Rotten Window Repair in Cos Cob, CT

When we got the call for rotten window repair in Cos Cob, CT, the homeowner was already concerned about the integrity of their large wooden bay window. Moisture had infiltrated the lower sill, causing rot to spread through the exterior casing and base molding. The damage wasn’t just cosmetic — decay like this can compromise the structure of the entire unit. We began by performing a full inspection to assess how deep the wood rot had penetrated and to determine what parts needed to be salvaged versus replaced.

After identifying the worst-affected areas, our team carefully removed the rotted window sill, apron board, and sections of compromised trim. We then treated the surrounding wood with a high-strength liquid hardener to stop further deterioration. In this Cos Cob, CT rotten window repair, we used custom-milled rot-resistant pine to match the original architectural details of the window. Precision fit and tight joints were key to bringing the frame back to its original form.

Before installing the new components, we thoroughly sealed the base of the window with flashing tape and applied a waterproof barrier to prevent future water intrusion. Once that was in place, we installed the new wood sill and trim, reinforcing the base with corrosion-resistant fasteners. Every piece was secured, caulked, and sanded down smooth to prepare for finishing. We always make sure our window repair process holds up to New England’s climate and moisture exposure.

Painting was the final phase, but not before we applied an oil-based primer to seal the wood grain. We then color-matched the surrounding siding and used high-grade exterior paint designed to withstand Connecticut’s seasonal shifts. By the time we were done, the damaged window looked brand new — and more importantly, it was structurally sound. From a rotting base to a fully rebuilt bay window, this rotten window repair in Cos Cob, CT was a complete turnaround.

Many older homes in Cos Cob have original wood windows that begin to rot over time due to poor drainage, clogged weep holes, or worn-out sealants. Once moisture enters and sits in the sill, rot can spread quickly. The good news is we can fix it before it becomes a replacement job. Our experience in wood window restoration means we can replicate and rebuild almost any architectural detail using long-lasting materials.

If you’ve noticed peeling paint, soft wood, or swelling around your window frames, don’t wait. Prestige Window and Door Repair specializes in rotten window repair in Cos Cob, CT and surrounding areas. We also offer wood sash restoration, casing replacement, and bay window rebuilding. Reach out for your free estimate — we’re just one call away from saving your windows.