Stop Air Leaks Before Next Winter

Professional spray foam insulation installation for homes and buildings in Naperville, Illinois.

When cold air pushes through wall cavities and attic spaces during a Naperville winter, your heating system runs longer than it should. Spray foam insulation seals those gaps by expanding into cracks, voids, and openings that fiberglass batts cannot reach. You notice the difference when your furnace cycles less often and upstairs rooms hold temperature more consistently.

Windy City Insulation installs both open cell and closed cell spray foam depending on where the insulation goes and what performance level you need. Open cell foam works well in interior walls and attics where air sealing and sound dampening matter. Closed cell foam provides a vapor barrier and higher insulation value per inch, making it the right choice for basement walls, crawlspaces, and exterior applications. Both types reduce air leakage, control moisture movement, and improve overall energy efficiency in Northern Illinois climates with hot summers and cold winters.

If you want to see how spray foam insulation can help your Naperville property, reach out to schedule a free consultation.

How Open and Closed Cell Options Work

The crew applies spray foam using specialized equipment that mixes two chemical components at the nozzle, causing the material to expand and harden within seconds. In a Naperville attic, open cell foam expands to fill rafter bays and seals around roof penetrations, ductwork, and wiring. Closed cell foam goes on thinner but creates a rigid, moisture-resistant barrier that adds structural strength to walls and foundations.

After installation, you will notice that rooms feel more stable in temperature and drafts around outlets or baseboards disappear. The foam stays in place permanently and does not settle or shift like loose-fill materials. Air sealing reduces the load on your heating and cooling equipment, which often results in lower monthly utility costs.

Installation requires proper ventilation during application and curing time before the space can be reoccupied. The crew covers windows, floors, and fixtures to protect them from overspray. Spray foam works in attics, walls, basements, crawlspaces, and commercial or industrial structures. It does not replace the need for proper ventilation in attics or moisture control in basements, but it does form part of a complete thermal and air barrier system.

Questions People Ask Before Installing Foam

Homeowners and property managers often want to know how spray foam differs from other insulation types, how long it lasts, and whether it makes sense for their building. The answers depend on where the insulation goes, what performance goals you have, and how the rest of the building is constructed.

What is the difference between open cell and closed cell spray foam?
Open cell foam is lighter, more flexible, and expands more during application, making it ideal for interior walls and attics where air sealing and sound control matter. Closed cell foam is denser, adds structural rigidity, and acts as a vapor barrier, so it works better in basements, crawlspaces, and exterior walls where moisture control is necessary.
How long does spray foam insulation last?
Spray foam does not settle, sag, or degrade over time when installed correctly. It remains effective for the life of the building, and you will not need to replace or top it off like blown-in or batt insulation.
Why does spray foam reduce energy costs?
Spray foam stops air from moving through walls, ceilings, and floors, which means your heating and cooling systems do not have to compensate for constant air exchange. When conditioned air stays inside, your furnace and air conditioner run less often.
When should I use closed cell foam instead of open cell?
Use closed cell foam in areas where moisture control, structural reinforcement, or maximum insulation per inch matter, such as basement walls, exterior walls, and crawlspaces. Open cell foam works well in attics and interior walls where air sealing and soundproofing are the main goals.
How soon can I use the space after installation?
You typically need to stay out of the space for a few hours while the foam cures and off-gasses. The installer will let you know the exact reoccupancy time based on the product used and ventilation available.

Windy City Insulation has been installing spray foam in Naperville and throughout Northern Illinois since 2017. The crew arrives with the right equipment, prepares the work area carefully, and cleans up thoroughly after the job is done. If you want to discuss open cell or closed cell options for your property, call today to schedule a free estimate.