Flashing details on furred out wall
im trying to figure out the best way to flash a window and door opening on a shed I am building. The wrb is Tyvek currently installed over the sheathing. I plan on furring out the wall next with 1×4 creating a rain screen and plane for my window and siding to be installed too. I am pretty inexperienced with flashing and my plan so far is to follow the method in the picture provided. How might I incorporate this detail with a furred out wall? Should I flash and install the window before strapping? Also I should mention I am doing vinyl siding and plan on “picture framing” the window with exterior casing as a trim for the siding to finish into. Thanks for the tips!
Rain screen applications are typically not applied with vinyl siding as the siding is formed in a way that it is raised from wall plane. Also, they have weep holes for water to get out. I would use flashing tape for the windows as shown in your picture. Install j channel properly to divert water and your windows will stay dry, no worries.
Do you have a detail you could post showing that proper J-chanel install? I’ve seen few J’s done well and think a good explanation would help a whole lotta people, including many if not most vinyl installers.
All the main manufacturers should have install videos on YouTube that will show best procedure. In the search use Certain Teed, Georgia Pacific, Kingspan or Owens Corning (major producers of vinyl siding) for help. They may even have their own channels. Basically, you treat the j channel like a flashing itself. The pieces are trimmed/folded in a way to keep water from entering building. If you refer to the manufacturer you almost never go wrong.
Yup, you’d think the slam and dash installers would take a look once in a while ........
In that case I suppose I’ll opt out of the rain screen. Once the window is installed with the flashing tape as mentioned, Is it best practice to install a head flashing first (resting on window) with my trim and J sitting on top? Or could I install all my trims first- butted into the window and resting on top. Then head flashing on top of trim and J all around? Also I should lap my tyvek onto the metal head flashing, not the straight flash right? Sorry if this question is a little confusing.. thanks again
I’m assuming your windows are new with nail fin? Procedure is a little different if not. They do make vinyl trims with built in channel that speed up install and do not require flashing. If you are installing wood, pvc or hardi trim I would install flashing on top and bottom of window before the j channel. May need flashing below the trim on the bottom as well to keep water from getting behind j channel, but depends on how you do your trim. Or you can use trim coil to wrap the wood and create your own flashing w/in that.
All things considered I guess I'll quit the downpour screen. When the window is introduced with the blazing tape as referenced, Is it best practice to introduce a head blazing first (laying on window) with my trim and J sitting on top? Or on the other hand would I be able to introduce every one of my trims first-imposed upon the window and laying on top. At that point head blazing on trim and J all around? Additionally I should lap my tyvek onto the metal head blazing, not the straight glimmer right? Sorry if this inquiry is a touch of confounding.. much obliged once more
Please delete the above links as they have nothing to do with anything worthwhile.
Update: thanks for removing them FHB