With old buildings such as my 130 year old barn water blasting the loose paint is not a recommended practice.
How to prep wood siding for paint.
Remember that covering all bare spots is vital.
If the wood grain has lifted after wood cleaning or if the wood appears furred use 120 grit sandpaper to smooth the surface.
Adjust the pressure on the power washer to light and gently knock off any dirt or debris that may.
Apply caulk where needed.
Sand the cured filler with a hand sander to make it smooth and level with the surrounding wood.
Fill any dents and holes with either a wood or epoxy filler.
Paint tends to peel or flake near joints between dissimilar materials think siding and trim window frames and glass etc.
Using a good quality exterior wood primer will give your siding a solid base over which to apply your exterior paint.
Preparing wood siding for painting cleaning the siding scraping and sanding loose or peeling paint.
Wash it down with a hose.
How to prep weathered wood for painting.
Remove any loose paint or debris.
Apply an epoxy consolidant to soft wood and coat the rest with a wood preservative.
This is where water seeps into cracks and soaks into the wood causing the paint to peel.
If the majority of your siding is bare or at least close to half then you will want to apply primer to the entire area.
For larger surfaces like wood siding or a deck you can scrape the old paint or stain off using a wire brush or even a pressure washer.
Make sure you apply primer to all spots of bare wood.
Clean the entire surface with soap and water or a pressure washer to remove any dirt and grime that s built up over time.
How to prep and paint wood siding power wash the siding.
We used the paintable wolmans woodlife classic clear wood preservative if the wood was paint free.
Fill holes and make.
Generally applying one coat of primer is sufficient.