Window Repair

Begin by thoroughly examining the entire window unit. Look for any visible cracks, chips, or missing pieces in the glass panes. Check the window sash for rot, warping, or loose joints. Inspect the weatherstripping for signs of wear, such as cracking, tearing, or compression, which can indicate air leaks. Also, assess the condition of the frame and any hardware like locks or hinges. Document all findings to plan the repair strategy.

If replacing glass, begin by carefully removing any remaining broken glass. Use a putty knife to gently pry out larger pieces. For smaller shards and old glazing compound, use a chisel or stiff brush. Once all loose glass is removed, scrape away all old putty, sealant, and paint from the sash rebate (the groove where the glass sits). A stiff wire brush or sandpaper can be used to ensure the rebate is clean, smooth, and free of debris. Wipe down the rebate with a tack cloth or damp rag to remove fine dust.

Measure the opening precisely after cleaning the rebate. Order or cut a new glass pane to fit. Carefully place the new glass pane into the cleaned rebate. Ensure it is centered and has even spacing all around. Insert glazing points every 6-8 inches around the perimeter to hold the glass securely in place. Next, apply glazing compound (putty) around the edge of the glass, pressing it firmly into the gap between the glass and the sash. Smooth the compound with a putty knife to create a neat, beveled edge, ensuring it extends slightly over the glass and onto the sash for a good seal.

For minor rot or cracks in the sash, carefully excavate the damaged wood using a chisel or utility knife until you reach sound wood. Clean the area thoroughly. If dealing with rot, use a wood hardener to stabilize the remaining wood. Then, fill the void with a durable exterior-grade wood filler or epoxy filler, packing it in firmly. For loose joints, you may need to carefully disassemble them, clean them, apply exterior wood glue, and re-clamp them until dry. If you had to add significant filler, allow it to cure fully according to the product's instructions. Once cured, sand the repaired areas smooth and flush with the surrounding wood.

Carefully peel or cut away the old weatherstripping from the window sash and frame. Use a putty knife or scraper to remove any adhesive residue. Clean the channels or surfaces where the new weatherstripping will be applied. Select the appropriate type of weatherstripping (e.g., vinyl, foam, or felt) that matches the original or provides a suitable seal. Measure and cut the new weatherstripping to length. Starting at a corner, press the new weatherstripping firmly into place, ensuring it creates a snug fit without being overly compressed, which can hinder window operation. For adhesive-backed types, peel the backing as you go. For compression seals, ensure even pressure is applied.

After all repairs to the sash and frame are completed, and any wood filler or glue has fully cured, it's time for finishing. Lightly sand any rough spots or edges of the repaired areas to ensure a smooth surface. Wipe away all dust with a tack cloth or damp rag. Apply a coat of high-quality exterior primer to the repaired sections, feathering the edges into the surrounding paint. Allow the primer to dry completely according to the manufacturer's recommendations. Then, apply one or two coats of exterior-grade paint, matching the original color and finish of the window. Ensure even coverage and smooth brush strokes for a professional look.