Treat larch wood - do you have to?

In the treatment of larch wood in the outdoor area, there are always uncertainties - should you better oil, paint, or even treat larch wood? In response to all these questions, this article gives a detailed answer to which of the best proven remedies.

Protection of larch wood

High-quality larch wood does not need protection in and of itself. It is very weather resistant, and resistant to pests such as insects and fungi. However, this only applies to the heartwood, sapwood always has to be protected. Even if wood quality is not very high, protection can make sense.

Problems with individual protection agents

Larch wood does not tolerate all paintings. In order to achieve a protection against graying, always pigmented products must be used - otherwise there is no sufficient UV protection, which would prevent graying. Oil varnish and polyester-containing products are not tolerated by larch wood and can not be used there. For other paints, the high tannic acid content of larch wood often requires quite long drying times until the coating cures.

Problem resin

Individual larch woods can be very resinous. The processing is then generally problematic. In some cases, you have to do without treatment because of the high resin content of individual pieces. Resin-soluble agents must always be used before pickling.

Constructive wood protection

Before any treatment of the wood, the so-called constructive wood protection must come. That is, larch wood must always be installed so that the construction method already protects the wood. If this is not the case, chemical wood preservation alone does not make sense.

Problem grayness

The weathering of larch wood surfaces in the outdoor area provides for the formation of a gray-silvery patina after a short time. That may be desirable - or not. The problem is that the weathering effects do not act evenly on all parts of the wood. There are therefore color differences.

Fight grayness or even out

To prevent this, either pre-weathering agents can be used, or the weathering and UV-inhibiting coatings can be prevented. The wood then retains its original color. In the case of chemical pre-weathering, however, the adverse effects on the environment should always be taken into account, and so are certain oil stains sold under the name "Weathering Stain".

Possible protective agents

Here are some questions:

  • Glazes, impregnation glazes (best alternative, as open to diffusion)
  • paints
  • Oils (with weather protection effect, with pigmentation)

Tips & Tricks

It is best always to consult specialist dealers for a suitable product. For wood preservatives, you should generally only rely on tested products, cheap products from the hardware store are often a poor solution and inferior quality.

Video Board: How to Make Butcher Block End Grain Cutting Boards | Où se trouve: Larch Wood