Protecting Redwood siding
I have moved into a house with unpainted vertical channel-rustic redwood siding. Unfortunately, some of the siding extends down to within a few inches of the ground. In spite of there being a 2-foot gravel perimeter around the house, and in spite of there being a 2-1/2 foot eave overhang, rain splashes against the lower portion of the siding, and after 35 years it is showing signs of decay.
I am unprepared to replace the siding and so was wondering what my options might be? Recently the shingle roof was replaced with a standing seam roof. As a result the one to three feet of snow that used to stay on the roof now slides off, and over the course of the winter builds up enough to lay against the house siding. Because of the sliding snow I am reluctant to install a gutter, fearing that it would be torn off.
I’ve thought of attaching a 1-1/2′ horizontal strip of 20 mil black PVC pool liner or 50 mil EPDM rubber roofing sheet to the lower portion of the siding, to protect if from getting wet further, and hopefully stopping any further decay.
My question is whether loosely covering the redwood siding with a vapor-proof barrier would somehow further promote rot, in spite of this covering protecting the siding from getting wet directly? I could either attach the plastic strip directly to the siding, or I could attach the plastic strip to a 3/4″ thick batten, which in turn would hold the plastic away from the siding.
Any advice, warnings, suggestions?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part