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  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon61
    Verified insulation services reviews

Verified Reviews for Insulation Service pros in Williamstown, NY

*The Angi rating for Insulation Service companies in Williamstown, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

*The HomeAdvisor rating for Insulation Service companies in Williamstown, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

Last update on December 14, 2025

Find Insulation pros in Williamstown

Secure Seal

4.91(
106
)

Secure Seal

4.91(
106
)
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

Currently providing driveway and parking lot sealing. Secure Seal is a family owned and operated business with 21 years experience. We have neighbor group discount rates. We prepare surface properly. Our sealer is top of the line, not watered down. We are very neat. No sealer on garage, walkways, house, etc.

"No one does it better than Scott! I’ve been a long time customer, I’ve never seen better quality, and that’s a fact!"

Charlene S on October 2021

Currently providing driveway and parking lot sealing. Secure Seal is a family owned and operated business with 21 years experience. We have neighbor group discount rates. We prepare surface properly. Our sealer is top of the line, not watered down. We are very neat. No sealer on garage, walkways, house, etc.

"No one does it better than Scott! I’ve been a long time customer, I’ve never seen better quality, and that’s a fact!"

Charlene S on October 2021

Avatar for New York Sash

New York Sash

4.84(
118
)

New York Sash

4.84(
118
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

New York Sash consistently provides homeowners with products that not only improve the appearance and value of their home, but saves them energy usage (and energy dollars) as well! Not only do we provide and install these products, we also stand behind them with a full service department to honor all warranty and guarantee promises made. This gives our customers complete peace of mind. Additionally, all of our installers are certified by the Occupational Safety and health Administration (OSHA) and certified in Lead Safety through the Environmental Protection Agency. New York Sash is fully insured. We are safe on the job and with your home.We also have a state-of-the-art Idea & Design Center with many product options on display, to allow homeowners to look and feel what the products would be like installed in their home.

"Brian, Bryan and Matt were our crew and were excellent. They were efficient, friendly and kind to me and my kids who liked to watch them work. The windows they completed look perfect. There was one window that they had to reschedule due to the space being very un-level. They ordered a brand new window and scheduled a new date to complete the job for the last window. They called as they were finishing up to explain everything. I also appreciated that I didn't have to be present for them to complete the job so that I was able to go to work."

Mallory C on May 2022

New York Sash consistently provides homeowners with products that not only improve the appearance and value of their home, but saves them energy usage (and energy dollars) as well! Not only do we provide and install these products, we also stand behind them with a full service department to honor all warranty and guarantee promises made. This gives our customers complete peace of mind. Additionally, all of our installers are certified by the Occupational Safety and health Administration (OSHA) and certified in Lead Safety through the Environmental Protection Agency. New York Sash is fully insured. We are safe on the job and with your home.We also have a state-of-the-art Idea & Design Center with many product options on display, to allow homeowners to look and feel what the products would be like installed in their home.

"Brian, Bryan and Matt were our crew and were excellent. They were efficient, friendly and kind to me and my kids who liked to watch them work. The windows they completed look perfect. There was one window that they had to reschedule due to the space being very un-level. They ordered a brand new window and scheduled a new date to complete the job for the last window. They called as they were finishing up to explain everything. I also appreciated that I didn't have to be present for them to complete the job so that I was able to go to work."

Mallory C on May 2022

Avatar for Horizon Contracting Co

Horizon Contracting Co

4.96(
24
)

Horizon Contracting Co

4.96(
24
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are a full service, Interior and Exterior Painting, Asbestos, Lead and Mold removal Company. Specializing and catering to the Residential customer. We also provide service in the Commercial and Industrial work environments. In addition, We are an Insulation company, blown-in, fiberglass, pipe insulation and boiler blankets. We have been in business since 1986, serving the entire state of NY. Estimates are free within a 50 mile radius of our office. I welcome the opportunity to provide you with quality workmanship at a reasonable price.

"After reading many positive reviews on Angieslist I used the site to reach out to the company. Michael contacted me within the hour. He was patient and professional. He allowed me to send him pictures of the ceiling tiles I was concerned about and offered his expertise and explained my options without any consultation fee. I would highly recommend"

Morgan J on March 2019

We are a full service, Interior and Exterior Painting, Asbestos, Lead and Mold removal Company. Specializing and catering to the Residential customer. We also provide service in the Commercial and Industrial work environments. In addition, We are an Insulation company, blown-in, fiberglass, pipe insulation and boiler blankets. We have been in business since 1986, serving the entire state of NY. Estimates are free within a 50 mile radius of our office. I welcome the opportunity to provide you with quality workmanship at a reasonable price.

"After reading many positive reviews on Angieslist I used the site to reach out to the company. Michael contacted me within the hour. He was patient and professional. He allowed me to send him pictures of the ceiling tiles I was concerned about and offered his expertise and explained my options without any consultation fee. I would highly recommend"

Morgan J on March 2019

Avatar for Comfort Windows

Comfort Windows

4.69(
139
)

Comfort Windows

4.69(
139
)
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers

Comfort Windows is Upstate NY's Premier Home Improvement Company. Local experts for windows, doors, bathrooms, basements, insulation, sunrooms, siding and more.

"It was a great experience. The salesperson was very knowledgeable and professional. The work was done just as it was proposed."

Melinda G on May 2019

Comfort Windows is Upstate NY's Premier Home Improvement Company. Local experts for windows, doors, bathrooms, basements, insulation, sunrooms, siding and more.

"It was a great experience. The salesperson was very knowledgeable and professional. The work was done just as it was proposed."

Melinda G on May 2019

Avatar for Isaac Heating & Air Conditioning

Isaac Heating & Air Conditioning

4.67(
95
)

Isaac Heating & Air Conditioning

4.67(
95
)
Customers say: True professional
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

Since 1945, Isaac Heating and Air Conditioning has diligently, grown and evolved to meet the needs of our many valuable customers. We focus on Safety, Uncompromising Integrity, Accountability, Excellence, Outstanding Service and Balance.

"No they broke my mothers stairs and scratched her floor and I have them on the ring saying that they did it but call after call no response and they where b******* about the sales person the whole time they where there"

Joel W on May 2025

Since 1945, Isaac Heating and Air Conditioning has diligently, grown and evolved to meet the needs of our many valuable customers. We focus on Safety, Uncompromising Integrity, Accountability, Excellence, Outstanding Service and Balance.

"No they broke my mothers stairs and scratched her floor and I have them on the ring saying that they did it but call after call no response and they where b******* about the sales person the whole time they where there"

Joel W on May 2025

Avatar for Michael C. Graham & Son Construction

Michael C. Graham & Son Construction

4.80(
59
)

Michael C. Graham & Son Construction

4.80(
59
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

Michael C. Graham & Son Construction is a Syracuse, New York family owned construction company. Michael C. Graham & Son Construction has established a residential construction division, offered general contractor and developed a roofing service for its Syracuse clients in Onondaga County. Michael C. Graham & Son Construction has become Syracuse local construction favorite! Lifetime Warranty - Free Roofing & Siding Estimates.

"100% satisfied! Michael and his company are very professional, reasonable and fair priced, one day installs (tear off job) with the hardest working crew we have ever seen. By the end of the day the roof looked amazing and clean-up was meticulous! Highly recommended"

Art W on May 2023

Michael C. Graham & Son Construction is a Syracuse, New York family owned construction company. Michael C. Graham & Son Construction has established a residential construction division, offered general contractor and developed a roofing service for its Syracuse clients in Onondaga County. Michael C. Graham & Son Construction has become Syracuse local construction favorite! Lifetime Warranty - Free Roofing & Siding Estimates.

"100% satisfied! Michael and his company are very professional, reasonable and fair priced, one day installs (tear off job) with the hardest working crew we have ever seen. By the end of the day the roof looked amazing and clean-up was meticulous! Highly recommended"

Art W on May 2023

Avatar for Onondaga County Construction

Onondaga County Construction

4.58(
73
)

Onondaga County Construction

4.58(
73
)
Customers say: Quick response
26 years of experience

Whether you have a slate roof, metal, rubber, wood shingle, or asphalt roof, our experts are here to help. For the highest quality in roofing contractor services, look no further than Onondaga County Construction. Very reliable service, fully insured, owner always on site.

Whether you have a slate roof, metal, rubber, wood shingle, or asphalt roof, our experts are here to help. For the highest quality in roofing contractor services, look no further than Onondaga County Construction. Very reliable service, fully insured, owner always on site.

Avatar for Renewal by Andersen of New Jersey - New York Metro

Renewal by Andersen of New Jersey - New York Metro

4.69(
187
)

Renewal by Andersen of New Jersey - New York Metro

4.69(
187
)
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

Renewal by Andersen of Cranford, NJ is proud to serve the window replacement and patio door replacement needs of the Cranford area. We are the window replacement division of Andersen Windows, drawing on the Andersen tradition of over 110 years of quality, innovation and craftsmanship. Our turnkey process begins with a call from you and includes a respectful in-home sales consultation, custom-manufacturing of replacement windows to precisely fit your home and installation by a dedicated team of professionals. Best of all, we stand behind our products and installation with one of the strongest warranties in the Cranford window replacement business.

"1) Renewal by Anderson doesn't show up on time. 2) Renewal by Anderson doesn't provide correct instructions for the homeowner. 3) Renewal by Anderson cannot measure correctly. 4) Renewal by Anderson cannot install moulding correctly. I work from home and can't "stand-by" waiting for a crew to show up late. I had asked what had to be done prepping for their arrival and I removed all window coverings and shades and anything within 3 feet of the windows. Pets were secured. I was told nothing on the OUTSIDE had to be removed. Well I had to remove the 3 flower boxes from the OUTSIDE of the front windows. Two different people from Renewal by Anderson measured the windows but the oak moulding was incorrect. Take a look at the photos of when they finally installed the oak moulding. The windows from Renewal by Anderson are great...everything else they do is terrible."

David G on January 2023

Renewal by Andersen of Cranford, NJ is proud to serve the window replacement and patio door replacement needs of the Cranford area. We are the window replacement division of Andersen Windows, drawing on the Andersen tradition of over 110 years of quality, innovation and craftsmanship. Our turnkey process begins with a call from you and includes a respectful in-home sales consultation, custom-manufacturing of replacement windows to precisely fit your home and installation by a dedicated team of professionals. Best of all, we stand behind our products and installation with one of the strongest warranties in the Cranford window replacement business.

"1) Renewal by Anderson doesn't show up on time. 2) Renewal by Anderson doesn't provide correct instructions for the homeowner. 3) Renewal by Anderson cannot measure correctly. 4) Renewal by Anderson cannot install moulding correctly. I work from home and can't "stand-by" waiting for a crew to show up late. I had asked what had to be done prepping for their arrival and I removed all window coverings and shades and anything within 3 feet of the windows. Pets were secured. I was told nothing on the OUTSIDE had to be removed. Well I had to remove the 3 flower boxes from the OUTSIDE of the front windows. Two different people from Renewal by Anderson measured the windows but the oak moulding was incorrect. Take a look at the photos of when they finally installed the oak moulding. The windows from Renewal by Anderson are great...everything else they do is terrible."

David G on January 2023

Avatar for Holley Environmental & Weatherization LLC

Holley Environmental & Weatherization LLC

5.00(
8
)

Holley Environmental & Weatherization LLC

5.00(
8
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Holley Environmental & Weatherization LLC in Rochester specializes in mold remediation, water restoration, and attic & basement air sealing. Our team is dedicated to providing top-notch services that improve the comfort and efficiency of your home. Contact us today for all your home project needs.

"Very friendly. He did a nice job! He was helpful in many ways."

Maj p on March 2021

Holley Environmental & Weatherization LLC in Rochester specializes in mold remediation, water restoration, and attic & basement air sealing. Our team is dedicated to providing top-notch services that improve the comfort and efficiency of your home. Contact us today for all your home project needs.

"Very friendly. He did a nice job! He was helpful in many ways."

Maj p on March 2021

Avatar for Standard

Standard

5.00(
8
)

Standard

5.00(
8
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Let Standard help reduce your home heating costs with new insulation, more efficient heating and cooling solutions, and free HVAC service calls for homeowners in the Mohawk Valley. Founded in 1928 and based in Marcy, New York, Standard is the oldest and largest insulation companies and HVAC contractors in the region, offering full-service installation and repair of home heating and cooling systems. We’ve helped homeowners save thousands by participating in assistance programs such as EmPower New York, NYS Clean Heat, and Comfort Home. Schedule a free consultation and learn how you can save money today!

Let Standard help reduce your home heating costs with new insulation, more efficient heating and cooling solutions, and free HVAC service calls for homeowners in the Mohawk Valley. Founded in 1928 and based in Marcy, New York, Standard is the oldest and largest insulation companies and HVAC contractors in the region, offering full-service installation and repair of home heating and cooling systems. We’ve helped homeowners save thousands by participating in assistance programs such as EmPower New York, NYS Clean Heat, and Comfort Home. Schedule a free consultation and learn how you can save money today!

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FAQs for insulation service projects in Williamstown, NY

When choosing a professional insulation installer, consider asking these questions to determine the best fit.

  • Will you address air leaks in my house?

  • Can you provide an R-value (heat resistance) fact sheet?

  • What kind of insulation will work best for my home?

  • How do you handle signs of a water leak?

  • Are you licensed and insured?

  • Can you provide customer references?

The best type of insulation for your home depends on what you need, so the answer will depend on your specific situation. If you’re building a house, structural panels are easy to install during the building process in addition to being the most energy efficient type. If you live in a warm climate, reflective insulation may benefit you more as it costs less than other insulation types. And for standard attics, loose-fill, spray foam, or blown-in insulation work well.

If you plan to heat or cool your garage, you’ll need to insulate the garage ceiling. Insulating your garage ceiling will make your garage much more energy efficient and save on heating and cooling costs. Not only does insulation make your garage more energy efficient, it helps reduce noise and can extend the life of your garage roof. You can use fiberglass, cellulose, mineral wool, or spray foam insulation for this project.

In some cases, you may not have enough insulation to properly regulate your home’s temperature. Watch for a few signs your home needs more insulation, such as:

  • High heating and cooling bills

  • Uncomfortable room temperatures 

  • Ice dams on the edge of your roof 

  • Roof leaks

  • Cold floors and walls

  • Freezing pipes

  • Temperature fluctuations

  • Visibly low insulation

  • Noise problems

  • Pest problems

On average, insulating an attic costs about $2,500, ranging from $1,500 to $3,500, depending on the insulation type, amount, and your attic’s accessibility. Additional cost factors include sealing air leaks, removal or replacement of insulation, and inspections. Types of insulation include:

  • Blown-in: $1–$4 per square foot

  • Spray foam: $2–$5 per square foot

  • Batt: $2–$4 per square foot

  • Structural insulated panels: $4–$7 per square foot

  • Loose-fill: $2–$5 per square foot

  • Reflective: $0.50–$1.50 per square foot

The Williamstown, NY homeowners’ guide to insulation services

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

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