If the project involves removing old insulation, this can add an average of $900 to the total cost, bringing a full removal and reinsulation project to around $3,000.

Several factors influence the overall cost:

  • Insulation Type: Prices per square foot vary significantly by material.

  • Reflective: $0.50–$1.50

  • Blown-in: $1–$4

  • Batt: $2–$4

  • Loose-fill: $2–$5

  • Spray foam: $2–$5

  • Structural insulated panels (SIPs): $4–$7

  • Project Complexity: Factors like sealing air leaks, poor attic accessibility, and required inspections can add to the cost.

  • Removal Issues: The discovery of mold, asbestos, or pests during the removal of old insulation can substantially increase the price.

Glass fibers are often used in HEPA filters because of their high efficiency, durability, and thermal stability. Some HEPA filters are made with synthetic fibers, but they may not be as effective. While there is some fiberglass shedding, as long as the HEPA filter is intact and not cut open, the amount of fiberglass released by a HEPA filter is well below the breathable particulate matter.

The Alexander, NY homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.