Post Pier – Skirting Siding, Rigid Under-Floor Insulation, Ground Cover
Howdy! We’re self-building a log cabin on Whidbey Island, Washington (Marine-4 Climate Zone). It’s definitely been an adventure! I’m hoping for a bit of help to augment the great articles already on the site.
Our foundation is an alternate post pier system (FoundationFrame), with structural walls between the post (see pics).
Skirting Siding – I’m planning to frame to the ground and put on a low-profile (1/4″ corrugated or flat style panel) metal siding on the skirting. Do I need to put a weather barrier on the plywood in this scenario? I won’t be making the under floor space airtight (see next question). Also, should I space off the panels from the plywood at all?
Under-floor Insulation – I like the suggestion of rigid foam under floor for thermal bridging suggested on this site. Do I need to put plywood to cover that if I put hardware cloth around the perimeter to keep rodents out? If so, I’m having trouble figuring out how to attach the plywood to the foam. Do I run a 2×4 or something between foam sheets to screw/nail to?
Lastly, I intend to use the space for storage to some degree. I believe I’m required to cover with 6mil plastic per WA code (and have ventilation holes). Is it reasonable to just walk on the plastic when I’m down there or should I consider something on top of the plastic? Any suggestions as to what?
Thanks for all the great information!
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