These are 20 year old wood shingles that have almost 100% UV and moisture protection by virtue of them being covered. They were stained(not by us) when the house was built. The bottom portion of the shingles do receive a little bit of late afternoon direct sunshine.
We washed the shingles with cold water and 800lbs pressure. We used a Crystal Clear stain by Defy towards the top, and even in and around corner nooks. We then blended in some Cedar/Light Walnut pigment as we got closer to the flooring and the more exposed shingles..
The goal being to bring the top and the bottom together to form a new and neutral tone. We triple coated these shingles. Surely they are good to go for a long, long time.