This discoloration is most likely caused by a combination of excessive tannins leeching from the wood and mildew growth.
Painting wood shake siding.
Powerwash the siding to remove any excess dirt or paint with a low pressure pressure washer.
Painting and stripping old wood siding overview strip the old paint go to our paint stripping page we decided to strip the paint to give us the best chance of.
Some sections of old unpainted shingles and siding may look darker than others.
You ll have to remove the mildew and prime the wood with a stain blocking primer.
You must be careful.
Step 5 spray on the first of two coats of an acrylic latex paint using an airless sprayer.
Painting cedar however calls for some preparation.
This is where water seeps into cracks and soaks into the wood causing the paint to peel.
You will need to scrape or sand to remove loose and flaking paint to insure a good paint job and don t worry about knocking some of the texture off the siding as it should not be that noticeable.
How to prepare old cedar shakes for repainting step 1.
If you would like to paint shingle siding consider some critical points.
Allow the primer two hours to dry or as directed on the product s label.
Remove as much of the old paint as possible as.
Apply an acrylic latex primer to the shingled siding using an airless sprayer.
Use an acrylic latex paint.
Paint tends to peel or flake near joints between dissimilar materials think siding and trim window frames and glass etc.
Scrape any peeling paint chips off the shakes with a scraper.
Before you paint condition the siding with a specific type of bonding primer or the final coating will ultimately flake and peel.
Fill any dents and holes with either a wood or epoxy filler.