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Drill and Fill Exterior Wall

In homes and businesses where there is minimal existing insulation, Virginia Foam can work with homeowners to provide the Drill-And-Fill Method to exterior and interior walls. For Open-Cell foam we drill up to a 1 inch hole between the wall studs, allowing sprayers to access the wall cavity and inject Open-Cell foam. For Blown-In Fiberglass we drill up to a 3 inch hole. These holes are then plugged up and all siding is reinstalled. For wood siding, our wood pegs can be sanded and painted so as not to leave marks. Our seasoned insulation experts will help you choose the material that is right for your home.

Minimum Recommendation

To get the simplest impact of insulation, customers are encouraged to install Blown-In Fiberglass. This product is cheaper than spray foam insulation but will also provide some energy savings. Homeowners will notice a significant improvement in their climate control when insulation is installed. While this less expensive measure will show homeowners the benefits of insulation, the product does not create a seal at the edges and, as insulation compresses over time, gaps can form at the top of the wall cavity.

Maximum Recommendation

Install Open-Cell Spray Polyurethane Foam into the wall cavity. As this foam rapidly expands within your walls, it covers and closes all cracks to create an air-tight seal. As the foam expands to fill all gaps and dries in place, you can be sure it will not compress, melt or fall away, giving you a more comfortable home for years to come.

Interior Wall Removal

In the case of a total home renovation, the removal of the drywall from interior walls presents a great opportunity to apply new insulation. Fortunately, your insulation choices during a renovation are no different than those available on a new construction. Because there are so many options in a renovation, we provide our recommendations for insulating walls from the interior here.

Minimum Recommendation

Install the Blown in Blanket (BIB), also known as the Mesh Netting & Blown Fiberglass, in the wall cavity. While polyurethane spray foam is ideal, our BIB insulation system fills all crevices and areas not normally filled with standard batt insulation, thus creating a more complete barrier to heat and cold, in addition to reducing noise transfer. Improve your home’s heating and cooling loss no matter how thin your budget with this practical solution.

Mid-level Recommendation (Option 1)

By spraying at least a 1 inch average layer of Closed-cell spray Polyurethane foam between the wall studs and then overlaying the foam with Fiberglass, you create what is known as a flash & batt system. The idea behind the system is to fill in the gaps with cheaper material and use the more expensive spray foam sparingly for sealing and balancing out the code requirements. When these two materials are installed together, they get better results than either would on their own.

Mid-level Recommendation (Option 2)

Open-Cell Polyurethane Spray Foam is a cheaper way to get the full seal you need. Upon spraying, this foam will expand up to 150 times its liquid volume, filling every crack and crevice of your wall cavity. After this process is complete, the excess foam is shaved off the studs, leaving a flat surface over which dry wall or other material can be applied. Providing a more efficient process than the Flash and Batt insulation system, this method gives the full seal you require for less.

Maximum Recommendation

Install a 2-inch average of Closed-Cell Spray Polyurethane Foam to the wall cavity. This highly dense material will expand up to 30 times its original liquid volume inside your wall, adding an R-value of 6.3 per inch. It fills in all the nooks and crannies like Open-Cell foam, but also provides an air-barrier, vapor barrier, and enhanced structural integrity. Closed-Cell Polyurethane Spray Foam is the most expensive insulation option, but presents the homeowner with the best insulation performance available.

Complete Siding/Exterior Sheathing Removal

On some homes, replacing outdated siding or performing an exterior renovation can be a blessing in disguise. By removing all exterior siding and applying insulation directly to the wall cavity you give your home an entirely new barrier against energy loss, while not creating any mess in your house. To insulate the wall after complete removal of any siding and sheathing, Virginia Foam Insulators recommends the use of our Polyurethane Spray Foam products.

Minimum Recommendation

Because you are spraying all wall cavities and studs, Open-Cell Polyurethane Spray Foam is your best bet. Cheaper than the Closed-Cell foam, the Open-Cell variety provides significant expansion within the wall cavity, covering and sealing all nooks and crannies and preventing all points of air infiltration into your home. Once the foam expands, the excess is shaved off to lay flush with the studs to allow for the reinstallation of the external sheathing and new siding. This product stops air flow in the wall and will not compress, sag or fall away over time.

Maximum Recommendation

Install a minimum of at least a 2-inch average of Closed-Cell Polyurethane Spray Foam to fill out each stud cavity and the complete wall. This product is more expensive than the Open-Cell Polyurethane Spray Foam product because of the density of the foam. Because it is denser, at 2 inches it provides the homeowner with an air barrier, a vapor barrier, as well as improved structural strength.

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