So, to pull all this together, how would you devise a perfect system? I’m in the process of building my largest spec home ever (3 million$). It’s 3 coat stucco, metal lath, weep screeds etc. I want it “rightâ€, don't want to be getting sued when I'm Dick's age. I have a three story home, 10,000 sq ft, 2x6 walls, 11’ first floor, 10’ second floor, 9’ third floor (we have a 35’ max height restriction).
Here’s how I’m building it, tell me what I’m doing wrong:
1). Used the best grade of material in my market: DF #2 for studs, #2 SYP for rafters (2x8), ½†CDX for exterior solid sheathing, 5'8" CDX for decking. Nailing pattern on sheathing is 4†OC @ the edges, 6†in the field.
2). We use Simpson 2.5 clips on all rafter to plate connects, 36†straps on the exterior of plywood sheathing between floors, and 12†straps on the top of rafters-rafters over the ridge.
3). I used all copper flashings, including copper eve strip. Flashings installed correctly.
4). I used Tyvek Stucco Wrap as layer #1, wrapped into window openings.
5). I used Tyvek Home Wrap over the Stucco Wrap, again, wrapped into the window openings.
6.). Stucco contractor will add one layer of grade paper on top of my (2) layers of Tyvek.
7). All exterior doors have lead coated door pans.
8). Roof sheathing has Grace Ice & Water Shield applied solid, with 30# felt over it. Roof will be slate.
At all window openings I am doing the following:
1.) Wrapped Tyvek into opening.
2.) Applied Tyvek 7†wrap (creases in corners) at the bottom window seal, turned up 6†on side.
3.) Put window pan on top of Tyvek.
4.) Added what we call window wrap on the sides of the opening, lapping over the turned up flange of the window pan.
5.) Installed the windows (have nailing fins), leaving a 1/8†gap at bottom for water to shed.
6.) Flashed the top of the window with membrane wrap.
7.) Added another 6†layer of window wrap (giving me 2) over the side flanges of the window.
My only issue is flashing the top of the window. The flashing really needs to be behind both layers of Tyvek, but I don’t want to cut the Tyvek. Right now I am leaning towards using a 9†membrane “flashing†just “attached†over the 2 layers of Tyvek. Any suggestions? I don’t want to use metal head flashing, because my windows are clad aluminum, I think the membrane will be OK. Also, in looking at it seems the nailing fin gives some water protection, although not sure it’s designed for that, I’m asking the manufacturer.
OK, shoot it down guys.
Here’s how I’m building it, tell me what I’m doing wrong:
1). Used the best grade of material in my market: DF #2 for studs, #2 SYP for rafters (2x8), ½†CDX for exterior solid sheathing, 5'8" CDX for decking. Nailing pattern on sheathing is 4†OC @ the edges, 6†in the field.
2). We use Simpson 2.5 clips on all rafter to plate connects, 36†straps on the exterior of plywood sheathing between floors, and 12†straps on the top of rafters-rafters over the ridge.
3). I used all copper flashings, including copper eve strip. Flashings installed correctly.
4). I used Tyvek Stucco Wrap as layer #1, wrapped into window openings.
5). I used Tyvek Home Wrap over the Stucco Wrap, again, wrapped into the window openings.
6.). Stucco contractor will add one layer of grade paper on top of my (2) layers of Tyvek.
7). All exterior doors have lead coated door pans.
8). Roof sheathing has Grace Ice & Water Shield applied solid, with 30# felt over it. Roof will be slate.
At all window openings I am doing the following:
1.) Wrapped Tyvek into opening.
2.) Applied Tyvek 7†wrap (creases in corners) at the bottom window seal, turned up 6†on side.
3.) Put window pan on top of Tyvek.
4.) Added what we call window wrap on the sides of the opening, lapping over the turned up flange of the window pan.
5.) Installed the windows (have nailing fins), leaving a 1/8†gap at bottom for water to shed.
6.) Flashed the top of the window with membrane wrap.
7.) Added another 6†layer of window wrap (giving me 2) over the side flanges of the window.
My only issue is flashing the top of the window. The flashing really needs to be behind both layers of Tyvek, but I don’t want to cut the Tyvek. Right now I am leaning towards using a 9†membrane “flashing†just “attached†over the 2 layers of Tyvek. Any suggestions? I don’t want to use metal head flashing, because my windows are clad aluminum, I think the membrane will be OK. Also, in looking at it seems the nailing fin gives some water protection, although not sure it’s designed for that, I’m asking the manufacturer.
OK, shoot it down guys.
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