I have an old house with a stone foundation and ~6×6 sill plate. The deck used to butt right up to the siding. I cut the deck away about 18" in order to get access to the area for some weatherization… removed some courses of clapboards, sheathing boards (T&G), and did some spray foaming. My question now is, should I take any measures to protect the foundation, sill, and siding from moisture – particularly snow that will fall from above and/or drift?
I was thinking several inches high metal flashing extending to an inch or two below the sill to a few inches above it. But then how would I attach the clapboards? Is there a better alternative? Or will I just have to live with replacing those clapboards sooner than the rest of them?
Here's a schematic (side view) to illustrate:
The vertical line represents proposed flashing.
Best Answer
better than metal flashing and its excellent ability to repel water/moisture is self-sticking rubberized flashing. Although 15 pound roof felt also is acceptable. Either product should be lapped over by the (if any) house wrap and fastened with minimal nails ,etc. I'm not sure about the problem you have in regards to re-installing the clapboards? Won't they re-install with the original fasteners? or is there concern about nailing through the metal flashing?