
Cold floors, drafty walls, and rising heating bills often trace back to gaps in your home's envelope. Closed-cell foam seals those gaps and delivers the highest insulating value per inch available - built for Vermont's demanding winters.

Closed-cell foam insulation in South Burlington is a spray-applied material that expands, hardens, and seals air gaps on contact, most residential jobs cover crawl spaces or rim joists in a single day, and the result is a dense, permanent barrier that outperforms fiberglass and blown-in materials at the same thickness.
South Burlington homes built before 1990 were constructed under energy standards that are far below what Vermont requires today. Crawl spaces, rim joists, and exterior wall cavities in those homes are common entry points for cold air - and standard insulation materials often cannot seal them adequately. Closed-cell foam addresses both insulation and air sealing in one step, which is why it performs so well in Vermont's climate.
For a broader look at your home's insulation needs, closed-cell foam pairs well with open-cell foam insulation in interior applications where cost is a priority and moisture resistance is less critical.
If your first floor feels cold in wool socks on a January morning, the space below - a crawl space or unheated basement - is not properly insulated or sealed. In South Burlington's winters, an uninsulated crawl space acts like a refrigerator directly beneath your living area. This is one of the most common complaints homeowners here have before getting foam installed.
If your gas or electric bill has risen noticeably over the past few winters but your habits have not changed, air leakage is often the culprit. Vermont's heating season is long and demanding, and even moderate air leakage adds up to hundreds of dollars a year. A home energy audit - which Efficiency Vermont can help arrange - often points directly to the spots where foam insulation would help most.
Hold your hand near an electrical outlet on an exterior wall on a cold day. If you feel cool air moving, that wall cavity is connected to the outside. The same test works along baseboards and at the bottom of interior stairwells. These drafts are signs your home's air barrier has gaps - exactly what closed-cell foam is designed to fix.
Homes built in South Burlington before the mid-1980s were constructed under much looser energy standards than exist today. If you have never had insulation work done and your home is from that era, there is a high probability your rim joists, crawl space, and possibly your attic are underperforming. The age of the home is reason enough to get an assessment.
We apply closed-cell foam in crawl spaces, basement rim joists, attic roof decks, and exterior walls - the spots in South Burlington homes where cold air infiltration causes the most trouble. Before spraying, we check for moisture and structural issues that need to be addressed first. The result is consistent coverage at the right thickness, with no gaps along edges or framing. We also offer spray foam insulation as a broader service category that covers both open- and closed-cell applications depending on where in the home the work is being done.
If you are comparing material options, closed-cell foam costs more per square foot than open-cell foam insulation but delivers higher R-value per inch and acts as a vapor barrier - making it the better choice for below-grade applications and any area where moisture resistance matters alongside thermal performance.
Best for homes with vented or uninsulated crawl spaces where both cold-air intrusion and moisture management are concerns.
Targets the most common single source of heat loss and air infiltration in older South Burlington homes - fast to install and immediately noticeable in comfort.
Suited for renovation projects where walls are open and the homeowner wants the highest performance possible in the available depth.
Creates a conditioned attic space by sealing the underside of the roof deck - ideal when ductwork or HVAC equipment is located in the attic.
South Burlington sits in a climate zone where winter temperatures regularly drop well below zero and heating season stretches from October through April. Closed-cell foam's combination of high insulating value per inch and air-sealing is particularly well-matched to this climate, because even small gaps in a standard insulation job become very expensive over a Vermont winter. Many of the city's homes - especially ranch-style and split-level buildings from the postwar decades - have vented crawl spaces or exposed rim joists insulated with old fiberglass batts that have sagged and lost their effectiveness. Closed-cell foam applied directly to those areas is one of the most cost-effective improvements a South Burlington homeowner can make.
We serve homeowners in Williston, VT and Colchester, VT who face the same conditions - older housing stock, cold winters, and crawl spaces that have never been properly addressed. Efficiency Vermont rebates and the federal energy efficiency tax credit can reduce your out-of-pocket cost meaningfully - ask us what your project qualifies for.
The Spray Polyurethane Foam Alliance publishes installation best practices and installer certification resources. The U.S. Environmental Protection Agency offers guidance on safe installation and re-entry times for spray polyurethane foam.
We get back to you within one business day. We ask a few basic questions - what area you are concerned about, roughly how old the house is, and whether you have noticed cold floors or high heating bills - so we come prepared with the right equipment and a realistic time estimate.
We walk through the areas you want insulated, take measurements, check for moisture or structural issues, and explain what we recommend and why. You receive a written estimate covering the area to be treated, the thickness of foam to be applied, and the total cost - not a ballpark.
If your project requires a permit, we handle pulling it before work begins. Once permits are in order, we schedule the installation date and confirm how long you and your household will need to be out of the home - typically one day plus one overnight.
The crew works through the designated areas methodically. Most residential jobs are completed in a single day. We do a walkthrough before we leave to confirm the work is complete, and provide documentation needed for any Efficiency Vermont rebate or federal tax credit application.
No obligation. We will assess your crawl space, rim joist, or walls and give you a written quote you can compare at your own pace.
(802) 352-8211We check for moisture on every surface before foam goes on. Closed-cell foam applied over damp wood or concrete can trap water and cause rot or mold behind the insulation. This prep step is not optional for us - it is how we protect your investment.
Good closed-cell foam work means applying material at a consistent thickness across the entire surface - no thin spots, no gaps along edges. We measure as we go and do not rush a job to hit a price point. Uneven coverage means uneven performance.
Between Efficiency Vermont rebates and the federal energy efficiency tax credit, a well-planned foam project in South Burlington can come back to you in real money. We are familiar with both programs and provide the documentation you need to claim what you are entitled to.
The Spray Polyurethane Foam Alliance publishes training and quality standards for foam installers. We follow those standards. Homeowners who ask about installer training get a straight answer from us - not a deflection.
When you hire us for closed-cell foam insulation in South Burlington, you get the job done to a standard you can see and verify - not one you have to take on faith. That is what makes the difference between insulation that performs for decades and insulation that disappoints from the first Vermont winter.
A lower-cost foam option suited for interior walls and attic cavities where moisture barriers are less critical than in below-grade applications.
Learn MoreOur full spray foam service covers both open- and closed-cell applications across every area of your home - from attic to crawl space.
Learn MoreLock in your installation date before the fall rush fills our calendar and be ready before the first hard freeze hits South Burlington.