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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon42
    Verified insulation services reviews

Top-Rated Insulation pros in Napavine - Updated Nov 2026

Avatar for Lake Atitlan Insulation LLC
Lake Atitlan Insulation LLC
5.0(
20
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Napavine, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"We were considering upgrading our insulation but weren't sure if it was worth the investment. After consulting with Lake Atitlan Insulation, they convinced me it was the right choice. The insulation they installed not only made our home more comfortable but has already saved us money on energy costs."
Before & After
Before & After
Before & After
Before & After
Before & After

+5

Response time9 hrs
Response rate93%
3 neighbors recently requested a quote
Avatar for Turner Home Insulation LLP
Turner Home Insulation LLP
4.8(
11
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Napavine, WA and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"The entire process from estimating (Kenny) to project management (Walter) to team members (four), was efficient, respectful of our property and extremely communicative. The team went multiple extra steps to make sure our crawl space free of entry points for critters while installing all new insulation"
Our LOGO
Response time1 day
7 neighbors recently requested a quote
Recommended by72%of homeowners
Avatar for Spray Foam Specific, LLC
Spray Foam Specific, LLC
4.8(
23
)
Spray Foam Insulation - InstallInjection Insulation - Install

Serving Napavine, WA and surrounding areas

Approved

In business since 2011

Free estimates

Small jobs welcome

"They sprayed the ceilings of my cargo containers and it worked perfectly. They're warmer in the cold and cooler in the heat. They were prompt, professional and they cleaned up afterwards. It was expensive, but well worth the money compared to me building frame walls and installing batts of insulation and covering with plastic, etc. Their insulation dries hard and even after months, it hasn't been damaged. I'm really picky about good quality work and they checked every box."
Floor Spray Foamed
Insulated Attic Space
Pole Building Spray Foam
Metal Building Spray Foamed
Metal Building Spray Foamed

+32

Response time2 days
8 neighbors recently requested a quote
Recommended by100%of homeowners
A G INSULATION LLC
5.0(
10
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Napavine, WA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

A G INSULATION LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. \n

Recommended by22%of homeowners
Avatar for Acorns Attics & Crawls, LLC
Acorns Attics & Crawls, LLC
5.0(
17
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Napavine, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Credit card accepted

"Acorns Attic was hired for a rodent removal job and I had some insulation replaced since it was dirtied with rodent droppings. Phil and team did a great job. They took plenty of pictures of before and after. I haven’t had rodents since they patched up the openings and the insulation looks great!"
Response time4 hrs
Response rate100%
32 neighbors recently requested a quote
Avatar for WASHINGTON RETROFOAM LLC
WASHINGTON RETROFOAM LLC
4.8(
6
)
Injection Insulation - Install

Serving Napavine, WA and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

We have over 27 years of experience and over 100k homes insulated. RetroFoam is a non-toxic, odor-free, tripolymer-based resin that acts as both an insulator with a high R-Value and an air seal. This injection foam doesn't off-gas, is Class One Fire Rated, and safe to have in your home. It is an excellent choice for existing exterior walls and can be installed from outside the home. \n \nWashington RetroFoam understands that your home is your biggest investment and you don't want to waste time and money dealing with an uncomfortable home and high energy bills. We offer PREMIER service to the following neighborhoods: * Shoreline, Bellevue, Magnolia, Ballard, Queen Anne, West Seattle, Capitol Hill, Wallingford, University District, Magnolia, Seward Park, Fauntleroy, Laurelhurst, Bothell, North Bend, Snoqualmie, Renton, Kent, Des Moines.

My jobs
My jobs
My jobs
My jobs
My jobs

+22

Response time2 days
Response rate100%
13 neighbors recently requested a quote
Showing 1-10 of 46
Insulation FAQs, answered by experts

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.

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.

The life span of insulation is between 20 and 100 years. At that time, existing insulation can fall victim to gravity, resulting in compression, which reduces its insulating protection or R-value. If you can't simply add more insulation over the existing material, removing the old to increase the effectiveness of the new can reduce your energy bills and make the project worth the time and money investment.

The most insulative type of insulation for behind drywall is spray foam insulation, but this is the most expensive insulation available. The most common insulation—sometimes considered the best for the value you get for the money—is fiberglass roll or fiberglass batt insulation, which is significantly more affordable but also far less insulative. The best kind of insulation for your house will also vary based on the climate in your area, your budget, and more. A professional insulation company can help you decide which type is best for your home.

Most insulation lasts 15 to 20 years, but it really depends on the type of insulation. Spray foam is a permanent insulation material that can last up to 100 years. Fiberglass and cellulose typically settle, shift, or deteriorate around 15 years. Once your insulation reaches the 15-year mark, it's time to check it for signs of needing to be replaced.

The Napavine, WA homeowners’ guide to insulation services

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