Concrete acts like a massive sponge. Even if a slab looks completely dry on the surface, it constantly draws invisible water vapour up from the ground below. If you glue a solid or engineered timber floor directly to an unprotected slab, the wood will absorb that moisture, expanding until it cups, warps, or completely tears itself off the foundation.

As Auckland’s trusted flooring contractor specialists, Endless Flooring takes the guesswork out of sub-floor preparation. We utilise professional-grade hygrometers to scientifically measure the relative humidity deep inside your concrete. If the moisture levels are too high, we apply premium two-pot epoxy moisture barriers. This creates an impenetrable seal that completely blocks rising dampness, ensuring your new floor remains structurally sound and your manufacturer warranties remain valid.