Installing New Doors and Windows into Existing T1-11 Siding
T111 siding is the bane of my existence and runs rampant around where I live.
I typically am a stickler for window and door installation and waterproofing/airtightness details.
I prefer to install/flash to an actual sheathing/WRB layer-then siding/trim overtop.
I have a couple project I am looking at with T111 and don’t really feel 100% flashing/installing directly to the T111 and nailing trim overtop. I feel like the channels in the T111 are just asking to funnel water right down into the wall and past and tape/caulk present.
I have also seen people install housewrap over the studs, then install windows directly to WRB/Studs, then install t111 overtop and cut around the windows. In order to unearth the windows and reinstall you must take off the t111.
I don’t really prefer either method but curious how ya’ll handle new doors and windows with T111 siding existing.
I also am wondering if anyone has ever taken this approach-say existing T111 is in good shape (very rare). You are going to replace windows and doors and want to improve things a bit. What if you call the existing, stable T111 the sheathing-apply a WRB overtop, then flash all windows and doors to that as if it was a sheeted, wrapped wall assembly and now put new siding overtop of that. Essentially turning the existing T111 into a sheathing layer and putting proper siding overtop of it. Anyone ever do this successfully? My worry would be sandwiching the sheathing (t111) between two layers of WRB (the old one underneath overtop the framing and the new one overtop of the t111 before siding).
I’d still worry if any water got in the wall (I usually use a rain screen assembly) the T111 channels could funnel water down past the flashing tape and into the wall.
Any two cents would be helpful! I have tried to crack this in my mind for awhile now and figured I’d ask here.
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