Tyvek … Typar … Premium wrap … tapes … flashing … HELP!
OK … so you guys have guided me along so far.
3500 sq ft shop … 3 x 6 construction … CDX plywood sheeting … house wrap … 3/4″ strapping for a drain plane … LP smart side board and batten (16″ x 16′ pieces).
I am just doing the final take off to get the material order in.
I thought house wrap would be the easiest part … hmmmmm.
I have watched countless videos … read a bunch of posts … called the local suppliers ….
On my last house I used a woven product. Now I am told this is junk.
I was going to go with the old standard Tyvek … then one person says use Typar to hold out the water better … but another says it will rot, use Tyvek so it can beath.
I give, what house wrap should I use ?????
Also, with 16 ft walls, I need at least two piece. The video I just watched showed them taping the seam between the two. Is that correct or do I leave them open so water can drain if it get in ?
Same for the bottom … open or taped (I see windows are to be left open under them) ????
Finally, tape … what brand … Tyvek .. Typar …. ?????
Opps … last one … flashing (wide tape for around windows, sill area, ….). My last builder just used left over “Grace water and ice” from the roof … I think he may have even used some shingles when that ran out.
I see there is a Typar “Flashing Flex Roll” … seems you don’t have to cut it at the bottom of the window sill.
Is this best or ?????
As always, any advice will be greatly appreciated!
Mike
Replies
Just to throw a monkey wrench into the problem ... I just got an e-mail from a friend saying to use good old tar paper rather than Tyvek ....
Even more confused ...
Thanks .... Mike
Tyvek has a higher perm rating than Typar (56 vs 7) and has a drainage plane. House stays drier and if wet, dries faster.
https://barricadebp.com/news/comparing-home-construction-house-wraps-typar-vs-tyvek
Use Grace Vycor as your flashing tape.
https://gcpat.com/en/solutions/products/vycor-weather-barrier-flashing-tapes/vycor-plus
Frankie
Most of these are usable. Some are more fragile than others - asphalted building paper/felt was replaced with tyvek/typar, and then a wide range of other products have come on since then. Some are more moisture-sensitive or less UV-stable than others.
https://www.youtube.com/watch?v=24ugqWbHRT8
What seems to be universally recommended these days is a vented rainscreen ("drain plane") overtop the WRB - in every situation, in every climate it makes the WRB and the sheathing and the siding dry orders of magnitude faster, with no downsides but a slight increase in installation complexity. Quite possibly this renders all of the options acceptable.
Awesome ....
I have definitely decided to leave a 3/4" drain plane ... something I have never done before.
Since the LP siding is ... well at least in my mind ... just fancy osb, I think this should help keep everything dry.
With some luck, the house wrap will never see any moisture since it will need to get by the siding then jump a 3/4" gap but just in case, I am trying to use what ever is "best" ... though I am finding "best" can mean a lot of things.
Thanks ... Mike