Problem with flashing details at inside and outside corners (3 inch foam)
kenorakq
| Posted in General Questions on
I’ve stripped my exterior walls to the plywood and am about to install the metal flashing at the bottom of the wall… with 3 inches of foam and 3/4 inch furring strips and a Hardieboard type horizontal lap siding to be added the projection of the flashing is enormous.. at 4″1/4 inches plus a 1″ drip edge lip.
Problem is at inside and outside corners: I can’t figure out how to miter these complex curves into a continuous flashing. Is there a video here or on youtube that gives some insight?
I’ll post a picture shortly to illustrate… thanks
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Replies
Tim,
I'll try and walk you through a simple method with these sketches.
Starting with the outside corner.
- Cut the flashing as shown in the top-right sketch and bend down the end slightly along the 45 degree dotted line.
-Cut the opposing piece of flashing at 45 degrees from the corner as shown in the bottom right sketch. Install in a bed of caulking on the first piece you cut.
Inside Corner
- Cut the flashing as shown on the top left sketch, and bend up slightly along the 45 degree dotted line.
- Cut the opposing piece of flashing at 45 degrees from the corner as shown in the bottom left sketch. Install on a bed of caulking on the first piece you cut.
Because of the length of the overlaps you may want to secure them together with a short metal screw.
Tim,
Another approach is to use U-shaped perforated flashing to cover the whole thing.
Thanks for the insight..I'll give it a shot..