Base of wall flashing
I’m trying to develop/draw the detail at the top of my foundation wall.
I see a lot of details (including in the details section here at gba, at jlc, etc) that show running wall sheathing to overlap the basement wall. I’ve also found articles specifically recommending this as a good way to air seal the junction. Why would I be allowed to let my sheathing touch the concrete – isn’t that going to quickly be a problem?
In my case I am using zip-r and a horizontal lap type siding (over a rainscreen). My current plan is to have the insulation of the zip-r be primarily over the concrete with the back face of osb about 1/2″ proud of the concrete (so front face ~1″ proud). It seems to me I should protect that bottom face of the osb.
I’ve seen some details for using a tape from the concrete to the osb. Is a tape solution going to be durable long term? It would not be an easy fix if that tape gets beat up (errant weed wacker) or starts to come off over time. I’ve also seen details for liquid flashing it – again I wonder if that is durable long term? There wouldn’t be anything protecting this flashing against the concrete detail so it must get beat up.
I assume this is a common detail done every day but I’m not finding anything that looks durable and makes sense to me.
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