How to Repair Interior Window Trim around Window Frames

While interior window trim might not be as susceptible to damage as exterior trim, it is still important to keep it in good condition. Interior trim can prevent air from escaping through gaps in the window frame and will make your home much more energy efficient.

Over time the condition of interior window trim can start to deteriorate, which means you need to find out how to repair and replace it. Repairing window trim can make your home much warmer and means that you don't have to spend as much money on heating bills.

With the right tools and materials available you should be able to repair interior window trim easily and quickly. Preparation will ensure that the project is as easy as possible.

Step 1—Removing the Old Trim

The old interior trim needs to be removed from the inside of the window frames. This is normally nailed or glued in place depending on the materials used. The interior trim will be filled using caulking. First use a knife to scrape out and cut away the caulk between the frame and the trim. Use a small pry bar or a screwdriver to lift the window trim off the window. Start at the edge and pry the window trim up to pull it away.

Try to keep the window trim in one piece so that you can use it as a template to cut the new pieces of window trim. If there are any nails left in the window frame, you will need to use pliers or a hammer.

Step 2—Measuring Up

Now you will need to measure the size of the interior window trim required so that you can cut it accurately. Use a tape measure to measure the inside dimensions of the window frame. If you managed to keep the window trim intact, you will be able to skip this step.

Step 3—Preparing the Window Trim

Use a pencil to mark the length of window trim required for the project. Remember that you will need four pieces of trim per window. If you saved the old pieces of window trim, you will be able to lie these on top of the new lengths of trim and mark them with a pencil. This is an accurate way of measuring the size of the trim required.

Step 4—Cutting the Window Trim

The window trim can be cut very easily by using a regular saw, if there are any rough edges you can use a file or cir-form to remove them.

Step 5—Fixing the New Window Trim

The new pieces of window trim then need to be fixed to the window frame. Use nails or glue to hold these in place so that the window trim is fully secured.

Step 6—Finishing Touches

There will probably be gaps between the window trim and the window frame. If this is the case, you need to use caulking to fill the gap. This needs to be smoothed down to improve the look of the window.

Interior window trim not only makes your window look more attractive but it will also improve the energy efficiency of your home.