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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon72
    Verified insulation services reviews

Verified Reviews for Insulation Service pros in Sandown, NH

*The Angi rating for Insulation Service companies in Sandown, NH 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 Sandown, NH 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 November 24, 2025

Find Insulation pros in Sandown

Avatar for Weathertight Spray Foam, LLC
Weathertight Spray Foam, LLC
4.7(
51
)
Spray Foam Insulation - Install

Serving Sandown, NH and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Sean and Dave were super on this project. They got the project done on time, their communication was excellent, and they did a high quality job."
bathroom
1
bathroom
2
kitchen

+39

Response time1 day
Recommended by97%of homeowners
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Avatar for AJ Pro Green Insulation Corp
AJ Pro Green Insulation Corp
4.9(
8
)
Batt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - InstallSpray Foam Insulation - Install

Serving Sandown, NH and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"Happy to work with this company, will definitely be reaching out again for any future insulation needs. Very professional and nice people."
Roof open cell - walls closed cell
Roof open cell - walls closed cell
Roof/Attic closed cell
Spray Foam Insulation
Spray Foam Insulation

+57

Response time2 hrs
Recommended by85%of homeowners
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Avatar for Green Way Insulation, Inc.
Green Way Insulation, Inc.
4.0(
23
)
Spray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Sandown, NH and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"William and his team did a terrific job to insulate my attic and basement rim joists with closed cell foam."
Insulation work.
Insulation work.
Insulation work
Insulation work
Insulation work.

+9

Response time2 days
Response rate91%
42 neighbors recently requested a quote
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Avatar for ABI LLC
ABI LLC
5.0(
5
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Sandown, NH and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"I could not have been more pleased by the work and the professionalism and the cost and the results. ABI was the first company to respond to my request for bids on the project. They were at the house within days of the request and were knowledgeable about putting insulation over light fixtures embedded in the ceiling. The attic did not have access from within or outside the house and they problem-solved this in a way that was a great solution. They lay down mats so as not to dirty up the carpets and stairs and they wore gear to protect themselves from the insulation. MY house was cleaner when they left than when they arrived. All of the people working on the project were professional and knowledgeable and the cost was extremely reasonable. For the first time this winter, my house feels like it can hold the heat. Looking forward to this summer, because I'm betting it will also improve my air conditioning!"
Response time12 hrs
37 neighbors recently requested a quote
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Avatar for Sav-On Insulation LLC
Sav-On Insulation LLC
4.3(
9
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Sandown, NH and surrounding areas

Approved

In business since 1973

Free estimates

Credit card accepted

"Roland was very knowledgeable about what I needed for my attic. Was kind courteous responsive and was at our house very quickly to do the job. His prices are fair and does amazing work. If I had a second attic I would book him again for it. Thank you very much"
Response time7 hrs
32 neighbors recently requested a quote
Recommended by71%of homeowners
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Avatar for Quality Insulation of Portsmouth
Quality Insulation of Portsmouth
5.0(
2
)
Spray Foam Insulation - InstallBlown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Sandown, NH and surrounding areas

Approved (Corporate)

In business since 1975

Free estimates

Credit card accepted

"Quality insulation really lived up to their name! We had a great experience from start to finish. Joe, our salesman was super responsive and knowledgeable during the process. The installation specialists were professional and tidy. I would definitely recommend them to anyone that is in need of insulation."
PHOTOS
PHOTOS
PHOTOS
PHOTOS
Response time2 days
19 neighbors recently requested a quote
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Avatar for NH1 INTERIOR CONTRACTING L.L.C.
NH1 INTERIOR CONTRACTING L.L.C.
5.0(
4
)
Batt, Rolled or Reflective Insulation - Install or Upgrade

Serving Sandown, NH and surrounding areas

Approved

In business since 2025

Free estimates

Small jobs welcome

"Dustin and Mike did a great job for us! They came when they said they would, they were very professional start to finish and their price was more than fair."
Renovation job
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Avatar for Freedom Framing and More, LLC
Freedom Framing and More, LLC
4.3(
14
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Sandown, NH and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Matthew @ Freedom Framinging was thorough, professional and tidy. Would definitely use him again."
Before
During
Wrapping up
Finished
Prep

+34

Response time2 days
Response rate95%
Recommended by84%of homeowners
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Avatar for Jimenez Drywall Construction
Jimenez Drywall Construction
5.0(
1
)
Spray Foam Insulation - InstallBlown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Sandown, NH and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

Jimenez Drywall Construction is a Family owned and operated Company. Has been recognized as the most dependable company In New England. We provide quality work to all our clients. Whatever you have in mind our professional worker will make it come to life!

UPS FACILITY
UPS FACILITY
UPS FACILITY
ACUSTICAL CEILING
ACOUSTICAL CEILING

+24

Response time4 hrs
17 neighbors recently requested a quote
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Showing 1-10 of 72
Insulation questions, answered by experts

While insulation is required for all exterior walls in a house, it is not typically required for interior walls. Local and state building codes mandate that new construction homes have adequate insulation in exterior walls and ceilings to suit the local climate.

However, there are several benefits to adding insulation to interior walls. It is excellent for sound-dampening between rooms and can help with temperature control by maintaining a regulated temperature in specific rooms and lowering heat transfer between adjacent areas. Insulating interior walls can also contribute to the overall energy efficiency of your home.

To cover your HVAC ducts and air vents during construction, use plastic sheets or drop cloths secured with painter's tape. Be sure to cover all supply vents on your floors and walls, as well as the larger HVAC return vent, which is typically on the ceiling. While canvas drop cloths can also be used, they may not catch all the fine dust. It is crucial to shut off your HVAC system or at least the zone where construction is happening. Running the system with vents sealed can put significant strain on the blower motor and air handler. For additional dust containment, you can also hang plastic sheets over doorways to separate the construction area from the rest of your home.

Yes, covering exposed wires is necessary for several important reasons. Exposed electrical wires pose significant risks, such as electrical shocks, fires, short circuits, and potential damage to your home’s electrical system. By properly insulating and protecting the wires, you can minimize the potential for accidents, prevent electrical fires, and ensure your electrical system stays intact. 

While fiberglass is dangerous to work with, it’s a perfectly safe material once it’s installed. If you’re tackling the installation yourself, make sure you take the proper safety precautions and wear the right gear to avoid skin and eye irritation and lung complications. Working with a professional insulation company can mitigate these risks.

Periodic checks for moisture or pest issues ensure consistent performance.

The Sandown, NH 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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