How to Fill Holes & Cracks in Exterior Siding

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Small holes and cracks are not a serious problem for the exterior siding on your home. However, you will need to make the repairs as soon as they are noticed in order to prevent further damage to the siding and your home's exterior. Loose or worn paint is often the cause of small holes and cracks in wood siding. Maintaining the paint on the exterior siding of your home will help prevent these types of repairs. Once you have made all of the repairs to your exterior siding, it is a good idea to maintain the paint to protect your home.

Things You'll Need

  • Paint scraper
  • Wire brush
  • Putty knife
  • High-performance wood filler, with hardener
  • Sandpaper, medium and fine-grit
  • Primer
  • Paintbrushes
  • Paint
  • Scrape the areas of the exterior siding that have small holes and cracks with a paint scraper to remove any loose paint.

  • Brush the surfaces in need of repair with a wire brush , while making sure to brush in the same direction as the wood grain. This will remove an loose debris on the wood siding.

  • Sand the areas in need of repair with medium-grit sandpaper. Always sand with the grain.

  • Mix a small amount of hardener in with the high-performance wood filler using a putty knife. Prepare only enough to make the repairs, since the mixed filler will harden completely within 15 minutes.

  • Fill the small holes and cracks in the exterior siding using the prepared wood filler and a putty knife. Allow the filler to harden for 15 to 20 minutes.

  • Sand with a progression of medium- to fine-grit sandpaper until the filler is flush with the surface of the exterior siding.

  • Prime the repaired areas of the siding with a paintbrush and exterior grade primer. Allow the primer to dry for at least four hours and apply a top coat of exterior grade paint.

Tips & Warnings

  • Inspect your exterior siding in the spring and fall of the year to maintain your paint and make repairs as needed.
  • Wear eye protection when repairing exterior siding.

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References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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