Cantilever Insulation in Northern Virginia and Maryland
Does your home have a bump-out or overhanging floor that always feels colder than the rest of the house? That’s a classic sign of poor or missing cantilever insulation. These architectural features look great but often lack proper air sealing, leading to cold drafts and energy waste.
At Northern Virginia Foam, we offer professional spray foam insulation specifically designed for cantilevered floors, balconies, and bay windows. As a trusted spray foam insulation contractor, we help homeowners across Northern Virginia and Maryland eliminate uncomfortable cold zones and improve overall efficiency.
About Cantilever Insulation Service
Cantilevered floors — also known as overhangs, bump-outs, or bay extensions — are notorious for poor insulation. These architectural elements are often framed beyond the home’s foundation, leaving them exposed to outside temperatures on multiple sides. Without proper house insulation, they become a weak point for heat loss, moisture intrusion, and uncomfortable floors, especially in colder months.
At Northern Virginia Foam, we address this issue head-on with our specialized cantilever insulation service. Our process begins with a thorough inspection of your overhang’s framing, subfloor, and cavity spaces. Many homes — especially those built before 2000 — have minimal or no insulation in these areas, leading to major energy loss and cold spots above.
To fix it right, we remove any damaged or insufficient material and apply high-performance closed cell spray foam into the cavities. This type of insulation expands to fill every gap and seals the entire overhang, blocking drafts and locking in heat. It also acts as a moisture barrier, preventing condensation and protecting your subfloor from potential rot.
This upgrade is especially important for rooms built over garages, kitchen extensions, bay windows, or bonus rooms. We've improved cantilever insulation for homes in McLean, Vienna, Silver Spring, and other surrounding areas — helping clients stay warm and cut energy waste. If you're a contractor or property owner working on a remodel or addition, we also offer residential and commercial foam insulation options for new builds and retrofits.
Choosing a local insulation company near me means working with professionals who understand how climate, architecture, and construction methods affect comfort and energy efficiency. Let us help you turn that chilly bump-out into a warm, well-insulated part of your home.