Meranti with or without wood protection?

Coating for wooden windows

For decades, meranti has been one of the most important imported woods in Europe. It is used for window construction in many countries, thanks to its favourable properties. However, varying quality levels on the market lead to frequent questions regarding coating. The most important being: does meranti need wood protection?

Out of the roughly 150 species in the genus Shorea, red and yellow meranti are the main ones used in window construction. There are significant fluctuations in gross density amongst the individual species which affect durability and thus the coating needed. Investigations by the Thünen Institute of Wood Research (Hamburg) indicate that the aforementioned meranti woods reach durability classes of 2 to 4, depending on species and gross density.

Our Teknos application technicians will be glad to help you with any questions you may have on ideal coatings for meranti. Just ask your local Teknos contact person!

Wood protection at durability class 3 and up Based on its long-term experience, Teknos expressly recommends impregnation for meranti of durability class 2 or poorer. Here’s what this means for the species of meranti typically used in window construction:

Wood speciesGross density
(g/cm3)
Durability
(acc. to EN 350-2)
Coating
Light Red Meranti (SHLR) ≥ 0,45 Class 3-4 with wood protection
Dark Red Meranti (SHDR) ≥ 0,55 Class 2-3 without wood protection
Gelbes Meranti (SHYM) 0,50-0,70 Class 3-4 with wood protection

(Table according to Thünen Institute of Wood Research, coating recommendation from Teknos)

 

Teknos recommends the following system as an optimum coating for meranti woods in window construction:

CoatOpaqueTranslucent
Impregnation
(if necessary, see above)

TEKNOL AQUA 1410
(resp. GORI 356)
TEKNOL AQUA 1410
(resp. GORI 356)
Priming


AQUAPRIMER 2901
(resp. GORI 615)
AQUAPRIMER 2900
(resp. GORI 615)
Intermediate treatment


AQUAFILLER 6500
(resp. GORI 650)
AQUAFILLER 6500
(resp. GORI 650)
Topcoat treatment


AQUATOP 2600
(resp. GORI 660)
AQUATOP 2600
(resp. GORI 660)