I have a 10 year old timber frame home with stained T111 plywood siding w/grooves on 8″ centers. I would like to install cedar shingles over the original siding. The windows and corners are framed in rough sawn cedar 1X4, so the smooth sawed shingles can run up to all opwnings and but against the existing trim (perhaps w/ a 1/8 inch gap to allow moisture to drain and dry).
Do I have to install a layer of tar or felt paper over the T111? Should I stain the shingles before installing them. Most projects I see in my part of Southern Michigan seem to install the shingles, then stain them.