Wood Lexicon Betterwood Technical terms

durability classes

Also referred to as resistance or durability, is usually according to the standard DIN EN 350-2 determined. Here the resistance to insects, fungi and harmful substances, which increase the rotting of the wood, is tested. The classification is from class 1 (very durable) to class 5 (not durable). Class 1 wood (e.g. cumaru or teak) has a life expectancy of more than 25 years under moderate climatic conditions. Class 3 wood (such as Bangkirai) has a life expectancy of up to 15 years. Class 5 wood (e.g. beech) has a life expectancy of less than five years (see: wood species comparison).

DURABILITY CLASSES WOOD

Here you will find an overview of what the resistance class says about the lifespan of wood outdoors:

Class

Lifespan

Types of wood

1 = very persistent

at least 25 years

Teak, cumaru

1-2 = very persistent

at least 20 years

Jatoba, Garapa

2 = permanent

15 to 25 years

Bongossi, Bangkirai

3 = moderately durable

10 to 15 years

Siberian larch, Douglas fir

4 = not very durable

5 to 10 years

Spruce

5 = not permanent

less than 5 years

Maple, birch, beech

6,50 

Cumaru wood tiles, FSC 100%
Price: €72 per m2, resistance class: 1

Advantages: ✓ best durability ✓ particularly robust and scratch-resistant

Disadvantages: ✗ partly rough surface

Tip:Sand tiles after initial exposure to weather.

ab 6,50 

Teak decking, FSC 100%
Price from: €130 per m2, resistance class: 1

Advantages: ✓ Best durability and dimensional stability ✓ Lowest risk of cracks and splinters

Disadvantages: ✗ relatively expensive ✗ not very long boards

Tip: Lay decking boards together.

ab 11,50 

Cumaru decking, FSC 100%
Price from: €70 per m2, resistance class: 1

Advantages: ✓ best durability ✓ particularly robust and scratch-resistant

Disadvantages: ✗ partly rough surface ✗ high power development

Tip: Sand the floorboards after they have been exposed to the weather for the first time.

6,50 

Jatoba wood tiles, FSC 100%
Price from: €72 per m2, resistance class: 1-2

Advantages: ✓ smooth surface ✓ strong color and grain

Disadvantages:✗ unoiled tendency to crack ✗ colored ingredients wash out

Tip:Clean and oil tiles after installation.