Weatherproof types of wood at a glance


Wood is one of the oldest building materials ever - and a classic. Not only for indoor use, but also for outdoor use. However, a prerequisite for this is, of course, that suitable wood be used for garden furniture, terrace paving or house cladding. Depending on the tree species, the wood has very different hardness and properties - and some woods are also weather-resistant by nature.

Weatherproof woods and their properties

Different types of wood have a different degree of weathering resistance, depending on the area of ​​use, the hardness plays a certain role. The most commonly encountered outdoors, especially when it comes to terrace or garden furniture, today Robinia, Douglas fir and larch as native woods. They survive weather conditions relatively well, and are also relatively hard and stable.

Robinia - Latin Robinia pseudoacacia and abbreviated DIN in the DIN with ROPS, is also known in this country under the name false acacia. It is one of the most enduring native wood species, needs no impregnation and naturally has a pale yellow to slightly greenish color. Robinia wood is often used for wood pavements and because of its hardness, for example, for the construction of playground equipment. Acacia woods and related woods are generally very hard woods, but often difficult to work with.

Douglas fir - in Latin Pseudotusga menziesii, in the DIN PSMN is contrary to the Robinie however a comparatively soft wood finds often also as lumber use, beside it also for railway sleepers and as wood for garden furniture. Douglas fir wood is resistant to weather, but usually not quite as durable as other types of wood.

Larch wood - Latin Latrix decidua, in the DIN therefore LADC, is a classic for rustic furniture, occasionally also for outdoor use. As with many types of wood among the softwoods its partly high resin content is responsible for the fact that it is relatively weather-resistant, but larch is also very high priced and not every wood is equally well suited.

In addition to the local woods also exotic woods play a role as weatherproof wood, mainly teak, but also the lesser known Azobé or Balau.

Teak, in Latin Tectona grandis in the DIN TEGR, has a reddish brown color and is used in addition to outdoor furniture traditionally also in shipbuilding. It is considered very valuable and extremely durable, and withstands weather conditions usually quite a long time, is also extremely frost hardy.

Azobé, in Latin Lophira alata, in the DIN LOAL, is also known under the name Bongossi - it is considered inexpensive, extremely hard wood in a very noble look, which is present in a wide assortment. Its hardness may make it harder to work on.

Balau, Latin Shorea laevis, in the DIN SBHL has a reddish-yellow hue and is often marketed in this country under the name Bankirai. Its hardness is not quite as pronounced as Azobé, but its weather resistance is almost as good as its resistance to frost.

Of course, for the sake of completeness, bamboo must also be mentioned as a weatherproof material, even though it has practically no significance as a building material in our latitudes.

For outdoor construction, such as terrace paving of wood or garden furniture, these types of wood are particularly well suited, availability and prices are different here.

II Sources and Prices

In principle, all weather-resistant types of wood can be obtained from the classic timber trade, but domestic woods are generally much easier to get. However, rare tree species, such as the Azobé native to the Ivory Coast, may cause difficulties in getting it. Especially with tropical woods, it is usually harder to get the timber as timber, in many cases you get in Germany much easier finished products from these weather-resistant species. The prices here are very different - teak is considered particularly expensive, but here also in view of the very different commercially available quality enormous price ranges prevail, play a role in this age and trunk diameter. The price of teak in international trade is from about $ 100 for the cubic meter to about ten times or more. To a lesser extent, this also applies to all other woods, but a little less for the native ones. Douglas fir is both processed as well as sawn wood generally the cheapest, as bolt wood with 9 × 9 inches in 3 meters in length costs Douglas fir wood about 20 euros.

III plates and other "finished products" made of weatherproof wood

Terrace slabs, substructures and decking boards made of wood are today almost exclusively from Douglas fir, because of the low price. Garden furniture is often found in teak, but then usually relatively high priced. But they are so durable that they can be used over several generations. Even after forty to fifty years, teak furniture often shows no signs of wear and tear due to the weatherproof wood. Larch, robinia and bangkirai, on the other hand, are much rarer, with robinia wood occasionally also being used for fences and fence posts.

Treat wood to the outside and make it durable

In addition to the possibility of pretreating wood industrially in such a way that it can be used outdoors, for example by means of hot-pressing processes, especially coatings with varnishes and oils play the most important role in weatherproofing wood. Best is here again and again boat paint, which is expensive, but gives the wood actually good protection. In the specialized trade there are beside it a multiplicity of paints, which are to make the wood weather-resistant after one or two times application. Anti-blueing also plays an important role in such industrial products - blueness is generally the biggest enemy of outdoor wood. Such finished greases are usually the easiest to apply, oils such as linseed blends require a little more skill.

V Care tips for treated wood and weatherproof woods

Treated wood should occasionally be repainted to protect against weathering and weathering. In the case of naturally weatherproof woods, a treatment is generally not necessary, but a protective coating with materials suitable for the wood is nevertheless recommended. However, it usually only rarely, if at all, does not need to be repeated.

Wood - especially domestic woods - are a valuable, very natural building material, which is therefore preferable to plastics in any case. Since this is also a renewable raw material, wood is finding more and more use in outdoor areas as well.

Ecologically compatible thanks to certificates

Illegal clubbing and problematic cultivation methods are a very big problem, especially with tropical woods - so great destruction of the rainforest, which is indispensable for the global climate, is done out of sheer profit. To exclude this, more and more certificates are circulating, on the basis of which one can understand that the respective wood was actually planted and "harvested" ecologically compatible, and the management is actually sustainable. You should look for tropical wood in any case for such a certificate.


Video Board: Simple Instructions for Staining Wood