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TRUSTED BY CHARLESTON, SC HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon140
    Verified insulation services reviews

Verified Reviews for Insulation Service pros in Charleston, SC

*The Angi rating for Insulation Service companies in Charleston, SC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

*The HomeAdvisor rating for Insulation Service companies in Charleston, SC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

Last update on January 23, 2026

Find Insulation pros in Charleston

Avatar for USA Insulation of Charleston
USA Insulation of Charleston
5.0(
5
)

Serving Charleston, SC and surrounding areas

Approved

In business since 2013

Free estimates

Warranties offered

USA Insulation has been providing homeowners with energy efficient insulation since 1985. Our trained, professional installers, service Charleston County, Berkley County & Dorchester County. We pride our company on reliability, great communication, integrity and quality work. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Please contact us today to set up a free consultation

19 neighbors recently requested a quote
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Avatar for Carolina Energy Conservation, LLC
Carolina Energy Conservation, LLC
4.2(
118
)

Serving Charleston, SC and surrounding areas

Approved

In business since 2008

Free estimates

Small jobs welcome

"He actually pointed out to me that I needed more insulation over the whole home as over a period of time it packs down. So I let him do the whole home as well as garage that I had originally wanted a quote on."
Kitchen Solatube Before
Kitchen Solatube After
Leaky Can Light
Sealed Can Light
Master Bedroom (Before Solatube Install)

+22

Response time1 day
72 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for Apex Home Innovations, LLC
Apex Home Innovations, LLC
4.8(
25
)

Serving Charleston, SC and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Mr. Miller, with Apex, is SUPER easy to work with and will do you good! They did an awesome job with removing and adding new insulation. They ended up going above and beyond and even doing a little extra work for me!"
Response time5 days
50 neighbors recently requested a quote
Recommended by85%of homeowners
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Avatar for Barrier South
Barrier South
4.8(
15
)

Serving Charleston, SC and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Credit card accepted

"Barrier South did a great job re insulating my attic and crawl space under house. Jose led a crew that were very professional and skilled. I recommend Barrier South highly. Great job at competitive prices."
Attic Insulation - Open Cell - nominal 5" - R
Attic Insulation - Open Cell - nominal 5" - R
Attic Insulation - Open Cell - 10.5" - R-38
Exterior walls - open cell walls - R-13 value
Shaved flushed for sheet rock.

+4

Response time2 days
179 neighbors recently requested a quote
Recommended by21%of homeowners
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Avatar for Energy One America, LLC
Energy One America, LLC
3.9(
69
)

Serving Charleston, SC and surrounding areas

In business since 2011

Free estimates

Credit card accepted

"Brian,the sales rep, was very professional. Their crew worked under extremely hot conditions from the sun and the heat generated by the foam application. Despite the conditions, they completed our large attic in just over 5 hours. I would recommend this company to anyone looking for this product in their home."
Open Cell Spray Foam Insulation
Open Cell Spray Foam Insulation
Closed Cell Spray Foam Insulation
Closed Cell Spray Foam Insulation
Energy One America Trucks

+8

Recommended by95%of homeowners
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Avatar for C4 Energy Insulation
C4 Energy Insulation
4.4(
7
)

Serving Charleston, SC and surrounding areas

In business since 2010

Free estimates

Small jobs welcome

"Carlos is AMAZING! I called C4 because I strongly believe in supporting the small businesses. I have no regrets. He Came out the same week I called. He is a small company with a great amount integrity and honesty!!! Price was very fare with quality work! Hard to find all this from one company. Highly recommend!"
Response time1 day
Recommended by71%of homeowners
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Showing 1-10 of 41
Insulation questions, answered by experts

In Charleston, you’ll find insulation contractors who focus on spray foam, blown-in, and batt insulation, as well as professionals specializing in attic insulation and crawl space encapsulation. Some general contractors offer dedicated insulation teams for larger renovations. There are also energy efficiency consultants who can recommend the best insulation service for Charleston’s humid climate and help you maximize available local incentives.

Helpful?

In Charleston, unexpected costs can arise if attic insulation reveals hidden moisture damage or pest infestations that need addressing. Upgrading ventilation or adding a moisture barrier is often necessary in humid homes. Historic properties may require custom insulation solutions. You might also need to adjust HVAC ductwork or address air leaks discovered during the insulation service, which can add to the project’s scope.

Helpful?

Charleston’s coastal weather means insulation projects should use moisture-resistant materials and vapor barriers to prevent mold. Schedule work outside hurricane season for fewer delays. Local codes require minimum R-values for attic insulation, and homes in historic districts may need special permits. Flood-prone areas require additional protection, and termite-resistant insulation is highly recommended for Charleston homes.

Helpful?

Charleston homes with inconsistent indoor temperatures, visible gaps in attic insulation, or frequent moisture issues are strong candidates for insulation service. If your home was built before modern energy codes or you notice condensation on windows, it’s worth inspecting crawl spaces and attic insulation. A local pro can use thermal imaging to identify hidden problem areas unique to Charleston’s climate.

Helpful?

Upgrading insulation in Charleston often increases home value and attracts buyers seeking lower utility bills and better comfort. Homes with modern attic insulation and moisture barriers stand out in the local market, especially given Charleston’s humidity. Highlighting recent insulation service and energy efficiency improvements during showings can help your property appeal to environmentally conscious buyers.

Helpful?

The Charleston, SC homeowners’ guide to insulation services

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

See all articles