What are uses for willow wood

Willow wood - the wood for industry

Measured value descriptionvalue
Bulk density0.33-0.59 g / cm³
Medium density560 kg / m³
Compressive strength28 - 34 N / mm²
Flexural strength31 - 37 N / mm²
Calorific value4.1 kWh per kg, 1,400 kWh per cubic meter

Types and DIN designation

The white willow is most commonly used today. There are also some other widespread types of willow, which are of little or no importance for the timber industry:

  • Weeping willow (not used for logging)
  • Yolk willow (not used for logging)
  • Broken willow
  • Common willow
  • Osier (a shrubbery, used only for the weaving trade)
  • Purple willow (also a shrub, only used for the weaving trade)

DIN designations and sorting

usedescription
National designation according to DINpasture
Abbreviation according to DINWDE
International designation and abbreviation according to DIN EN 13 556Willow (SAXX, EU)

Look

Grain

The structure looks very even in most types of willow, and looks balanced. Medullary spots are common and numerous.

colour

The sapwood is in most cases very light, almost white, but can also be slightly yellowish. The heartwood, on the other hand, is clearly defined, light brown to slightly reddish.

properties

Willow wood is very soft, light and coarse-grained. In terms of its properties, it is comparable to poplar wood. The strength is low, as is the elasticity of the trunk wood (in contrast: osier are shrubs whose branches are very elastic). In general, willow wood is easy to work with, but it frays easily during processing and it is difficult to achieve smooth surfaces.

Shrinkage and drying

The drying takes place without problems, willow wood only shrinks moderately.

resistance

Willow wood - like poplar wood - is not weather-resistant, nor is it resistant to fungal and insect attack. A treatment with wood protection is only possible with sapwood, the heartwood is difficult to protect against moisture.

use

Industrial use

Like the poplar, willow is primarily a timber. It is mainly used commercially as industrial wood and round wood, besides it is also an important energetic timber. Because of the rapid growth of willows (harvests are possible after a few years), it is often used for energy. The amount of heat per cubic meter is less than with hard hardwoods such as beech wood, but willow wood grows back much faster. It is also used in paper, cellulose and wood wool production.

Other use

Occasionally, snow shovels, a few household appliances and toothpicks are made from willow wood, and it is rarely used as veneer wood or for furniture construction. In England, cricket bats are traditionally made exclusively from willow wood (therefore the corresponding type of willow in England is also called "cricket willow").

origin

A large part of the willow wood used today comes from so-called "short rotation plantations", these are fast-growing plantations that are primarily set up for the cultivation of energetically used wood and are geared towards very fast wood extraction with a high level of sustainability. Short rotation plantations enable a much more CO? -Saving and less energy-intensive production method for timber than the classic timber industry.

Here you will find an overview of the most important types of wood worldwide.

If you want to use willow wood for heating, look for a cheap price. Willow wood generates around a third less heat per cubic meter than, for example, beech wood. In addition, there is significantly more ash. However, this can still be worthwhile at low prices.