RESISTANCE CLASSES
Wood is a biological material. Its natural resistance against wood-destroying fungi is influenced by various factors. Based on the currently available information, EN 350 provides a guideline for the durability of heartwood of selected wood species against fungal decay. 

Resistance Class

Commercial Name

Density kg/m3

Origin

1

Accoya

510

Europe

IPE

1060

Latin America

Kebony

640

Europe

Teak

680

South/East Asia

Thermo Ash

650

Europe

Thermo Spruce

300

Europe

1 to 2

Black Locust

740

Europe

Bamboo

1000-1200

Africa, Asia

2

Bangkirai

1000

South/East Asia

Oak

710

Europe

Megawood

1200

Europe

Thermo Pine

350

Europe

3

Siberian Larch

700

Russia

3 to 4

Douglas Fir

510

Europe

Pine

520

Europe

Larch

550

Europe

5

African Ayous

390

West Africa

General Principles of Performance Classification
The durability tests enable a performance classification against "reference materials" that have been tested in the same manner. The results do not provide an absolute value of the service life, but they allow for the categorization of the performance of different woods and wood products for a given testing field and a specified intended use class.

Resistance Class

Definition

1

very durable

2

durable

3

moderately durable

4

less durable

5

not durable

Prerequisite for a long lifespan is proper installation. Wood-specific changes due to weathering, such as the greying process, blue stain formation, or the development of stress and surface cracks, do not affect the lifespan. The resistance classes describe or classify the inherent durability of wood against wood-degrading fungi, insects, termites, or other wood pests. The resistance classes (also known as durability classes) are scaled from 1 (very durable) to 5 (not durable).
Resistance Classes
Wood is a biological material. Its natural resistance against wood-destroying fungi is influenced by various factors. Based on the currently available information, EN 350 provides a guideline for the durability of heartwood of selected wood species against fungal decay.

Resistance Class

Commercial Name

Density kg/m3

Origin

1

Accoya

510

Europe

IPE

1060

Latin America

Kebony

640

Europe

Teak

680

South/East Asia

Thermo Ash

650

Europe

Thermo Spruce

300

Europe

1 to 2

Black Locust

740

Europe

Bamboo

1000-1200

Africa, Asia

2

Bangkirai

1000

South/East Asia

Oak

710

Europe

Megawood

1200

Europe

Thermo Pine

350

Europe

3

Siberian Larch

700

Russia

3 to 4

Douglas Fir

510

Europe

Pine

520

Europe

Larch

550

Europe

5

African Ayous

390

West Africa

General Principles of Performance Classification
The durability tests enable a performance classification against "reference materials" that have been tested in the same manner. The results do not provide an absolute value of the service life, but they allow for the categorization of the performance of different woods and wood products for a given testing field and a specified intended use class.

Resistance Class

Definition

1

very durable

2

durable

3

moderately durable

4

less durable

5

not durable

Prerequisite for a long lifespan is proper installation. Wood-specific changes due to weathering, such as the greying process, blue stain formation, or the development of stress and surface cracks, do not affect the lifespan. The resistance classes describe or classify the inherent durability of wood against wood-degrading fungi, insects, termites, or other wood pests. The resistance classes (also known as durability classes) are scaled from 1 (very durable) to 5 (not durable).
Serafin Campestrini GmbH
Linzerstraße 36
4100 Ottensheim
Österreich

Tel.: +43 7234 83195-0
Fax: +43 7234 82226
E-Mail: seca@seca.at


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© Copyright 2024 Serafin Campestrini GmbH. All rights reserved. Powered by Sana Commerce.
Serafin Campestrini GmbH
Linzerstraße 36
4100 Ottensheim
Österreich

Tel.: +43 7234 83195-0
Fax: +43 7234 82226
E-Mail: seca@seca.at

Verfolge uns unter:
Bezahlmöglichkeiten:
© Copyright 2024 Serafin Campestrini GmbH. All rights reserved. Powered by Sana Commerce.