05-26-2022, 01:53 PM
It looks like XPS panels can be had as thin as 1" with R=5. Compressive Strength (minimum) ranges from 20 up to 100 psi. Fasten that to the decking and then a roll of carpet on top?
Would would be a reasonable minimum psi rating for foot traffic and furniture? A 4-legged chair with a 200 pound person could easily generate 50psi on each foot as a static load, forget about when they actually plop down into it. Not sure what the cost ranges from for the 50-100psi rated panels.
I could probably do a layer of masonite on top of the XPS adding another 1/8". That's really hard stuff. Then carpet but no pad? Sure would be nice if the XPS came in 1/2 or 3/4.
What about cork? (he says to himself).
EDIT:
It looks like Cork has R value of 3.6-4.2 per inch1, and much better compressive strength starting at 1mPA which is ~145 psi2. Of course it is more expensive than the XPS at about $5/sqft.3 versus about $1 for 1", but it would not require any other covering for looks or protection. Probably would still lay an area rug though.
1- https://thermalcorksolutions.com/cork-insulation-faqs/
2- https://en.wikipedia.org/wiki/Cork_(mate...4.0%20MPa).
3- https://www.amcork.com/products/cork-she...0553397076
Would would be a reasonable minimum psi rating for foot traffic and furniture? A 4-legged chair with a 200 pound person could easily generate 50psi on each foot as a static load, forget about when they actually plop down into it. Not sure what the cost ranges from for the 50-100psi rated panels.
I could probably do a layer of masonite on top of the XPS adding another 1/8". That's really hard stuff. Then carpet but no pad? Sure would be nice if the XPS came in 1/2 or 3/4.
What about cork? (he says to himself).
EDIT:
It looks like Cork has R value of 3.6-4.2 per inch1, and much better compressive strength starting at 1mPA which is ~145 psi2. Of course it is more expensive than the XPS at about $5/sqft.3 versus about $1 for 1", but it would not require any other covering for looks or protection. Probably would still lay an area rug though.
1- https://thermalcorksolutions.com/cork-insulation-faqs/
2- https://en.wikipedia.org/wiki/Cork_(mate...4.0%20MPa).
3- https://www.amcork.com/products/cork-she...0553397076