Protecting ICFs between grade and siding; parging etc
I should have sorted this out a long time ago, like before backfilling my foundations I guess, but never mind.
I have ICF foundation walls up to the subfloor level. I have a cedar band with the bottom roughly at subfloor level and then hardipanel above that. The ICFs are protected below grade with dimple-sheet and blueskin to cover the top of the sheet. Actually, due to some ‘misunderstandings’ the blueskin and occasionally even the dimple sheet go above grade. At the front of the house (the walkout basement part) the blueskin goes right up under the hardipanel.
I’m having trouble deciding what to do to protect the ICFs between grade and cedar band, and assorted googling hasn’t really found anything too exciting so far. Parging cement seems to be the default but I’m not sure I see it sticking to the blueskin too well, so maybe there is a problem there. I’ve seen strips of concrete board suggested, which might work I guess but surely I’d still have to use parging etc to seal the gaps; at least it should stick to concrete board! Someone posted a suggestion to use roll stock Al or even copper($$$) but that seems like it would be prone to dents and creases. Perhaps it could be cut and bent on a brake to make a built in drip-edge.
Something that concerns me about any of the sheet/board suggestions is the possibility of ants/termites/alien slugs with laser gun eyes crawling up behind it and not being detectable until too late.
Suggestions would be welcomed; low cost ones especially. You know how it is I’m sure – at the end of the building process you tend not to have a lot of money left over…
There’s a bunch of pictures that might illustrate my issue at www.rowledge.org/tim/building both in the progress slideshow and the blog pages.