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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon147
    Verified insulation services reviews

Top-Rated Insulation pros in Louisville - Updated Nov 2026

Bestway Insulation, LLC
4.1(
286
)
Blown-In Insulation - Install or Upgrade

Serving Louisville, CO and surrounding areas

Approved

In business since 1976

Free estimates

Emergency services offered

Home Pro of the Year in 2010 (Service Magic)Home Performance Contractor of the Year for the last 8 out of 10 years. We are a company that specializes in re-insulating existing homes by using blown-in insulation and getting huge reductions on our customers energy bills by Air Sealing and compressing fiberglass or rockwool in the walls and Dense packing it tight.Where most companies are happy getting 10%energy reductions on their clients homes, we want 50% or higher. Our family has owned and operated Bestway Insulation, LLC, in Colorado since 1976. Born & raised CO. Top Rebate producer for air sealing in 2009 - 2021. Home Performance with energy star Contractor of the year 21 out of 23 Years starting with NREL when they were doing it in 1996. I want huge results for my clients.

Response time1 day
18 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for Empower Insulation, LLC
Empower Insulation, LLC
5.0(
11
)
Spray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Louisville, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"I had an excellent experience with Empower Insulation from start to finish. They took the time to explain all of my options, answered every question I had, and helped me choose the best insulation solution for my home. I highly recommend Empower Insulation to anyone looking for top-notch insulation services. Great company, great service, and even better results!"
Custom Home New Build
Custom Home
Custom Home
Insulation Attic
Insulation Removal

+11

Response time1 day
4 neighbors recently requested a quote
Avatar for ATTICPRO INSULATION LLC
ATTICPRO INSULATION LLC
5.0(
8
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Louisville, CO and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"I had a great experience with this insulation company. The crew showed up on time, were very professional, and did a really great job. They were friendly, worked efficiently, and left everything clean when they were finished. I’m very happy with the quality of the work and would definitely recommend them to anyone looking for insulation."
Attic Insulation
Attic Insulation
Attic Insulation
Attic Insulation
Attic Insulation

+13

39 neighbors recently requested a quote
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Insulation FAQs, answered by experts

You can purchase bags of cellulose and loose-fill fiberglass blown-in insulation from the same local home improvement store where you rent your blower. If you want to use rock wool insulation, you may need to special order it.

These two types of foams are similar chemically, but they are applied in a much different way and each has its own pros and cons. Spray foam can only be used if the area where you will be installing the installation is wide open and easy to access. Injection foam should be used where it's cost-prohibitive to remove the walls that are placed over the insulation. Spray foam is a much less expensive process and requires less expertise. 

As long as a licensed professional installs your gas lines, you don’t have to do anything extra to prepare for cold weather. If there are pipes that require a wrap, your installer should have done it for you already. If you want to be absolutely sure your gas system is good to go for winter, the best option is to schedule a gas line inspection.

It is possible to insulate your walls without removing drywall, but it’s not a good idea to attempt the work yourself. A professional can use blown-in insulation or spray foam insulation to fill wall voids without opening up the walls, and the option they use typically depends on your climate and whether or not there’s insulation in your wall already that can remain in place. Spray foam insulation costs more and isn’t always a viable option, but it’s a better insulator. Call in an expert to help decide which is right for you.

Minimal maintenance is required, though regular inspections to ensure insulation hasn't shifted or deteriorated can improve performance over time.

The Louisville, CO homeowners’ guide to insulation services

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