How to Repaint Outside Window Trim

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Repaint your window trim to make them as good as new.
Repaint your window trim to make them as good as new. (Image: Comstock/Comstock/Getty Images)

Wooden window trim is one of the first things on a house or home that deteriorates. It is constantly exposed to the elements from blazing sun to pouring rain, freezing temperatures and sleet, hail and snow. It literally takes a beating every day of the year and eventually the window trim will need to be repainted. Use these steps to make your window trim look as good as new.

Things You'll Need

  • Scraper(2inch)
  • Spackle
  • Sanding Block
  • 220 grit sandpaper
  • Exterior Primer
  • Exterior Paint
  • Caulk,Caulk gun
  • 2 Brushes
  • Razor blade
  • Utility knife
  • Safety glasses
  • Damp cloths
  • Old rag

Scrape away all of the loose paint with the scraper. Remove the loose caulk as well. Depending on how good of a painter you are you may want to use painters tape around the glass or you can use a razor blade to remove dried paint off the glass when finished. Fill any holes or creases with the spackle, wiping off the excess. Allow to dry. Move on to the next window repeating these steps if applicable.

Once the spackle has dried, take the sanding block and sand the area smooth. Use 220 grit sandpaper for this. Make sure to go around the whole window. Wipe with a cloth to get the dust and dirt off.

Insert a caulk tube into the caulk gun and squeeze trigger twice. Cut the tip off the tube and check to see if there is a seal that needs to be broken. If there is, insert a screwdriver to puncture the foil seal. Run a bead of caulk into the space where the old caulk was removed. Dampen your finger and smooth over with a gentle pressure. Wipe excess off your finger with an old rag.. You may have to wipe the bead a few to smooth. This has to dry completely before you paint. Keep moving to other windows while previous ones are drying.

Prime the window trim. Priming is a way to waterproof your trim. Use an exterior grade primer and put on at least one coat. Two coats are better. Allow it to completely dry before putting on the finish coat.

Apply a finish coat of paint and let it dry. Apply a second coat when the first coat is dry. If you used painters tape you will want to remove that. Take the utility knife and score it along the paint edge first so it does not remove your paint.Then gently pull off. If there is any excess left on the glass you can scrape it off with your razor. Wash windows with glass cleaner.

Tips & Warnings

  • A warm sunny day is best Keep a few damp cloths with you to remove drips. When you are not using the brushes keep them wrapped in a damp towel so they do not dry out and get hard
  • Use safety goggles when scraping paint and caulk

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