How to Repair Rotted Wood on an Exterior Window Frame

Rotted wood is usually an enemy of homeowners who make use of wooden window frames. Since window frames are usually exposed to external elements, especially moisture, there will come a time when rotted wood becomes a problem. Before the rot spreads to the entire window frame, it is best to repair it as soon as possible.

Step 1 – Inspecting the Effects of Rotted Wood

Before deciding to repair the window frame, make sure that it can be repaired first. Check if the rot has not infected a huge area of the frame, because if the rot has infected more than ten percent, then the best option is to replace it with a new one. However, small rotten areas can be repaired using epoxy products.

Step 2 – Removing the Rotted Materials

To remove the rotted parts of the window frame, use a chisel or screwdriver to gouge out the damage. Remove all infected wood until the healthy parts are revealed. Use a brush to scrub the surfaces and clean the debris afterwards.

Step 3 – Drilling Holes

Use a ¼-inch drill bit to drill holes on the area of the wood to be repaired. The holes will ensure that the fillers will have a secure hold onto the wood. The holes should be spaced about an inch from each other.  Make sure to clean the wood to get rid of dust and debris before proceeding with the next steps.

Step 4 – Applying Epoxy Wood Consolidant

Prep the consolidant according to manufacturer’s instructions. Apply it on the affected area, making sure to fill in the holes. Allow the wood to absorb the epoxy and apply a second coat when it dries. The thin layer of the consolidant will ensure that the wood is well strengthened before the application of the epoxy filler.

Step 5 – Applying the Filler

The filler will make the repair complete because it will allow the window frame to be restored to its original dimensions. To apply the filler, prep the product according to the manufacturer’s instructions. Place a good amount of the product onto the damaged area and mold it to conform to the shape of the window frame. Use a putty knife to press the filler firmly into place. Allow the product to dry for about 24 hours or the recommended waiting time.

Step 6 – Prep the Window Frame for Painting

Use a rough grit sandpaper to level the hardened epoxy with the window frame. Use a fine grit sandpaper afterwards to create a smoother surface. Wipe the surfaces with a rag to remove dust and other debris.

Step 7 – Paint

When painting an exterior window frame, make sure to choose paint that is designed for outdoor use. Choose a color that matches the background and start painting the frame to give it a new look.