![]() Again, follow the window makers procedure. However the sides and top are flashed again to keep water from going from the outside to and under the window fins. The bottom fin is often not flashed to allow water to exit. Then the finned frame window is installed with shims and screws or nails according to mfg directions. Another thing that can be done is to flash as small 'water strip' strip onto the sill plate, maybe 1/4 to 3/8" high. Alternatively a thin wedge piece can be installed on the sill plate. It helps a lot too if that bottom sill that is flashed over is installed with a slight down and out tilt to give the water a hint of the direction you want it to go. Then the sides are flashed and lastly the header. The bottom flashing is to prevent water from getting in between the T1-11 and the framing when water finds it way in there. The flashing (Grace Vycor or similar type) is installed bottom, sides then top. What John has shown is how to flash the building wrap or paper around the window opening. In the end we're in an area that receives just 15 inches of rain a year and gets very dry for at least 2-3 months of the year so I'm hoping that even with T1-11 it's unlikely much water will get in anywhere.īut I do know that where I live is even drier and our 54 year old house has very little water damage - our problem is more often then not the sun. I like board and bat but finding even rough sawn lumber for it seems a challenge - you'd think in logging country I might (note, I did hear of a mill about 20 miles north that might sell rough sawn stuff). The problem I'm having is that I can't seem to find a cost effective alternative. T1-11 isn't the best choice of siding, but it is pretty cost effective. You have to do your best at those places, but you minimize the potential of a leak. There are two sticky areas at either side of the window / door heads and if there are roof to wall connections that are pretty much impossible to do the "lead the water out" thing with T1-11 products. That lapping is important, think like rain, lead the water out / on top of the paper / felt. Pretty much, the heads and the flashing, pay attention to that detailing on the links you look at, aways lead the water to day light/ on top of the building paper or felt. Wrap the building, prep the window openings, install the window and flashing, install the T1-11 but leave 1/2 less then the trim, rabbit the trim and install over the T1-11? I'll look and see if I do have a 1/2 done window with T1-11 type siding. I'm pretty sure I've lost you by now, and I don't have any good photos showing what I mean. The head pieces are a bit more work as you need to cut the T1-11 exact, and you need to mount the head flashings before the T1-11 goes on. That the line to cover over with the T1-11 by say 1/2 ", you then hang all the T1-11 on that wall, or the whole house, then come back and trim out the window, you rabbit the outer edge of the trim to lay over the T1-11, so you have a good or better seal against the rain. OK sheath the walls, paper the walls, use John's link for you sill pan ( I build ours differently but that link is the same idea, after that take a piece of you trim and make a line around the window in pencil. The best way to do T1-11 IF you have a window wrap is to cut you window wrap or trim or use a scrap piece of the trim to mark the outer edge of the trim.īoy I can see this is going to be hard to write down, It seems to me it would be best to install the window on the OSB and then side the building with whatever becuase the flashing would be more effective right? Option B: OSB, Felt Paper, Window, Trim, T1-11 So option A: OSB, Felt Paper, T1-11, Window, Trim So I want to know if I install the window on the OSB normally and then trim and run the OSB up to the trim ala modern siding techniques, or if I install the T1-11, then the window and trim around that (they way you would with one layer of T1-11)? Either I did it over T1-11 on the outside as both siding and structural (one layer) or on OSB and then trimmed and sided with modern siding. So the question is this: We've used OSB as structural sheeting and will be installing T1-11 over it as siding but I've never installed windows over this kind of wall before. Once completed we will mask off the windows and door etc and stain the living crap out of it This is common in our area perhaps becuase it's pretty dry? Who knows. OK we've settled on the T1-11 unfinished siding to be finished with batting to make it look like board and bat siding - cost was lowest and I had to remind myself of that several times.
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