Woodloc®

The market-leading Kährs Woodloc® joint

In 2000, Kährs revolutionised the flooring industry with its innovative Woodloc® system. For the first time, it became possible to install a floor without using any adhesives. The result: a flush wood floor with perfect joints and without any gaps. Installing floors became quick and easy.

Download Kährs Installation Guide - Woodloc® (pdf)

Installing Kährs flooring

Installing a Kährs floor is easy. The boards are joined together mechanically, using practically invisible joints. Kährs flooring is usually installed using the ‘floating installation’ method. This means that the floor isn’t glued to the subfloor, it is left ‘floating’ above it.

Complete installation instructions are provided in every other pack of flooring. Read these carefully before you start.

Always ensure that the subfloor is dry, sound and level, and remove any old fitted carpets or other materials. Remember to lay a vapour barrier if the structure requires. Calculate the number of boards needed for your area. If the last row is narrower than 30 mm, you will need to saw the first row of boards too. If you are installing a Kährs floor with Woodloc® joints, it’s easier to start on the long side of the room with most doors. If the doors are on the short side of the room, you should start each row of boards next to these. Boards may be installed from both the left and the right.

Preparation – wood is a ‘living’ material

Wood is a hygroscopic material, which means that it adapts to the ambient humidity and contracts or expands according to variations in the indoor climate. This is why it’s important to have an expansion gap between the floor and the wall and other fixed objects. To ensure that the floor does not absorb moisture before installation, it is important not to open the packaging until it’s time to start laying the floor.

To prevent damage to the floor, it is important to ensure that the relative humidity during and after laying the floor remains below 60%. The room temperature and material temperature must be at least
18 °C. Multi-layer flooring should, therefore, be laid after all other work has been completed, e.g. when painting and tiling are finished and the relative humidity (RH) on site is correct.

Important things to bear in mind

When you choose a wood floor from Kährs, you’re choosing something created by nature. At Kährs, we use photos and floor samples to help us to describe the boards as best we can. But, by their very nature, the appearance of the boards may vary from that shown on the photos or samples. If your flooring packs contain a board you don’t like, you may decide not to use it. Or, you may use it to start off or finish up. For this reason, always check boards before installing them, as once laid - regardless of whether you’re carrying out the installation, or a contractor is – you’ll be deemed to have accepted them in your capacity as the purchaser.

  • Floor installation checklist

  • • A floor can only be as good as the subfloor permits.

  • • To avoid moisture absorption, open the packs only as needed during installation.

  • • When installing, the temperature of the materials, subfloor and on site temperature must be
      at least 18°C.

  • • The relative humidity on site must be below 60%.

  • • The subfloor must be dry, clean, sound and sufficiently level.

  • • Soft, springy subfloors must be adjusted.

  • • Make sure that the correct vapour barrier is fitted.

  • • The foam plastic underlay (EPS) must have sufficient compressive strength.

  • • The foam plastic film must comply with applicable thickness tolerances.

  • • Put aside any damaged or faulty boards.