Foundation insulation that protects your home from the ground up

In Connecticut, insulation should typically extend down to the frost line to prevent freezing damage and heat loss.

Yes. Interior insulation is commonly added using rigid foam or spray foam. Exterior insulation is more challenging but possible during major renovations or landscaping projects, though it may require excavation.

Foundation insulation projects typically run $1,500-$10,000 depending on size and material. Energize CT rebates of up to $2.00 per square foot can cover 75-100% of the cost.

Yes. Energize CT programs offer up to $2.00 per square foot for insulation recommended during a Home Energy Solutions assessment, covering 75-100% of costs. Our experts help you qualify.

Rigid foam board is typically best for basement walls due to its moisture resistance and thermal performance. Spray foam is also effective, especially for existing foundations. The right choice depends on your building's specific conditions.

Insulation itself does not waterproof a foundation, but it can be part of a system that includes proper drainage and waterproofing measures to protect against moisture.

Yes. By reducing energy loss and protecting against moisture and temperature fluctuations, foundation insulation improves your home's efficiency and durability. Energize CT rebates can cover 75-100% of costs.

It prevents heat loss, reduces the risk of frost damage, minimizes radon infiltration, and improves living-space comfort — particularly in colder climates like Connecticut.

Common types include rigid foam board, spray foam, and batt insulation. Each suits different applications and foundation structures.

Regular inspections are recommended to check for water intrusion, pest damage, and general wear, especially for exterior insulation.