Insulate your walls to stop heat loss and quiet your Connecticut home
Walls are the largest surface of your building envelope. Dense-pack cellulose and injectable foam can fill them without removing drywall, and Energize CT rebates cover 75 to 100 percent of the cost for eligible Eversource and United Illuminating customers.
What properly insulated walls deliver
No more cold walls in winter or hot spots in summer. Stable indoor temperatures throughout the year, no matter which direction a room faces.
Wall insulation acts as a sound barrier, muting traffic and neighbor noise. Families in busier Connecticut cities notice the difference most.
Less heat escaping through your walls means your heating and cooling system runs less and lasts longer. Families who go through the HES visit typically receive about $1,000 in weatherization services — and see $70–$100 in savings on their annual energy bills, with additional rebates and upgrades available afterward.
How the work is done
How we insulate finished walls without tearing them open
Dense-pack fills wall cavities through small holes without opening the wall
No renovation required. Our specialists drill a row of small access holes in the finished wall, inject dense-pack cellulose or injectable foam until the cavity is completely full, then patch and finish the holes — leaving walls intact.
- A dense fill leaves no gaps or settling, stopping the convective heat loss that makes walls feel cold
- Works on already-finished walls without disrupting drywall or interior surfaces
- Result: steadier temperatures, less outside noise, and a quieter home
The right material depends on your wall construction and Connecticut's climate zones
Vapor permeability matters as much as R-value. Connecticut sits in IECC climate zones 5 and 6, where exterior walls should reach R-20 to R-25. We match vapor permeability to the wall assembly so walls manage humidity instead of trapping it.
- Dense-pack cellulose and injectable foam suit enclosed, finished walls
- Batt and rigid foam are better for open framing or exterior work during a siding replacement
- Proper moisture management prevents mold during humid CT summers and wet winters
Insulation rebates cover 75-100% of your project
Between Energize CT and federal tax credits, most CT families pay little to nothing for qualifying insulation work.
Energize CT insulation rebates
75-100% covered
As an Energize CT Authorized Contractor, HCP helps you access rebates funded by your utility bill. Your home energy audit copay is just $40.
- $2.00/sq ft insulation rebate
- 75-100% of total project cost covered
- Includes attic, wall, basement, and crawl space
Financing for insulation projects
Low-rate financing
For the portion not covered by rebates and credits, flexible financing helps you start insulating now.
- Smart-E Loan low fixed rates for energy improvements
- On-bill financing pay through your monthly utility bill
Connecticut families trust HCP with their insulation
Need guidance?
Our team can answer any questions about wall insulation during your free estimate.
Insulate every part of your home
Each area has unique challenges. We match the right material and technique to each space.
Attic Insulation
The single biggest impact on home comfort and savings
Wall Insulation
Dense-pack or injection foam for existing walls
Basement Insulation
Stop moisture and heat loss below grade
Crawl Space
Encapsulation and insulation for forgotten spaces
Floor Insulation
Comfort underfoot and over unconditioned spaces
Duct Insulation
Seal and insulate ductwork to stop energy waste
Ceiling Insulation
Block heat loss through ceilings below unheated space
Foundation Insulation
Insulate foundation walls and rim joists at the base of the home
Compare insulation materials
Every material has strengths. We help you choose based on your home’s needs.
Cellulose Insulation
Recycled content, excellent dense-pack performance
Spray Foam Insulation
Air seal and insulate in one step
Batt Insulation
Cost-effective for open cavities and new construction
Rigid Foam Board
High R-value per inch for basements and foundations
Find out what wall insulation would cost for your home
Energize CT rebates may cover 75-100% of your wall insulation costs for eligible Eversource and United Illuminating customers.