Flashing between ends of clapboards and brick chimney at end of house?
I live in a timber frame house built in 1991. External walls are SIPs. There is a brick chimney located at a gable end of the house. The ends of the clapboards on either side of the chimney butt up against a piece of vertical 1″x1″ which lays directly against the chimney bricks. It seems as though this arrangement really isn’t sufficient to keep water out of this location. There has been some water leakage into the porch which was added to this end of the house and encloses the 1st floor portion of the chimney. See attached photo.
Some searching of the Internet has only netted 2 approaches: 1) Install flashing vertically in the corner, 2) Install flashing into the chimney morter every few courses (see attached image for the concept),
I plan to remove the existing clapboard on that end of the house because I’m replacing two damaged windows. The current situation is that the clapboards are nailed directly to the SIPs’ OSB skins — there is no paper or building wrap! Yipes! Current specs for WinterPanel SIPs requires 1″ (3/4″) furring be added to the OSB for proper nail grip for the siding. Current specs also require an air gap. I plan to turn this wall into a rain screen, using clapboards again to match the rest of the house.
I’ve seen fairly good coverage of rain screen techniques on this site and JLC, but what is best way (or several very good ways) to deal with this pesky location where the chimney meets the end of the house?
Bill in Upton MA USA
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