Tyvek + Drip Cap Question – Is this OK?
I’m back with another check-in as I just had some window trim installed in preparation for some board and batten-style metal siding.
I’ve read varying things regarding the order of operations > place window trim, then tyvek overtop, then drip cap over tyvek OR all trim detail under Tyvek, then tyvek layers over top, sometimes taped other times not.
Over our door, he has both trim + drip cap under the Tyvek, not taped. On the windows, the trim appears to be fully over the Tyvek, which is possibly why they layered a new piece of Tyvek above the windows (?). Which is correct and if it should be under the Tyvek, is the new layer doing what it should? (See attached images).
Secondly, we applied Liquid Flash to the OSB and over the sill plate to concrete so to prevent bugs and water damage. You can see the before and a bit of after in the images attached of the placement. (in first comment)
When I was watching yesterday they created and attached an L shaped aluminum trim piece to OSB which goes down and covers the sill plate and ends at concrete. When asked about it they said it was to help prevent bugs – which is why we had the flashing.
I may be overthinking things…but will condensation/water which may form on OSB and run down behind the starter strip and this L-shaped piece and cause an issue? I assume they do this often since I didn’t ask for it, but curious if it’s cause for concern? Based on the fact the OSB is out the 5/8″ (?) and I can’t see the flashing on the concrete, I think there’s an air pocket/gap at the 90 degree before it meets the concrete. Thoughts?
Thanks so much!
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Sill plate before and after and an underside view of the L and starter strip.
The drip flashing looks fine. The important thing is that the housewrap overlaps it, regardless of whether it's the main housewrap or a second piece they applied over top.
I haven't seen that base metal detail before. My guess is that since there isn't much clearance from the ground, they put the L metal there to protect the overhanging sill plate and the bottom edge of the sheathing from the splashback of rainwater hitting the adjacent ground or patio surface. As long as the vertical leg is behind the housewrap, I don't see any problem.
It is more typical to see it installed with the horizontal leg sticking outwards so that it closes off the hollow spaces behind the metal siding and prevents bugs from getting in there. Maybe they will do that as well.
Thanks for your thoughts on both questions.
I'm not sure they will be doing any other detailing along the bottom but it seems pretty tight and we won't have bugs getting in the sill plate with our liquid flash.
As long as there is no issue with possible water infiltration, I'm good.