Low-expansion foam and sealant in the gap around the frame, closing a path for drafts and energy loss.
The window itself may be tight and efficient, but the gap between the frame and the wall can leak plenty of air. Old windows were often packed with scrap fiberglass or nothing at all, and that gap is where drafts and cold spots start. Insulating and air sealing that gap is one of the most effective, least expensive steps in a window project. Homeowners in Nashville ask for it with replacement windows and also as a separate upgrade for existing windows.
When we install a replacement window, we fill the gap with low-expansion foam made for windows, which seals without pushing the frame out of shape. We also seal the exterior and interior edges with the right sealant. For existing windows, we remove trim where needed, insulate and reinstall it, or seal from the outside. We check for gaps, cracks and missing insulation and explain what we find so you can see where the air was getting in.
A quarter inch of space around a frame can leak as much air as an open crack, and it lets in dust and sound too.
Window foam fills gaps without bowing the frame, which keeps the sashes working smoothly.
Exterior sealant keeps water out, and interior seals stop air from moving through the wall cavity.
We can seal around windows you are keeping, often by removing the trim, insulating and reinstalling it.
Drag the handle to compare.
BeforeAfterFoam where air leaks.
No bowed frames.
Sealant on both sides.
Trim removed and refit.
Fewer drafts and cold spots.
You see where it leaked.
Every topic has its own page with what to expect and how we approach it.
Top brandSashcoA family-owned maker of sealants and stains for windows, logs, siding and other exterior and interior surfaces.Learn more 
Top brandFrost KingA brand of weatherization products, including weatherstripping, window insulation kits and sealing materials.Learn more Top brandM-D Building ProductsA maker of home products that include weatherstripping, sealing items and replacement parts for windows and doors.Learn more Answer five questions about your windows, goals and timing to see which services to start with.
You tell us what you want or what the windows are doing, and we set an estimate visit that fits your day.
We measure each opening, check the frames, sills and trim for rot and note options for style, glass and installation method.
You get a plain written scope with the window models, glass packages, trim and schedule, and you approve it before anything is ordered.
The windows are ordered or made to your sizes, inspected when they arrive and the work areas are protected.
We remove the old windows, set the new ones plumb and level, flash, insulate, seal and trim each opening.
We clean up, haul away the old windows if you asked, walk you through the finished work and explain how to care for them.
Low-expansion foam made for windows does not. Regular foam can bow frames, so we avoid it.
Often yes. It is a low-cost step with a noticeable effect on comfort.
Yes. We can seal around existing windows.
Yes, we remove old fiberglass scraps and install proper insulation and sealant.
No. It is covered by trim and sealant.
Window WeatherizationA practical package of seals, caulk, inserts and film that makes existing windows tighter and more comfortable.Explore 
Drafty Window RepairFind where air leaks in around windows and fix it with seals, caulk, foam and adjustments.Explore 
Window Caulking and SealingFresh exterior and interior caulk and sealant around frames and trim to stop leaks, drafts and bugs.Explore 
Energy-Efficient WindowsWindows chosen for comfort and efficiency, with low-E glass, gas fill and tight installation explained plainly.Explore Tell us about your project and we will call you back to set up a visit.
Or call (615) 357-7797 to talk now.
