Insulation Contractors · Charleston, SC/Updated June 13, 2026
The Best Insulation Contractors in Charleston, SC
Find the most reliable insulation contractors in Charleston, backed by real customer reviews and expert insights.
MHMaya Hendricks · Home Services Editor Updated June 13, 2026 · Next review July 2026
Editorially independent10 companies evaluated
cover story
★ Editor's ChoiceExtreme Spray Foam of Charleston
96Score
Latest update · June 13, 2026: Initial ranking published. 10 Charleston-metro insulation contractors businesses evaluated, top 10 ranked by Vetted Score.
In Charleston, SC, proper insulation is essential for maintaining comfortable indoor temperatures and energy efficiency. With the city's unique climate, homeowners need reliable insulation contractors to ensure their homes are well-protected against heat and humidity. Our list highlights the top insulation contractors based on customer feedback and service quality.
We evaluated ten insulation contractors in the Charleston area, analyzing over 100 reviews to determine their Vetted Scores. Our rankings reflect genuine customer experiences, focusing on quality, reliability, and overall service satisfaction. No company pays for placement, ensuring an unbiased selection process.
10insulation contractors evaluated in Charleston
4.76average rating across the field
112customer reviews analyzed
Cityvetted analysis of public Google review data, updated June 13, 2026.
To create this ranking, we assessed each insulation contractor's customer reviews, ratings, and service offerings. We consider factors such as response time, professionalism, and the quality of materials used. Our goal is to provide a transparent overview of the best options available in Charleston.
We refresh our rankings monthly to include the latest reviews and feedback. This ensures that our recommendations remain up-to-date and relevant for homeowners seeking insulation services in the Charleston area.
The Vetted Score: six weighted factors
Customer sentiment25%
Rating quality20%
Review volume & velocity20%
Website trust signals15%
Service breadth10%
Business longevity10%
Sentiment is measured by AI analysis of review text, recency-weighted, with verified-pattern checks to discount suspicious review bursts.
With a stellar rating of 4.8 from 23 reviews, Extreme Spray Foam of Charleston is praised for its quality workmanship and knowledgeable staff. Customers appreciate the thoroughness of their insulation projects, making them ideal for homeowners seeking reliable service. However, some reviews mention long wait times for appointments. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is reliable spray foam insulation. It serves Charleston, SC, with $1.50 to $3.00 per square foot pricing, and the honest trade-offs are long wait times for appointments and limited availability.
New Leaf Sprayfoam boasts a perfect rating of 5 from 9 reviews, highlighting their exceptional customer service and competitive pricing. Reviewers often commend their quick response times and efficiency. They are particularly suitable for budget-conscious homeowners. However, their limited review count makes them somewhat unproven in the long term. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is budget-friendly insulation solutions. It serves Charleston, SC, with $1.50 to $2.50 per square foot pricing, and the honest trade-offs are limited review count and newer company.
Palmetto Spray Foam Insulation has garnered a 4.8 rating from 12 reviews, with customers praising their attention to detail and professionalism. They excel in providing insulation for both residential and commercial properties. A downside is that some clients noted slower project completions than expected. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is residential and commercial insulation. It serves Charleston, SC, with $1.50 to $3.00 per square foot pricing, and the honest trade-offs are slower project completions and limited service hours.
With a rating of 4.7 from 14 reviews, Affordable Spray Foam is noted for its competitive pricing and friendly service. Many customers appreciate the clarity of their estimates and the transparency throughout the process. However, some reviews mentioned inconsistent follow-up communication. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is affordable insulation options. It serves Charleston, SC, with $1.00 to $2.50 per square foot pricing, and the honest trade-offs are inconsistent follow-up and limited availability.
USA Insulation of Charleston holds a perfect rating of 5 from 7 reviews, with clients praising their expertise in insulation solutions. They are particularly noted for their energy-efficient products. However, as a newer entrant, they have fewer reviews, making their long-term reliability somewhat uncertain. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is energy-efficient insulation options. It serves Charleston, SC, with $1.50 to $3.00 per square foot pricing, and the honest trade-offs are fewer reviews and less established.
Atlantic Spray Foam Charleston also enjoys a perfect rating of 5 from 7 reviews, noted for their thorough installation process and customer satisfaction. Clients appreciate their attention to detail and knowledgeable team. A drawback is that they may not offer the lowest prices in the market. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is thorough insulation installation. It serves Charleston, SC, with $1.50 to $3.00 per square foot pricing, and the honest trade-offs are not the lowest prices and limited service area.
IBP Charleston has a 4.5 rating from 21 reviews, recognized for their comprehensive insulation services and knowledgeable staff. Customers appreciate their efficiency and professionalism. However, some reviews mentioned that their pricing can be on the higher side compared to competitors. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is comprehensive insulation services. It serves Charleston, SC, with $1.50 to $3.00 per square foot pricing, and the honest trade-offs are higher pricing and variable customer service experiences.
Easy Way Insulation holds a 4.4 rating from 11 reviews, with customers praising their straightforward service and friendly team. They provide a range of insulation solutions but may not have the same depth of experience as top-rated competitors. Some reviews noted slow response times. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is straightforward insulation services. It serves Charleston, SC, with $1.00 to $2.00 per square foot pricing, and the honest trade-offs are slow response times and less experienced staff.
Thermolators - Spray Foam Insulation is a promising but unproven option, holding a perfect rating of 5 from just 1 review. The customer praised their quick and efficient service. However, the limited review base raises questions about their long-term reliability and overall service quality. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is quick insulation services. It serves Charleston, SC, with $1.50 to $3.00 per square foot pricing, and the honest trade-offs are unproven track record and limited reviews.
Insulate Carolina has a 4.4 rating from 7 reviews, with some customers appreciating their value for money and quality of work. However, the limited number of reviews and inconsistent service experiences have left some potential clients cautious about choosing them. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is value-oriented insulation solutions. It serves Charleston, SC, with $1.00 to $2.50 per square foot pricing, and the honest trade-offs are limited reviews and inconsistent service experiences.
How to choose an insulation contractor in Charleston
Choosing the right insulation contractor is crucial for ensuring your home remains energy-efficient and comfortable. Here are some key factors to consider:
Check Reviews
Look for contractors with consistently high ratings and positive customer feedback.
Compare Services
Different contractors may offer various insulation types and services. Ensure they meet your specific needs.
Get Multiple Quotes
Request quotes from several contractors to compare pricing and services before making a decision.
Ask About Experience
Choose contractors with a proven track record and expertise in insulation installation.
What it costs
What insulation costs in Charleston
The cost of insulation services can vary based on the type of insulation and the size of the project. Here's a general pricing breakdown:
Spray Foam Insulation$1.50 to $3.00 per square foot, depending on the thickness and type.
Fiberglass Insulation$0.50 to $2.00 per square foot, based on material and installation complexity.
Cellulose Insulation$0.75 to $2.50 per square foot, often used for retrofitting existing homes.
Reflective Insulation$1.00 to $2.50 per square foot, suitable for attics and roofs.
Frequently asked questions
How much does insulation cost in Charleston?
Insulation costs typically range from $1.00 to $3.00 per square foot, depending on the type and complexity of the installation.
What type of insulation is best for my home?
The best insulation type depends on your home's specific needs and structure. Spray foam, fiberglass, and cellulose are common options.
How often is this ranking updated?
We re-run the full analysis monthly with fresh review data. Last updated June 13, 2026.
Our verdict
For most Charleston homes: Extreme Spray Foam of Charleston
The top three insulation contractors in Charleston are Extreme Spray Foam of Charleston, New Leaf Sprayfoam, and Palmetto Spray Foam Insulation. Each offers unique strengths, from exceptional customer service to competitive pricing, making them excellent choices for homeowners in need of insulation solutions.