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TRUSTED BY JOHNSTON, IA HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon249
    Verified insulation services reviews

Top-Rated Insulation pros in Johnston - Updated Nov 2026

Avatar for INSULATE IOWA LLC
INSULATE IOWA LLC
4.8(
175
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving Johnston, IA and surrounding areas

Approved

In business since 2008

Free estimates

Offers commercial services

"Abraham and his team, Will and Josh, did a great job of removing old insulation, sealing air leaks and adding new insulation to the attic in my 46 year old home. The old insulation was blocking air flow through the attic and this needed to be addressed, which they did. They were very professional and hard-working. Communication was excellent and everything was well explained and the process photographed. We are glad we hired Abraham for this project!"
Before
After
1
2
1

+10

Response time1 day
Response rate100%
6 neighbors recently requested a quote
Avatar for Patriot Gutters and Insulation LLC
Patriot Gutters and Insulation LLC
5.0(
6
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Johnston, IA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today! \n

Spray foam insulation
Spray foam insulation
Spray foam insulation
Spray foam insulation
Response time6 hrs
Response rate100%
8 neighbors recently requested a quote
Avatar for 777 Remodeling, Renovations & Repairs LLC
777 Remodeling, Renovations & Repairs LLC
4.2(
11
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Johnston, IA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Emergency services offered

Warranties offered

With over 25 years of experience we are 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. 100% Satisfaction Guaranteed!

Response time2 days
8 neighbors recently requested a quote
Avatar for Attic Solutions
Attic Solutions
4.8(
91
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Johnston, IA and surrounding areas

In business since 2009

Free estimates

Warranties offered

"Prevailing came in to insulate my basement and attic. The workers were professional and worked the entire time they were here (which seems like a low standard, but I've had situations where 4 people come to work and 2 stand around talking for most of it from other companies). More importantly, they explained what they were doing as they did it, and cleaned up after themselves before they left! Scheduling the service was quick and easy since they were able to use our Alliant Energy quote to avoid a second home assessment, and they came in under budget. Very satisfied - plan to have them back to blow insulation in the exterior walls before winter."
Consistent insulation level.
Our family business
Newer attic insulation topped off to R-49
Insulation added in a restricted space to R-49
Attic insulation added around dense truss work.

+13

Response time8 hrs
Recommended by98%of homeowners
Avatar for Retrofoam Iowa, Inc.
Retrofoam Iowa, Inc.
4.3(
44
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallSpray Foam Insulation - Install

Serving Johnston, IA and surrounding areas

In business since 2000

Free estimates

Warranties offered

"The installers were careful, courteous, & thorough. They left the premises clean & uncluttered. I can't wait to see the difference in our heating bill. They installed spray foam in the rim joist, a small ceiling in the basement & the walls in a crawl space."
 Remove siding, inject product, replace siding.
 We fill the entire space...
 Between the studs-sealing the home
Homes we have insulated
Homes we have insulated

+6

Recommended by100%of homeowners
Avatar for L & L Home Solutions With Universal Windows Direct
L & L Home Solutions With Universal Windows Direct
4.9(
88
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Johnston, IA and surrounding areas

In business since 2008

Free estimates

Credit card accepted

"Abraham and his team were a fantastic help. Their service was life changing for our family. We live in a 120 year old home that had almost no insulation in the walls. Our HVAC could never keep up on cold, windy days. The last 3 winters there were times we had to go stay elsewhere as the home was too cold. Fast forward to this winter, after they completed the work we saw an immediate return. Bills went down and the home is comfortable. Heck there were times our HVAC stopped since it was so warm! They were very professional and worked around our hectic schedule. I would fully recommend them to anyone in need of insulation services."
Insulation Project
Insulation Project
Insulation Project
Insulation Project
Insulation Project

+2

Recommended by100%of homeowners
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Insulation FAQs, answered by experts

Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: 

  • If the insulation is over 15 years old

  • If the insulation is wet or moldy

  • If it is vermiculite insulation

  • If you see signs of pest infestation

Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.

Radiant barriers and insulation serve different purposes, so one is not inherently better than the other. Radiant barriers reflect radiant heat, helping keep spaces cool, especially in hot climates, while insulation slows heat transfer through conduction. For optimal energy efficiency, it’s best to use both together. 

Radiant barriers can enhance the performance of insulation by preventing heat gain in the summer and heat loss in the winter. The choice between them depends on specific climate conditions and the building’s design requirements.

The best type of attic insulation depends on where you live, your budget, and what stage of construction the attic is in. For example, if you're building a house, then structural insulated panels are a worthy investment since they're easy to install during construction and they're the most energy-efficient type of insulation.  

Additionally, if you live in a very warm climate, then you can potentially save quite a bit of money by opting for reflective insulation, which is more affordable than comprehensive insulation but doesn't work well for cool climates. Blown-in, loose-fill, and spray foam insulation are all great options for attics in moderate climates.

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.

Rockwool insulation can last up to 100 years, but just how long this insulation lasts in your home depends on how well it's maintained. Poorly installed insulation may last only 30 years, so be sure to regularly inspect your home's insulation for water damage, settling, and pests to give your insulation the best chance of having a long lifespan.

The Johnston, IA homeowners’ guide to insulation services

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