XPS vs EPS — Below-grade slab insulation
Home Depot now sells pink XPS from Owens Corning. A 10 foot sheet by 2 feet wide was only $10 per sheet. The R-Value was R-5 per inch of foam.
I like the way XPS is easy to score and break without having EPS snow everywhere. The XPS also carries a higher R-Value per inch.
Which is better to use below grade under a slab? Which can carry the higher concrete loads of a slab?