I'm ready to start building on my foundation, which has 2" foam on the outside of the block (radiant slab). Fiber cement siding "Hardie Plank" says to leave a 1" gap above areas where water may be present, and the foam will have a z-flashing on top exposed about 1 1/2". I was wondering what you guys with this arrangement have done for a transition between the siding and foam flashing. Thanks!
Foundation foam to fiber cement transition question
- Thread starter ChadB
- Start date
RickP330
Well-known member
Here is a pretty good site concerning installation. There is a "water table" or something you can put down. Azek board or something. he gets into it here.
Rick
http://www.hammerzone.com/archives/exterior/siding/replace1/fiber_cement/install.htm
Rick
http://www.hammerzone.com/archives/exterior/siding/replace1/fiber_cement/install.htm
RickP330
Well-known member
How did you fasten it to the foam / concrete?
Rick
Rick
medic583
Well-known member
Wow... that hammerzone link is great... bookmarked that one sure 
Rick, The vinyl transition is attached (nailed) to the sill plate (through the sheathing). I have a floating slab with 1 course of block on top. The foam runs to the top of the block, with a z flashing on top of it. On top of the z flashing I installed the vinyl trim, which is beveled, so the first row of siding overlaps it, ended up with 1 1/4" between z flashing and siding.