Spray foam insulation is likely the best option for below floor insulation.
Concrete floor insulation options.
View the owens corning 2x6 wall floor insulation 605 00 pallet 605 00 pallet standard delivery.
Concrete 34 copper pipes 24 existing drywall 34 existing insulation 26 fiberglass 25 metal 33.
Although building codes differ by region builders typically use r5 and r10 insulation under the concrete slab but floors insulated with r20 contain the heat in your basement far better than those insulated with lower r values.
Overlap the seams about 6 to 8 inches and seal the seams with waterproof construction tape.
Foam in place insulation is sprayed into spaces between the joists and goes around venting pipes and electrical work.
The most expensive option.
It is the longest lasting and the highest r value insulation that can be put into place.
Run the polyethylene up the sides of the walls 3 to 4 inches and secure to the walls with construction tape.
Concrete slab floors are typically insulated with polystyrene board.
The good news is that all the mentioned products can be found right here at insulation shop.