What sandpaper to use before painting walls

Sanding before painting is an important step to ensure proper paint adhesion and a smooth finish.

However, it is possible to over-sand surfaces prior to painting. Sanding too much can damage the surface, lead to uneven paint application, and create extra work. Understanding proper sanding techniques and knowing when to stop sanding is key to achieving the best results.

How much sanding is needed before painting?

In most cases, light sanding is sufficient preparation before painting.

The goal is to “degloss” or roughen the surface just enough for the paint to adhere properly.

Do you have to sand before painting over paint

Heavy sanding that exposes large amounts of bare wood or other substrate materials is usually not necessary.

Here are some general guidelines for sanding prior to painting:

• Previously painted surfaces: Lightly sand with 220-400 grit sandpaper to scuff the surface.

  This helps paint bond properly.

• New drywall: Wipe with a damp sponge to remove dust and fill joints, then apply primer. No sanding needed.
• New wood: Sand with 120-150 grit sandpaper to smooth and prepare the surface.

  Always sand in the dir

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