Compare the highest-rated insulation professionals in Charleston, South Carolina. All contractors are licensed, insured, and verified through our rigorous screening process.
Koala Insulation is a highly-rated, modern provider that emphasizes education and energy efficiency. They are known for their thorough assessments and detailed explanations, helping homeowners choose the right solution between blown-in cellulose, spray foam, and fiberglass batts. They strongly focus on air sealing as a critical component of an effective insulation system.
As the name implies, this company is a specialist in injection foam and spray foam insulation solutions. They are an excellent choice for hard-to-insulate existing walls and for creating high-R-value, air-tight seals in new construction or major renovations. Their expertise is particularly valuable for Charleston's humid climate, as spray foam acts as a moisture barrier.
Palmetto Insulation Group is a well-established local contractor with a broad service range, from residential to light commercial. They have a strong reputation for professionalism and quality workmanship across all insulation types. They are a reliable choice for whole-home projects, including attic insulation upgrades and basement/crawl space encapsulation.
The insulation market in Charleston is robust and competitive, driven by the city's hot, humid climate and a mix of historic and new construction homes. The average quality of service is high, as contractors must be well-versed in managing moisture intrusion and humidity control to prevent mold—a critical concern in this region. Competition is strong among established local companies and a few regional franchises, which helps keep pricing relatively fair. Typical pricing is influenced by the project's scale and material choice. As a general guide: * **Blown-In Attic Insulation:** $1,500 - $4,500 * **Spray Foam (Open Cell):** $2.00 - $4.50 per board foot * **Spray Foam (Closed Cell):** $4.50 - $7.50 per board foot * **Wall Insulation (Retrofit):** $1.50 - $3.50 per square foot Homeowners are increasingly aware of energy efficiency, and many providers are knowledgeable about local rebates from utilities like Dominion Energy and federal tax credits for specific insulation upgrades. It is always recommended to get at least three detailed quotes, ensuring each includes a comprehensive energy audit and air sealing proposal.
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with Charleston regulations and climate
Get answers to common questions about insulation services in Charleston, South Carolina.
For our climate, spray foam insulation, particularly closed-cell, is often the most effective long-term investment despite a higher upfront cost. It provides an excellent thermal barrier and a critical air and moisture seal, which is vital for managing Charleston's humidity and preventing mold. For budget-conscious projects, high-performance blown-in fiberglass or cellulose in attics can also offer significant energy savings, especially when paired with proper air sealing.
The ideal times are during our milder fall (October-November) and spring (March-April) seasons. This avoids the peak summer heat and humidity, which can make attic work particularly strenuous for crews and affect the curing of some materials. Scheduling during these shoulder seasons also ensures your home is optimally prepared before the intense summer cooling demand or occasional winter chill arrives.
While South Carolina has no statewide insulation code for existing homes, new construction follows the 2018 IECC. Importantly, local homeowners should inquire with their insulation contractor about rebates from Dominion Energy South Carolina for adding insulation, which can significantly offset costs. Always ensure your contractor is properly licensed and insured according to South Carolina law for home improvement contracting.
Look for established local contractors with specific experience in our coastal climate's challenges—namely moisture control and hurricane-related building practices. Verify they are licensed by the South Carolina Department of Labor, Licensing and Regulation (LLR), insured, and provide detailed, written estimates. Ask for local references and check reviews to see how they handle Charleston's unique attic heat and humidity issues.
For historic homes, specialized solutions are required. Dense-pack cellulose or blown-in fiberglass can often be installed in existing wall cavities through small, discreet holes that are easily repaired. For crawl spaces and attics, careful installation of spray foam or batt insulation can improve performance while preserving architectural integrity. Always consult with a contractor experienced in historic Charleston homes to ensure any work meets local preservation guidelines.