This discoloration is most likely caused by a combination of excessive tannins leeching from the wood and mildew growth.
Painting wood shake siding.
You ll have to remove the mildew and prime the wood with a stain blocking primer.
Step 5 spray on the first of two coats of an acrylic latex paint using an airless sprayer.
Remove as much of the old paint as possible as.
Pull out loose nails and renail using stainless steel siding nails.
Use an old screwdriver or similar tool to scrape out any failed caulk from joints and cracks.
Whether it is composed of wood or asphalt your shingle siding is ill suited for adhesion.
Allow the primer two hours to dry or as directed on the product s label.
Painting cedar however calls for some preparation.
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.
Use an acrylic latex paint.
If you would like to paint shingle siding consider some critical points.
Scrape any peeling paint chips off the shakes with a scraper.
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.
Fill any dents and holes with either a wood or epoxy filler.
You must be careful.
Before you paint condition the siding with a specific type of bonding primer or the final coating will ultimately flake and peel.
Apply an acrylic latex primer to the shingled siding using an airless sprayer.
Paint tends to peel or flake near joints between dissimilar materials think siding and trim window frames and glass etc.
How to prepare old cedar shakes for repainting step 1.