Window Capping in Toronto & the GTA

Window capping is custom-bent aluminum that covers the exterior wood trim, brickmould and sills around your windows. It creates a weather-tight, maintenance-free shell that protects the wood from moisture and UV damage, so you no longer have to scrape and repaint every few years.

Capping is commonly installed with new windows, but it can also be added to existing windows whose frames are still sound, extending their life and refreshing the look of the house.

Window sills take the brunt of the weather. Water sits on them after every rain and snow melt, which makes them one of the first places rot appears on a home's exterior.

The most important step happens before any aluminum goes on: inspecting the wood. Any soft or rotted sections are cut out and replaced so the capping is fastened to solid material. Covering rot only hides it.

The aluminum is then measured and bent on-site to follow each window's profile. Sills are formed with a slight slope so water runs off rather than pooling, and every joint is lapped and sealed so water can't work its way behind the metal.

Crisp, uniform window trim makes a big difference to how a house looks from the street. Aluminum capping is available in a wide range of colours, so you can match your windows, contrast with your siding or tie the trim into your soffit, fascia and eavestroughs for a coordinated look.

Window capping is often done alongside new siding, because the trim details around windows are where siding and windows meet. Planning both together ensures the flashing, trim and capping all work as one water-shedding system.