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    Average homeowner rating
  • Verified reviews icon12
    Verified insulation services reviews

Top-Rated Insulation pros in Agency - Updated Nov 2026

Avatar for Green Improvement Consulting
Green Improvement Consulting
4.9(
83
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving Agency, MO and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Shawn provided lots of information during the visit for an estimate. The day of work they arrived on time and were diligent about accomplishing adding insulation to my attic. Their clean up was thorough. They were courteous and pleasant."
Additional Photos
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+11

Response time2 days
4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Reliable Insulation
Reliable Insulation
5.0(
7
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving Agency, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Credit card accepted

"The company was efficient and communicated well. I had several opportunities to check every area they worked on over and didn’t find anything they missed or skimped on. I went with their wet blown cellulose for my interior walls. It dried quickly and remained in place for a few weeks until my drywall went up."
Response time5 days
8 neighbors recently requested a quote
Recommended by14%of homeowners
Avatar for Green Star Energy
Green Star Energy
4.8(
244
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Agency, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"A sole proprietor business, Green Star provided a very competitive itemized written bid. Stuart was very accommodating in considering old (>100 years) home challenges and discussing insulation options and solutions. Promptly arrived on scheduled date, his team was diligent in adding blow in insulation to attic and exterior wall space, as well as foam to basement sill plates, all in one day. Very friendly, knowledgable, professional and unobtrusive in providing their services."
Larson Project
Larson Project
Before
Reflective insulation - After
Solar attic ventilating Fan

+12

Response time2 days
49 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Evolution Sprayfoam, LLC
Evolution Sprayfoam, LLC
5.0(
6
)
Spray Foam Insulation - InstallBlown-In Insulation - Install or Upgrade

Serving Agency, MO and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"John is very professional and self motivated. He shows up when he says he is gonna and does a very fine job of air sealing and insulating. Goes over and above. Highly recommend."
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3
4
5

+66

Response time10 hrs
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for C4 Insulation LLC
C4 Insulation LLC
4.9(
8
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Agency, MO and surrounding areas

In business since 2023

Free estimates

Emergency services offered

"I can’t say enough good things about this insulation service! From start to finish, the experience was absolutely top-notch. The team was punctual, professional, and incredibly knowledgeable. Mauricio took the time to explain all my options and helped me choose the best solution for my home. Mauricio also worked around my schedule going above and beyond with communication ensuring I was confident in my home improvement solution. The installation itself was seamless—efficient, clean, and with great attention to detail. I was impressed by how respectful they were of my space, leaving everything spotless once the job was done. If you’re considering upgrading your insulation, don’t hesitate—C4 Insulation is reliable, trustworthy, and truly cares about delivering quality results. I highly recommend them to anyone looking to improve their home’s comfort and efficiency!"
Project 575
2 inches closed cell
Part 2 after foam
Master bedroom
Aftermath

+10

Response time10 hrs
Response rate96%
Avatar for Blue Collar Building Solutions LLC
Blue Collar Building Solutions LLC
4.9(
14
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Agency, MO and surrounding areas

In business since 2017

Free estimates

"They were very professional and they took the time to explain what they did. They took before and after pictures. They also cleaned the area where the insulation landed in my garage afterwards. I would highly recommend them"
Before
After
Softwash Shingle Roof
House - Before
House - After

+28

Response time9 hrs
Recommended by78%of homeowners
Avatar for Siding Repair Systems
Siding Repair Systems
4.5(
128
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Agency, MO and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"The BATH UPSTAIRS   had a window that needing bracing, a bath that had black mold behind the horrible VINYL wall, and had to be insulated with MOISTURE proof materials and RE-TILED - the walls, under the window and behind the tub and around the laundry chute opening.  The Downstairs Bath also needed the window braced and tiled as it was falling and splitting from the ceiling due to POOR WORKMANSHIP by someone NOT on Angies List back in 2003!!   SO, Siding Repair Systems -  They did it all, with their contractor Thomas Morton.  What a really fantastic job - on BOTH these Bathroom windows, Tiling and securing/supporting.  EXCELLENT WORK!!  Clean and neat - it looked like they had a MAID SERVICE come in and clean up after them.  Honestly.  So neat and clean they were.  Thanks for a Really good job.   "
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+6

Recommended by89%of homeowners
Showing 1-10 of 24
Insulation FAQs, answered by experts

There are many ways to keep your house cool without central air. In fact, ductless mini-split AC systems are a solid alternative to central AC for situations when you can’t install ducts in your home. If you’re looking for a more budget-friendly cooling solution, consider using window AC units or portable air conditioners.

In some cases, yes, insulating an unheated garage can lead to mold and mildew. The issue with insulating a garage is that the interior will warm up and cool down more slowly than the exterior air, which can cause condensation inside the space. Where there is moisture, there is likely to be mold and mildew over time. Installing a vapor barrier can help avoid moisture and mildew problems in an insulated garage.

Through R-value assessments based on climate and existing insulation.

Yes, professionals install and upgrade insulation for all home or business areas.

Yes, insulating hot water pipes helps your system run more efficiently. This is especially true in basements in colder climates, where cold air likes to settle in. There are a few ways to insulate water pipes (foam is common) to keep hot water hot, reducing the need for your water heater to constantly heat the water in the tank or your circulator to kick on more than necessary.

The Agency, MO homeowners’ guide to insulation services

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