One of the most common questions construction teams and property owners ask about the EPS Cement Sandwich Panel is whether it can be safely installed in high moisture wet areas such as bathrooms, showers, kitchens and laundry rooms, where walls are constantly exposed to water splashes, high humidity and steam. Many people assume that any panel containing an EPS foam core will absorb moisture and degrade over time, but the actual real world performance of properly installed EPS Cement Sandwich Panel in wet areas shows completely different results.
The outer cement skins of a quality EPS Cement Sandwich Panel are produced with high density fiber reinforced cement that has a water absorption rate below 5% by volume, making it naturally resistant to direct water splash and daily high humidity. Unlike drywall that softens and loses structural strength after continuous exposure to moisture, the cement surface of the panel will not deform, swell or grow mold even when exposed to regular bathroom steam for many years. As long as you apply a standard waterproof membrane layer over the panel surface before laying tiles, the EPS Cement Sandwich Panel creates an extremely stable base for wet area wall finishing that performs far better than traditional moisture resistant drywall.
There are a few simple best practices you should follow to ensure long term performance when using EPS Cement Sandwich Panel in wet areas. First, when cutting panels to size on site, make sure all exposed cut edges are fully sealed with a thin layer of waterproof cement coating, so no moisture can reach the EPS core through the open edge. Second, leave a 10mm gap between the bottom of the lowest panel and the finished bathroom floor, and never let the panel sit directly in pooled water on the floor surface. Third, avoid drilling large unprotected holes through the panel in areas that are directly behind shower fixtures, where water pipes pass through the wall. When these simple steps are followed correctly, thousands of completed projects have proven that EPS Cement Sandwich Panel can deliver over 20 years of trouble free performance in bathroom and kitchen wet areas.
