Building in regions with long, freezing winters requires wall systems that can stand up to extreme cold, ice and freeze-thaw cycles, and the EPS Cement Sandwich Wall Panel excels in these harsh conditions. The closed-cell EPS core inside the EPS Cement Sandwich Wall Panel does not absorb water, so even if moisture somehow reaches the panel, it will not freeze and expand to crack the wall when temperatures drop below zero. Independent freeze-thaw testing shows that after 150 cycles of freezing at -20°C and thawing at 20°C, the EPS Cement Sandwich Wall Panel shows zero surface cracking or strength loss, far exceeding the performance of traditional aerated concrete blocks. A 120mm thick EPS Cement Sandwich Wall Panel has an R-value of over 4, which is high enough to keep indoor walls warm to the touch even when outside temperatures drop to -30°C. This eliminates the problem of condensation forming on interior wall surfaces, which is a major cause of mold growth in cold climate homes. Many construction teams in Canada, Northern Europe and Northern China now use the EPS Cement Sandwich Wall Panel as their default exterior wall material, because it delivers reliable warmth without the extra thickness and cost of multi-layer traditional wall systems.