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TRUSTED BY ALEXANDRIA, NH HOMEOWNERS

  • Average homeowner rating star icon3.8
    Average homeowner rating
  • Verified reviews icon15
    Verified insulation services reviews

Top-Rated Insulation pros in Alexandria - Updated Nov 2026

Avatar for Performance Spray Foam
Performance Spray Foam
4.9(
8
)
Spray Foam Insulation - InstallBlown-In Insulation - Install or Upgrade

Serving Alexandria, NH and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"The work they performed was beyond excellent! They were clean and respectful and worked continuously till the job was done. Can't wait to see what we will be saving on heat. Thanks so much Paul & crew!"
My jobs
My jobs
My jobs
Response time1 day
33 neighbors recently requested a quote
Recommended by37%of homeowners
Avatar for N.E.E. Construction & Spray Foam
N.E.E. Construction & Spray Foam
4.1(
46
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Alexandria, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"The work that was done installing spray foam underneath my four season room was fantastic! The owner and worker were absolutely fantastic. Great quality workmanship and very reasonably priced! I will definitely call this company for future work! Very professional, friendly, and clean. No messes were left behind. I already referred this company to friends."
Sub-Floor Basement
Basement Sub-Floor & Rim Joist
Rim Joist & Sub-Floor
Blown Insulation
Deck Build

+16

Response time2 days
Recommended by83%of homeowners
Avatar for Horsth Plastering
Horsth Plastering
5.0(
1
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Alexandria, NH and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"Diego and his crew are amazing! Punctual, fair price and just a great job all around. I even had other contractors come through who commented on what a great job they did. At one point we were on a very tight timeline and needed the remaining plaster installed before the floors went in. Diego’s crew worked late on a Saturday to make sure it was done. Simply could not have stayed on schedule without him."
Plaster
Plaster
Plaster
Plaster
Newburry, VT

+14

Response time5 hrs
6 neighbors recently requested a quote
Sonart Construction Corp.
2.3(
7
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Alexandria, NH and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"I recently had my shingle roof replaced and I?m very happy with the results. The team was professional, punctual, and completed the job efficiently. The quality of the work is excellent, and the new roof looks great. They kept the work area clean and communicated well throughout the process. I would definitely recommend them to anyone needing a roof replacement."
Avatar for Time To Paint
Time To Paint
New to Angi
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Alexandria, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Need a project done, but not sure who to call? I’m your local expert for a wide range of home improvement and repair services. With a versatile skill set in [Skill 1], [Skill 2], and [Skill 3], I specialize in tackling those tough jobs that require multiple trades. I am committed to delivering top-tier craftsmanship, dependable service, and complete customer satisfaction. No matter the task, I have the experience to do it right the first time.

Showing 1-10 of 33
Insulation FAQs, answered by experts

The best type of insulation for your home depends on your specific needs, climate, and the area you are insulating. For new construction, structural insulated panels are a highly energy-efficient option that is easy to install during the building process. In very warm climates, reflective insulation can be a cost-effective choice. For cold climates, fiberglass is an excellent option due to its high R-value and resistance to settling over time. Spray foam works well in humid environments because of its moisture-resistant properties. For standard attics, loose-fill, spray foam, or blown-in insulation are all suitable options.

The lifespan of crawl space insulation depends on how well you maintain your insulation and the type of insulation. Fiberglass will need replacing every 15 to 20 years on average if you don't have a vapor barrier in place. If you do have vapor barriers in place, then your insulation could last much longer. Spray foam insulation can last anywhere from 80 to 100 years. 

A DIY blown-in insulation project in a typical attic should take you no more than a week to complete. Experienced homeowners can blow an entire attic in one or two days.

Spray foam insulation doesn’t do well around heat sources. Therefore, You can use spray foam insulation to seal around HVAC boots that penetrate through the drywalls or around where wrapped ducts connect to the boots, but we don’t recommend using spray foam insulation to encapsulate your air ducts. Spray foam insulation on air ducts is also less effective compared to duct wraps.

Costs depend on insulation material, labor, accessibility, and whether existing insulation requires removal.

The Alexandria, NH homeowners’ guide to insulation services

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