u/OldWilsonHouseDIY

Image 1 — How to Prep and Paint wood in bathroom?
Image 2 — How to Prep and Paint wood in bathroom?
Image 3 — How to Prep and Paint wood in bathroom?
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How to Prep and Paint wood in bathroom?

Redoing the walls in bathroom. Pulled down old paneling (and many layers of old wallpaper) to find this wood wall instead of drywall?

The wood feels unsealed, it’s rough and splinters, so how would I seal it to later paint over?

I’ve spent the last few days doing nothing but reading everything online to do with wood walls/ceilings/floors in bathrooms and the best answer seems to be don’t do it in the first place but unfortunately we’re past that.

The process I’ve figured out is:

First, clean and sand with 120 grit then a second pass with 220 grit

Second, apply a moisture barrier like the “Mapei Mapelastic Aquadefense Liquid Indoor or Outdoor Waterproof Membrane”. From my reading this specific product also acts as a primer so no additional primer is needed?

Third seal any gaps or cracks with a silicone bathroom caulking.

Finally paint with paint mixed specifically for high-moisture areas.

Is this an acceptable process? Am I missing any steps or have them in the wrong order?

Located in central north Texas.

u/OldWilsonHouseDIY — 17 hours ago