How level does the ground beneath the decking have to be?
The flexibility of KwikDek allows it to “bridge” over about 3/8 in. of vertical mismatch in a concrete sub-surface as long as that area is not directly below a parallel KwikDek seam. Extreme unevenness in a concrete surface will need to be repaired or smoothed over with a patching compound prior to KwikDek installation.
