4 Comments

1. 
   jklingel | Oct 30, 2011 01:48am | #1

   What psi foam is used? It
   What psi foam is used? It would be nice to see how they build the footer forms, etc, as well.

2. 
   Skylar Swinford | Oct 30, 2011 11:11pm | #2

   Foam PSI
   John,

   Thank you for checking out the video. Under the footings we are using 2.40-2.50 lb/ft3 EPS39 (Geofoam title) or Type XIV (EPS title). Under the slab we are utilizing 1.35 -1.50 lb/ft3 EPS22 or Type II.

   More info can be found on the project website: http://hammerandhand.com/_blog/Field_Notes/post/Passive_House_construction_time-lapse_a_mountain_of_foam,_delivered/

   Hopefully by next week we will have a video of the next steps in the process. Our intent is to document the project each step of the way.

3. 
   user-1006269 | Nov 02, 2011 09:16pm | #3

   Critters
   Is my concern of ants, termites or critters living in this amount of insulation founded?
   We have done foam panel foundations, but wrapped the foam in 65mil EPDM. I was still a littler nervous about something getting in.

   I wonder if building an uninsulated foundation system is more prudent and then superinsulating inside the basement or on top of a slab and decking over that. I don't know but wonder if it makes sense.

4. 
   kevin_in_denver | Jan 01, 2012 05:20am | #4

   Two Big Reasons for "Outsulation"
   Tom,

   Insulating the outside provides at least two hidden cost savings, in addition to adding beneficial thermal mass:

   1. The concrete can be stained and polished for a durable, almost free floor surface.
   2. Insulating the outside and applying Frost-Protected-Shallow-Foundation principles, the thickened edge slab can be only 16" deep throughout the US.