Spray foam insulation is likely the best option for below floor insulation.
Under concrete floor insulation options.
Concrete slab floors are typically insulated with polystyrene board.
Underslab floor insulation rockwool rigid stone wool boards used as a continuous layer of insulation under a concrete slab can provide the thermal efficiency and mechanical properties required as an alternative to rigid foam.
It is the longest lasting and the highest r value insulation that can be put into place.
Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department.
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.
Foam in place insulation is sprayed into spaces between the joists and goes around venting pipes and electrical work.
Floor 1 garage 3 under slab 5 more ways to filter.
The most expensive option.
R 5 78 rigid foam insulation model 320817.