Mold is a fungi that grows in damp or humid areas. It can grows on just about anything, including your window sill. A window sill can be particularly vulnerable because of condensation on the window. Water can also leak in through the window frame. With a few guidelines and materials, you can kill mold on a window sill.
Things You'll Need
- Chlorine bleach
- Laundry detergent
- Mold killing product
- Wood cleaning product
- Wood finish
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Clean off the window sill. Remove any dirt, cracked paint or other debris. Scrape off any visible mold with a spatula. Use a non-metallic spatula to avoid scratching the wood.
Create a solution to kill the mold. Mix 1/2 cup bleach and 1/2 cup laundry detergent with one gallon water.
Test the solution on a small portion of the window sill to see if it has any adverse effects. If the wood changes color, use a solution of water and detergent only.
Scrub the solution into the mold with a sponge. Keep scrubbing until the mold is gone.
Allow the window sill to dry completely. Open the window if it is a dry, non-humid day. Scrub and let the window sill dry again if mold persists.
Stubborn Mold Treatment
Apply a commercial mold-killing product available at most hardware or home improvement stores. Scrub the window sill with a wood-cleaning product.
Sand the window sill to get at the mold's roots.
Apply a wood finisher or repaint the window sill after sanding. Make sure all the mold is gone before painting. Mold will grow under paint.