As a window repair professional, I understand the challenges homeowners face in dealing with wood rot. Rain and humidity can easily find their way into your wood trim, doors, and window sills, causing decay. But don’t worry, I’m here to help you stop the spread and teach you how to repair a rotted wood window frame with epoxy.

To fix your rotted window frame, you’ll need the following tools and materials:

  • Chisel (a flathead screwdriver will work too)
  • Drill (or hammer for larger areas)
  • Epoxy wood consolidant
  • Epoxy wood filler
  • Sandpaper or sanding block
  • Putty knife
  • Paintbrush
  • Paint

1. Inspect the Damage

First, let’s examine the condition of your window frame. Determine if the window frame can be repaired or if it’s damaged beyond repair. If more than 10% of the wood frame is damaged, consider replacing it with a new windows or hire the professional service.

2. Remove the Rotted Parts

Next, gather your chisel or flathead screwdriver and a brush. Begin by scraping the rotted parts with the chisel or screwdriver until you reach healthy wood. Then, gently use the brush to clean away the debris.

3. Drill Holes into the Frame

Now, grab your ¼-inch bit driller/driver and drill holes into the healthy wood, spacing them about an inch apart. This will help the fillers securely hold onto the wood. Afterward, use a brush to dust off any debris.

4. Apply Epoxy Wood Consolidant

Cover each hole you drilled with epoxy wood consolidant. Wait for 5 to 10 minutes for it to dry, allowing the wood to absorb the epoxy. Once dry, apply a second layer of epoxy.

5. Apply the Filler to the Frame

To restore the window frame to its original dimensions, apply a generous amount of filler onto the damaged area and mold it to match the shape of the frame. Use a putty knife to press the filler firmly into place, and let it dry for about 24 hours or the recommended waiting time on the label.

6. Prep and Paint the Frame

Prepare the window frame for painting by using rough-grit sandpaper to level the hardened epoxy with the frame. Then, use fine-grit sandpaper to create a smoother surface. Wipe away any debris and dust with a rag, ensuring a clean surface for painting.

Choose a good exterior paint and a color that complements your other exterior window frames. Apply painter’s tape alongside the frame to protect the glass before you begin painting. Use clean brushes to paint the frame with an up and down motion, taking your time for the best results.

Choose Professional Window Repair With’s window repair experts take pride in delivering exceptional service and top-notch workmanship. We guarantee customer satisfaction by ensuring we complete your window repairs with the highest level of care and attention to detail, keeping your home safe from the elements.

Before attempting a DIY window repair project, consider the advantages of placing your trust in the professionals at for your home’s window needs. Reach out to us today, and let our experienced team assist you in bringing your windows back to their original splendor and functionality while offering you peace of mind and a stress-free experience.