Oak wood
Oak (all native types)
- Durability:
- 2 (DIN-EN 350-2/natural durability) recommended to a lesser extent for permanent contact with the soil, sapwood without durability properties
- Advantages:
- Durable without chemical wood preservation for structures without permanent soil contact, available in all dimensions, also in sleeper shapes
- Quality:
- Untreated, unsorted, typical characteristics for this wood type
- Permitted:
- Dark blue discolourations due to tannic acid, middle-grey discolourations due to weathering (the wood remains healthy underneath the outer discolourations).
Larch wood
Siberian larch (Larix sibirica)
- Durability:
- Cl. 3/4 (DIN EN 350-2)/ natural durability) only suitable for permanent contact with soil if pressure-treated
- Quality:
- Growth structure with particularly narrow annual rings, fine branches, with few knots, carpentry-quality wood, high mechanical durability – the best larch that we can deliver
- Suitability:
- Terraces, bench surfaces, platforms, screening, facades
Robinia wood
Robinia (Robinia pseudoacacia)
- Durability:
- Cl. 1–2 (DIN 68364/EN 350-2)
- Quality:
- Untreated, unsorted, typical wood characteristics
- Permitted:
- To the extent that they do not significantly impair use: Isolated unhealthy points, infrequent occurrence of a hollow core, discolouration due to tannic acid and weathering (the wood remains healthy underneath the outer discolouration)
- Cracks:
- The formation of cracks is permitted according to TÜV in line with DIN 7926-1/Section 4.2.7 and does not represent an increased hazard.
- Note:
- General remarks are often insufficient for various uses. Please discuss your minimum requirements for specific projects with us.