Where necessary, to prevent heat loss through the floor and foundation walls, ____made of extruded polystyrene is installed under the concrete slab.
A) a vapor barrier
B) rigid insulation
C) a seal
D) tarpaulin

Question

Quizplus · Accepted Answer

Rigid insulation made of extruded polystyrene is commonly used to prevent heat loss through the floor and foundation walls. A vapor barrier is a separate layer used to prevent moisture transmission through the slab, but it does not necessarily provide insulation value. A seal may be used to prevent air leakage but would not provide significant insulation value. Tarpaulin is not a suitable material for insulation purposes.

Where Necessary, to Prevent Heat Loss Through the Floor and Foundation