What is it made of ?

Nothing fancy.

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Only well known materials composed in an innovative way

Plywood

Galvanized

steel profile

Cement bonded particleboard

Galvanized

steel profile

DX51D-Z275

Class 1 Firerating

Cement bonded

particleboard

CE-marked

PEFC-certified

Material class A

Cladding class 1

(K1 10 - B-s1,d0)

Plywood

Pine and birchwood

CE-marked

FSC-certified

Material class B

Cladding class 2

(K1 10 - D-s2,d0)