Swipe windowsill inside and out


Each sill can and others must be deleted. While wooden sills do not last long outdoors without protective coating, interior window or stone sills are painted for visual reasons. The right products are available for every stroke.

Wood and natural stone

Window sills made of wood should be painted both inside and outside. If the texture is to be worked out on solid wood or real wood veneer, transparent lacquers are the right choice. Inside, the surfaces can be painted with wood oil or wax. For a colored coating, a very thorough pre-treatment is necessary because different suction intensity of the surface lead to stains and uneven ink coverage.

Natural stone can be painted with special paints and must be primed beforehand. Normally, acrylic paints are the right choice, especially in the outdoor area bring the necessary weather resistance. A multiple coat is necessary and the preparatory cleaning must be done very thoroughly. Granite should be sealed on the outside.

Aluminum and other sheets

When painting a windowsill made of aluminum or other metal sheets, the compatibility with the surface must be taken into account when choosing the color. Many ingredients in paints, such as acrylic, chemically react with the metal, which can cause brittleness and, in the worst case, cracking and rusting. For older dented or with rusty cracks aluminum window sills is usually worth installing a new windowsill.

Paint wooden sill

  • acrylic paint
  • primer
  • Brush or plastic roller
  • Abstreichgitter
  • paint bucket
  • Abrasive paper 300 or 400 grit

1. Clean and sand

Grind the wood surface first with 300 grit, so that no paint residues or impurities remain and with the 400 grit after.

2. Priming

Prime the dust-free surface according to the manufacturer's instructions and allow the windowsill to dry out for at least 24 hours.

3. Swipe

Apply the first coat and let it dry according to the manufacturer's instructions. The coverage and durability improved by several thin compared to a few thick layers of paint.

4. Last painting

Apply the final coat with a plastic roller for optimal smoothness without grooves or streaks.

Tips & Tricks

For deep-seated moss, fungal infestation, cracks or rotting, it may be most useful to remove debris and wood chips. Then treat the remaining wood with chemical mushroom and moss stoppers and re-decorate the windowsill.


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