Key Factors to Consider About Humidity When Laying Wooden Floors

Why Humidity is a Big Deal for Wood Flooring

Wood is a natural, hygroscopic material, which means it loves to interact with its environment. It absorbs and releases moisture based on the air’s relative humidity (rH), and this constant dance can lead to expansion, contraction, or even warping if humidity isn’t kept in check.

Solid wood floors are particularly sensitive. High humidity can make them swell or cup, while low humidity may cause them to shrink or develop gaps. Engineered wood, on the other hand, is much more stable, but it still appreciates a well-controlled environment.

Finding the Sweet Spot: 40-60% rH

To keep your wooden floor happy and looking fabulous, aim for an indoor rH level between 40-60%. This range minimizes the risk of moisture-related issues like cupping or gaps. A trusty hygrometer can help you monitor the levels, and simple tricks—like using a dehumidifier or placing bowls of water around in winter—can make all the difference.

Damp-Proof Membranes (DPMs): Your Floor’s Best Friend

One of the best ways to protect your wood floor from sneaky moisture is to install a damp-proof membrane (DPM), especially when laying it over concrete or other moisture-prone surfaces. This simple but effective barrier stops moisture from creeping up and causing swelling or warping.

A popular choice for DPM is a two-part epoxy resin, which creates a solid barrier. Foam underlays with built-in damp-proofing are also an easy and cost-effective option, providing some insulation and a cushiony feel underfoot.

Wrapping It Up

Humidity might seem like a pesky factor when installing wooden floors, but with a few precautions, it’s easy to manage. Monitor your indoor rH, invest in a quality DPM, and your wood floor will stay beautiful and durable for years to come. After all, a little care now saves a lot of hassle later.