Insulate behind finished walls with affordable and long-lasting blown-in fiberglass insulation. EnergySmart uses special materials that prevent settling so you can enjoy lower utility bills up to 100 years or longer.


For NEPA residents seeking an economical way to insulate existing exterior walls, rim joists, attic joists, or open framing cavities, blown-in fiberglass insulation offers a cost-effective and energy-efficient solution. It works especially well for enclosed or hard-to-reach areas where traditional insulation is difficult to install.

Featuring lightweight and dense materials, blown-in insulation can be installed behind existing walls and framing cavities with netting attached to fill voids in an already-finished home. 

Blown-in fiberglass insulation also boasts a similar R-value to fiberglass batts when properly installed over a small area. When installed to the recommended specifications and thickness, blown-in fiberglass gives homes a custom-designed, thermally efficient, and sound-reducing layer that completely fills voids, including irregular cavities. 

Naturally non-combustible and resistant to mold, blown-in fiberglass is a safe and effective product that lasts upwards of 100 years. Best of all, blown-in fiberglass insulation does not settle over time, so the installed R-value will remain consistent over the lifetime of your home.

Why NEPA Residents and Businesses Trust EnergySmart for Their Blown-In Fiberglass Insulation

Uninsulated Walls Can Be a Major Source of Energy Loss

Many residents focus exclusively on attic and basement insulation, but heat and cool air can escape through walls and rim joists, severely undercutting your existing insulation’s performance. The only thing standing between the outside and your home’s interior is a thin layer of sheetrock and drywall that does little to stop heat loss. 

Hidden between your exterior and interior walls are large empty cavities where moisture and pests can settle. 

Not only does a lack of insulation contribute to poor energy usage, but it also allows sounds and allergens to travel freely throughout your home, disrupting your comfort. 

Blown-In Fiberglass Is the Best Solution for Exterior Walls in NEPA

Blown-in fiberglass insulation is versatile and affordable, allowing you to insulate your exterior walls on a budget without having to renovate your home. Using a small hole drilled through the exterior of your siding, our blower machine can fill in empty wall cavities with blown-in fiberglass, creating a thick layer of insulation resistance that will increase home comfort year-round. 

If you’re worried about settling compromising your insulation performance in attics or rafters, we employ a special material design that prevents settling and increases the lifespan of your fiberglass insulation so you never have to worry about replacing it again. 

In addition, we offer air sealing services that help support your insulation’s performance and prevent premature settling. 

Why Insulate Your Home with Blown-In Fiberglass?

Blown-In Fiberglass Insulation FAQs

How Is Blown-In Fiberglass Manufactured?

Blown-in fiberglass consists of tiny glass particles heated to a liquid and then spun into tight, thin fibers. The most typical installation is in an attic floor, and drilling a hole in your existing wall through the stud is similar to injection foam or blown-in cellulose insulation

Once installed, the loose fibers are easily spread across an open cavity, filling any loose spaces behind your exterior wall. However, thanks to its tight composition, fiberglass won’t settle over time or diminish its R-value. 

Loose fiberglass typically comprises an R-value of 2.5 per inch and achieves an R-value of 19 over a ~100-square-foot region. In turn, blown-in fiberglass will significantly reduce your heating bills and provide a more comfortable home. As a bonus, blown-in fiberglass is also naturally sound-resistant and non-combustible. 

How Long Does Blown-In Fiberglass Last? 

By most accounts, blown-in fiberglass lasts upwards of 80 to 100 years. If you’re looking for a long-lasting and economical solution to your heating bills, contact the experts at EnergySmart about blown-in fiberglass insulation. It’s important not to disturb blown-in insulation and to air seal around existing insulation to prevent premature settling, moisture contact, or pests. 

Does Blown-In Fiberglass Settle Over Time?

EnergySmart’s technicians use specialized blowing equipment and dense-pack methods to ensure even coverage and consistent density within every cavity. This prevents air gaps and compression that can lead to energy loss and settling. With our precise installation, you can count on lasting performance for decades without worrying about voids or sagging insulation.

Will Installing Blown-In Fiberglass Disrupt My Home?

One of the biggest advantages of blown-in fiberglass is its non-invasive installation process. EnergySmart’s team drills small access points behind existing walls or attic joists and uses advanced blowing systems to fill voids completely—without tearing down drywall or creating major messes. Once the insulation is installed, access holes are sealed cleanly, and your home is left just as we found it—only more comfortable and energy efficient.