replacing casing on original double hung
All the peeling exterior window casing and most sill tails are being replaced before we paint a 1920’s cedar shingled house with original windows on the first floor and replacement double-glazed sashes on tracks on the second floor.
Weight bays get Great Stuff then fiberglass, with the double-hungs getting Pullman sash springs in place of the pulleys (and weights). The original windows are either in good shape or had been restored, with slots in the sashes to fit sheet metal weatherstripping that bends into the slots. The restored windows glide smooth with no rattle. The sashes have interlocking metal weatherstripping that snug up when locked.
One wall is being reshingled, so we’re using Typar over Vycor wrapped into penetrations, caulk each course of shingles at the casing edge stopping where the exposure begins.
How should I seal/flash around the casing on the other walls where the existing shingles will remain? In particular, I’m concerned where the siding meets the vertical casing. The drip cap could direct water to flow down the seam. I don’t want to rely on caulk to keep the water out.
I was thinking when the casing is off, insert Z-flashing sideways under the shingles on the sides, then Vycor from the flashing to the sheathing and into the weight bays.
Edited 9/16/2009 11:36 am ET by MadisonRenovations