What is the best sill sealer option for a 8″ sill plate?
I am building my home with Foxblock ICF’s for the foundation wall. Because I want my exterior sheathing to line up with my foundation foam, the sill plate needs to overhang the concrete by about 2″ which forces me to size up the sill plate larger than a standard 2×6. When I go to a 2×8 sill plate, you don’t have many premium options for a sill sealer, like the epdm gasket from conservation technologies that is only manufactured to fit a 2×4 or 2×6. I am struggling to come up with a solution I feel 100% about so I was hoping to get some input and educated opinions. I have come up with 3 possible solutions but maybe there is an option I am missing?
1. Center the 6″ epdm gasket from conservation technologies on the 2×8 plate with a bead of acoustical caulk on each side
2. Buy a roll of 5/64″ thick epdm rubber and put a bead of acoustical caulk under and on top of the epdm strip. ( https://www.fixturedisplays.com/index.php?_route_=Roofing_Supply_11809 )
3. Use the “standard” foam sill sealer and put a very large bead of acoustical caulk above and below the foam.
I am leaning toward option #1 or #2 but would like some opinions!
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