1/2" x6 cedar lap siding is set on sill for slope, prior to pan-flashing installation.
"Can you explain more about this?
Thanks,
Tim" --TimIL, 09/07/05
"Tim,
Obviously, the slope in the picture is exagerated, since the siding is not laying flat yet. The intent of the board siding, is to give the pan flashing a 1/4 inch slope to the exterior. The siding measures 5 1/2 inches wide, 1/8 thick at the thinnest part, (outside) and 3/8 thick at the thickest part, which is the inside. hence the 1/4" slope to the exterior. What this does, is in effect puts gravity on your side, in case of a breach in the flashings somewhere. Water will accumulate on top of the pan flashing, and run out, via the spaced tape gaps at the bottom. Even if the space tape at the bottom lets in some wind driven rain, which is posible, it will not be enough water, nor have enough force to back up passed the pan flashing with the sloped sill. Without the sloped sill, and spaced tape at the bottom, if a breach in the flashing, or window flange occurs, it will sit there, until it evaporates, finds a pathway into the stud cavity or drains to the inside." --Rollie, 09/07/05
"Does this mean the window sits on the high edge of the bevel and is plumbed from this??
Would this extra 1/2"need to be considered for the rough opening?
Thanks
Al" --AL, 10/05/05
"Al, There is potential for an opening height issue. I did not make any allowances with the Anderson opening, and they all fit fine, even with the additional sloped sill." --Rollie, 10/07/05
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