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TRUSTED BY JOHNS ISLAND, SC HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon144
    Verified insulation services reviews

Verified Reviews for Insulation Service pros in Johns Island, SC

*The Angi rating for Insulation Service companies in Johns Island, 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 Johns Island, 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 December 31, 2025

Find Insulation pros in Johns Island

Avatar for USA Insulation of Charleston
USA Insulation of Charleston
5.0(
5
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Johns Island, 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

30 neighbors recently requested a quote
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Avatar for Carolina Energy Conservation, LLC
Carolina Energy Conservation, LLC
4.7(
96
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving Johns Island, SC and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Very well, Very neat, personable, and efficient. Very pleased"
Sprayfoam Insulation
Solatube in Charleston
Sprayfoam Insulation
Solatube in Charleston
Detached Panel

+17

Response time1 day
14 neighbors recently requested a quote
Recommended by92%of homeowners
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Avatar for Apex Home Innovations, LLC
Apex Home Innovations, LLC
4.8(
25
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+1 more

Serving Johns Island, 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
61 neighbors recently requested a quote
Recommended by85%of homeowners
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Avatar for Barrier South
Barrier South
4.8(
15
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Johns Island, 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
162 neighbors recently requested a quote
Recommended by21%of homeowners
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Avatar for Coastal Synergy, LLC
Coastal Synergy, LLC
4.8(
4
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Johns Island, SC and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Very nice working with them! Fair pricing and excellent service! Highly recommend!!"
Response time3 days
14 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Energy One America, LLC
Energy One America, LLC
3.9(
69
)
Injection Insulation - InstallSpray Foam Insulation - Install

Serving Johns Island, SC and surrounding areas

In business since 2011

Free estimates

Credit card accepted

"They were quick to respond and schedule. I was in the RE with my husband without phone service at the time of my initial appointment but he did the evaluation and we scheduled the work the next day. The wwork was neat and efficient."
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 Advanced Spray Foam and Coatings, LLC
Advanced Spray Foam and Coatings, LLC
4.7(
21
)
Injection Insulation - InstallSpray Foam Insulation - Install

Serving Johns Island, SC and surrounding areas

In business since 2015

Free estimates

Credit card accepted

"These are the "go-to" guys for spray foam insulation. I would recommend them any time. They were friendly and efficient."
Response time2 days
Recommended by95%of homeowners
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Avatar for Eco Friendly Services
Eco Friendly Services
4.9(
31
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Johns Island, SC and surrounding areas

In business since 2015

Free estimates

Emergency services offered

"The service technician was excellent. He was professional and immediately came and completed the work requested. The unit is working perfectly and because of this, l requested another service to have the unit cleaned. I would definitely recommend your company to anyone in need of your services. Thank you."
Beautiful installed new High Efficiency WwilMclain Evergreen Boiler
New 14 Seer Condenser with new pad and new Disconnect Box
Hi efficiency Amana heating and cooling system
Install newheating and cooling system
Remove old Boiler and install a New Boiler

+34

Recommended by96%of homeowners
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Showing 1-10 of 36
Insulation questions, answered by experts

Your home's location, budget, and the type of insulation you’re using are just a few of the factors that can help you choose the right insulation. For example, blown-in insulation is typically used in attic spaces, while batts and rolls are ideal for floors and walls. Blown-in insulation is usually a good option if you're adding more insulation to an area that already has some, but not enough.

If you have access to the foundation walls, adding spray foam insulation to your existing unfinished basement or crawl space is straightforward. Replacing existing insulation in your unfinished attic space is possible after removing the old insulation. However, spray foam insulating an existing wall after the drywall is in place isn’t possible unless you remove most of the drywall.

Closed-cell spray foam insulation itself serves as a vapor barrier (or vapor retarder). However, you may need to install a vapor barrier if you have open-cell spray foam insulation. When in doubt, work with a professional insulation contractor, as they can provide more detail about the specific needs of your home in your climate.

The primary downside of radiant barriers is their limited effectiveness in cold climates. They are designed to reflect radiant heat, making them less beneficial in cooler conditions where heat retention is more important. 

Radiant barriers require proper installation to maximize effectiveness. Incorrect placement can lead to minimal benefits. They also do not provide insulation, meaning they should be used in conjunction with traditional insulation for optimal energy efficiency. 

Polyisocyanurate foam, or polyiso for short, has the highest R-value per square inch: 6.5 to 6.8. Polyiso is a rigid foam that comes with a reflective foil on both sides to serve as a radiant barrier. Given its high R-value, rigid foam is usually meant for foundations and basement walls.

The Johns Island, SC homeowners’ guide to insulation services

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

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