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Top-Rated Drywall insulation pros in Johnsonville - Updated Nov 2026

Avatar for Carolina Energy Conservation, LLC
Carolina Energy Conservation, LLC
4.7(
96
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Johnsonville, SC and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"I called Carolina Energy Conservation to have some new insulation put in my attic. The estimater came out within a few days of the phone call, and I received a detailed e-mail about what to expect. Matt gave me a good run down of what I needed to make my upstairs floor more comfortable. He called ahead of time, was on time, and was very professional. The estimate was for 4,000 board ft of insulation, 800 sq ft of radiant barrier installed, and an attic tent/hatch. Total cost was about $1600. They asked for a down payment of 30% up front, which I paid. Matt told me I would recieve a call to schedule the work within 1-2 business days. That never happened. After 1 week I called and spoke with Mary, who informed me their office manager who does schedules was out sick the previous week. She assured me he would call me back to setup a time for the work to be done. That never happened either. Fast forward another week. I called a 2nd time, and finally got an apointment setup for the following week. The two guys they sent to do the job were friendly and professional. After a few hours they let me inspect the work, and it was completed to my satisfaction. I normally have to set my AC to 73-74 in the summer to keep my upstairs comfortable, and the HVAC turns on quite often. Now I can set it to 76-77 and it remains comfortable, and the HVAC doesn't run as often. All in all I am happy with the overall experience, guess they just got hung up on scheduling."
Sprayfoam Insulation
Solatube in Charleston
Sprayfoam Insulation
Solatube in Charleston
Detached Panel

+17

Response time1 day
18 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
390
)
Blown-In Insulation - Install or Upgrade

Serving Johnsonville, SC and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"I was impressed with the quality and skill of the crew, they knew exactly what to do and the result was excellent. I was extremely impressed with the quality of the insulation, and feel much more comfortable with my home! The foreman was excellent, very skilled, and the turn out was outstanding!"
Asphalt Roofing
Asphalt Roofing
Asphalt Roofing
Asphalt Roofing
Asphalt Roofing

+5

853 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Advanced Spray Foam and Coatings, LLC
Advanced Spray Foam and Coatings, LLC
4.7(
21
)
Injection Insulation - Install

Serving Johnsonville, SC and surrounding areas

In business since 2015

Free estimates

Credit card accepted

"Value for the money invested was extremely high, would strongly encourage those needed spray foam insulation in their homes or businesses to contact Advanced Spray foam for a price. Great people to deal with !"
Response time2 days
Recommended by95%of homeowners
Avatar for ADT Solar
ADT Solar
4.4(
111
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Johnsonville, SC and surrounding areas

In business since 2008

Free estimates

Warranties offered

"MARC JONES CONSTRUCTION TEAM  ARRIVED ON SCHEDULE AND INSTALLED THE SOLAR ARRAY OVER TWO DAYS.  ON MONDAY, WE HAD INSPECTION AND A FEW DAYS LATER THE ATTIC WAS INSULATED WITH FOAM TO REDUCE HEAT LOAD ON AIR CONDITIONING SYSTEM.  EVERYTHING WENT SMOOTHLY EXCEPT FOR INADVERTANTLY UNPLUGGING THE SYSTEM CIRCUITBREAKER DURING THE FOAMING OPERATIO.
"
11 kW PV Installation
5 kW PV Installation
9.5 kW PV Installation
Recommended by89%of homeowners
Avatar for CNT Foundations
CNT Foundations
4.5(
37
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Johnsonville, SC and surrounding areas

In business since 2003

Free estimates

Credit card accepted

CNT Foundations is the best foundation repair company in the industry. Locally owned and operated since 2010, we service commercial and residential foundation repairs, crawl space repairs, and New Construction projects in the Carolinas, Savannah and Augusta, Georgia. Call today for a free estimate and find out why CNT Foundations is #1.

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+270

Recommended by84%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Johnsonville, SC 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
ADVANCED AIR SYSTEMS
4.4(
18
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallInsulation - Install or Upgrade

Serving Johnsonville, SC and surrounding areas

In business since 1985

Emergency services offered

Credit card accepted

"AT YOUR DOOR IN 2 HOURS OR LESS"\nHEAT PUMP AND GAS-PAK SPECIALIST, CERTIFIED FOR WARRANTY WORK ON ALL HEATING AND AIR MANUFACTURERS,\nHEATING AND AIR CONDITIONING SYSTEM REPAIR, SERVICE AND INSTALLATION, WATER HEATERS, \nAIR DUCT CLEANING

Recommended by94%of homeowners
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Drywall Insulation FAQs, answered by experts

In most cases, plaster repair will improve your home’s energy efficiency because a solid barrier of the insulative material helps keep conditioned air inside your home. Major plaster repair jobs like repairing large cracks or crumbling sections of plaster or applying a skim coat might make a noticeable difference in your heating and cooling bills. Not only can plaster repairs improve efficiency, but they can also reduce strain on your HVAC equipment, potentially saving you money on maintenance and repairs.

Drywall anchors won’t work on plaster. Instead, they will more than likely cause more damage and pull out the plaster. The best type of anchors to use on plaster walls are the ones that will bite into the surrounding area, such as molly bolts and toggle bolts. Masonry anchors with expanders on the sides also work for lighter pictures.

You should wait at least 24 hours for drywall mud to dry before sanding or applying another coat. However, the exact drying time depends on several factors, including the thickness of the application, room temperature, humidity, and the type of compound used. Thicker layers, or projects in high humidity, may require 48 hours or more. Lightweight compounds tend to dry faster than heavier, all-purpose ones. You'll know the mud is ready when it feels completely dry and firm to the touch and has changed to a consistent light color. Sanding too early can cause smudging or gouges, so patience is essential for a smooth finish.

You should always hang drywall from the top down. Starting at the top makes it easier to create a straight, tight line between the ceiling and the wall. Any gaps that occur will be at the bottom, where they are easier to manage. You can either cut the bottom piece of drywall to fit the remaining space or cover the gap with baseboard trim. Additionally, starting at the top is physically easier, as you won't have to fit the top sheet into a tight space between the lower sheet and the ceiling, or try to balance the upper sheets on the lower ones while securing them.

Yes, taping inside corners is a critical step in the drywall installation process.  Properly taping inside corners is essential for achieving a professional look, and an installation that resists cracking and maintains its integrity over time. Taping the corners involves the application of a joint compound along the seam where two drywall pieces meet. This process provides reinforcement, conceals the seam, and prevents future gaps or cracks from developing.

The Johnsonville, SC homeowners’ guide to drywall insulation services

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