About to Spray Foam the entire floor...

[stokebus]

I've got the Foam It Green setting here and am prepared to do the following: Spray the walls from the windows down and also the entire floor.

Plan is to lay down 1" furring strip grid and screw the grid together so it is basically laying there on the floor without being screwed to the floor... then spray a 1" foam insulation down and therefore secure the grid in place without any holes in the floor (everything has been sealed, painted and is 100% currently).
Then screw down the subfloor onto the furring grid... and the kicker is I'll run a framing stud along the lower wall edge (right above the 1" lip) and secure the edge of the plywood to that wall along both sides.

Is this a horrible plan or mad genius?

[M1031A1]

Originally Posted by stokebus

I've got the Foam It Green setting here and am prepared to do the following: Spray the walls from the windows down and also the entire floor.

Plan is to lay down 1" furring strip grid and screw the grid together so it is basically laying there on the floor without being screwed to the floor... then spray a 1" foam insulation down and therefore secure the grid in place without any holes in the floor (everything has been sealed, painted and is 100% currently).
Then screw down the subfloor onto the furring grid... and the kicker is I'll run a framing stud along the lower wall edge (right above the 1" lip) and secure the edge of the plywood to that wall along both sides.

Is this a horrible plan or mad genius?

Good enough to me......

M

[stokebus]

Thanks @M1031A1
I'm just surprised I haven't seen anyone else do this?

[M1031A1]

Originally Posted by stokebus

Thanks @M1031A1
I'm just surprised I haven't seen anyone else do this?

I guess you haven't read my thread then...... No biggie....

M

[stokebus]

Mebbe help a brother out with a link? the search for your stuff is extensive

Is this it? Heavy Fuel

[john61ct]

The challenge will be ensuring a 100% fill at 1% but minimizing the overage.

Which will need removal via scraping / sawing.

I would personally use slabs of rigid foam like polyiso for the bulk of it, then the spray foam just to fill the gaps and corners (you do want as continuous an envelope as possible) .

Better R-value per inch, cheaper and easier.

Better compression strength too, so no need for the furring woodwork.

Only flooring needed over the foam board is to spread weight a bit, avoid puncturing, and decoration, no need for *heavy* plywood.

Maybe a HD plastic sheeting, taped edges vapor barrier in between, to prevent any spills/flooding from penetrating

[Twigg]

Originally Posted by john61ct

The challenge will be ensuring a 100% fill at 1% but minimizing the overage.

Which will need removal via scraping / sawing.

I would personally use slabs of rigid foam like polyiso for the bulk of it, then the spray foam just to fill the gaps and corners (you do want as continuous an envelope as possible) .

Better R-value per inch, cheaper and easier.

Better compression strength too, so no need for the furring woodwork.

Only flooring needed over the foam board is to spread weight a bit, avoid puncturing, and decoration, no need for *heavy* plywood.

Maybe a HD plastic sheeting, taped edges vapor barrier in between, to prevent any spills/flooding from penetrating

Close to my plan except I wouldn't add a second vapor barrier.

If water does get under it, it has nowhere to go. It will sit there waiting, until it crushes your dreams

[M1031A1]

Yeah, that's the beginning of it Stoke. Sorry, I really don't wake up until the crack of one in the afternoon.....

M