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Top-Rated Insulation pros in Williamsburg - Updated Nov 2026

Avatar for Energy Nerds
Energy Nerds
4.6(
20
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Williamsburg, IA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"They were honest by explaining to me why I shouldn't blow insulation into my walls because the siding is wood and would cause mold issue. Other companies would do the work even though they shouldn't."
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+22

Response time2 days
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Halo Design Build, LLC
Halo Design Build, LLC
5.0(
5
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Williamsburg, IA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

Halo Design Build, LLC is here to help! \n\nOur Thermal division offers a variety of services including: Sprayfoam insulation, blown-in Cellulose or Fiberglass, Batt insulation, Ecoseal (for sealing the gaps around windows, doors, ets), Siding and Rooftop coatings. Just put what you are looking for in your inquiry and we will take it from there!\n\nOur Design/Build division is quite diverse, offering anything from decks to full kitchen remodels to Design and Build Custom Homes. Our Custom Homes are high-end, so we may not be the least expensive, but we are the best. If high quality and detail is what you are looking for, we are the team to provide it. We are selective in who we accept, so the more details you can put into your inquiry, the higher probability we will accept your opportunity.\n\nWe are based out of the Mount Pleasant area. Give our team a call today. We're looking forward to working with you!\n

Mission
Sprayfoam
Mission
Cabin
Cabin

+38

Response time2 days
2 neighbors recently requested a quote
Recommended by50%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 Williamsburg, IA and surrounding areas

In business since 2000

Free estimates

Warranties offered

"Jeff Smith is based at the Waterloo office. He was very good at customer service & responded to my emails in a reasonable time given this is probably a busy time of the year (November) for them. I am having additional blow in insulation behind a knee wall & in the attic to bring me up to code. The work has not been completed yet. I am waiting for an energy audit. That is why I can only rate the company as a 3."
 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
Comfort Solutions Heating and Cooling
4.9(
11
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Williamsburg, IA and surrounding areas

In business since 1988

Free estimates

Emergency services offered

We are Iowa's premier provider of home comfort solutions. We offer heating and air conditioning services, insulation, spray foam, air sealing and energy audits. Comfort Solutions has been taking care of homeowners here in Iowa for 31 years. We use the science of energy audits to solve your heating and cooling needs. Our passion is making every single room in your house amazingly comfortable. Call us anytime to receive a free repair quote or free home energy audit.

Recommended by100%of homeowners
Avatar for Preferred Home Improvements
Preferred Home Improvements
4.7(
12
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Williamsburg, IA and surrounding areas

In business since 2010

Free estimates

Emergency services offered

We here at Preferred Home Improvements take pride in our work! Customer service and satisfaction is our number one goal! The Services we offer are : Air Duct Cleaning Dryer vent cleaning Attic Insulation Crawl space clean ups We also offer other home services! We do full viedo inspections of duct work we also will do a whole walk through and explain everything step by step. We also offer before and after pictures! We have been in business over 6 years and are here to stay. We promise you will have a Awsome experience with us. We also offer yearly warranties and free estimates! Our service area is within 150 miles of the Quad Cites!

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+30

Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Williamsburg, IA and surrounding areas

In business since 1971

Credit card accepted

"Roberto was the technician and he was very professional, polite, and personable. He inspected the rest of our system and told us things that needed to be changed or repaired. He showed me pictures of everything. Everything he told me about was accurate. He quoted me a price for R38 insulation , Some of our ducts were plastic and he recommended them to be changed. I agreed completely and didn't know they were plastic. I would have had them done the work but I had no price comparisons to make and besides I didn't have the money right then. So he just finished the vent cleaning and left his card. He did a great job on the vent cleaning and was happy with the work."
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+2

Recommended by65%of homeowners
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Insulation FAQs, answered by experts

It’s technically possible to install loose-fill cellulose insulation without a blower, but it’s much more time-consuming, tedious, and dangerous. You’ll need to wear the proper protective coverings to handle the cellulose after it’s been doused in boric acid; use a shovel when you can to transport the material from the bag into the wall cavity.

That said, if you purchase cellulose materials at a home improvement store, ask if they rent out blowers for free or at a discounted rate. In many cases, if you buy the material from the store, they’ll rent out the blower at no extra cost.

The cost of installing spray foam insulation is $2,760 on average, but this cost can be as low as $650 or as high as $7,700. The main cost factor is the size of the insulated area and the type of spray foam insulation. 

Polyurethane spray foam costs between $0.44 and $1.50 per board foot, where a board foot is equal to the volume of a one-foot length of a board. More expensive options, like soybean or vegetable oil spray foam, range from $1.50 to $3.00 per board foot.

If the temperature outside is around 90 or 100 degrees with the sun beating on your home’s roof, it’s common for the attic temperature to reach 150 degrees or more. This excessive heat shows the importance of having a radiant barrier in place along with insulation. The radiant barrier reflects the heat entering the attic back upward, keeping your home’s temperature more consistent.

A garage ceiling needs a vapor barrier if it’s a heated garage or if you’re installing insulation in the ceiling. Without a vapor barrier, you risk moisture issues and mold growth. If you have an unheated garage and don’t plan on installing insulation that could get wet and harbor mold, the ceiling doesn't need a vapor barrier.

Yes, PEX pipes should be insulated in certain situations. While insulation is not always necessary for pipes running through insulated interior or external walls, it is recommended for any pipes located in uninsulated rooms, unheated areas, or outside, especially in regions with cold winters. The primary reason is to prevent freezing. Although PEX is more resistant to cracking from freezing than other materials, repeated freezing and thawing can weaken the pipes over time, increasing the risk of a burst.

The Williamsburg, IA homeowners’ guide to insulation services

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