A water leak, rotting, or other condition can damage the molding that surrounds windows, walls, and doors. Replacing a baseboard is usually easy because the area is not very ornate. It can sometimes be difficult to replace window or door molding because this can be hard to match. If you cannot find matching molding, follow the steps below to create a casting and mold.
You will need:
• Polyester resin
• Wall adhesive
• Painter’s tape
• Putty knife
• 2 wooden blocks
• 2 pieces scrap wood
• Utility knife
• Home lubricant
• Paint (color should match existing molding)
Step 1: Put the painter’s tape around the floor and wall areas adjacent to the damaged molding.
Step 2: Auto body filler is another name for polyester resin. It features two parts: a catalyst contained in a tube and the resin. Mix the two components on one piece of the scrap wood, using your putty knife and following the product instructions. This resin is used to create the casting of your original molding.
Step 3: Spray the existing molding in your work area with the home lubricant. This will allow your resin to release from the molding. Use your putty knife to spread the resin onto this intact molding section. The mold should be as large or larger than the area featuring the missing molding. Allow a few minutes so the resin can harden to a semi-rubbery state. Trim resin with your utility knife so it matches the dimensions of the molding.
Step 4: Gently remove the resin from the molding. Create a casting mold by placing the resin on the remaining scrap wood piece. Put one of the wooden blocks at each end and tape the blocks to the wood to anchor the mold in place. Use the home lubricant to spray this mold.
Step 5: Create another batch of the polyester resin. Pour this into your new mold. Allow it to dry until slightly flexible. Remove the resin from your mold and trim the excess with your utility knife.
Step 6: Fill in air bubbles with the spackle. Let the spackle dry, then sand this casting. Apply the casting over the area of missing molding, securing with the wall adhesive.
Step 7: Paint this area to blend with the existing molding. Allow time for paint to dry.