The NF EXTERIEUR CTB-X quality mark defines plywood panels with Class-3 gluing (NF EN 314-2 standard) suitable for exterior use and exposure to bad weather for prolonged periods.

For example :

Humid, interior environments : Bathroom, cubicle, floor, roller shutter box. Sheltered exterior environments : Sheathing, roof overhang, wind bracing. Exposed exterior environments : Wall cladding, barge board, facade, exterior woodwork

The NF Extérieur CTB-X quality mark guarantees :

Gluing quality The panel’s biological durability Its mechanical characteristics The internal control requirements

All (non flame-retardant) okoume and poplar plywoods with exterior gluing in the PLYSOROL range are certified NF-EXTERIEUR CTB-X, a label issued by the CTBA (Wood and Furniture Technical Centre), a certification body appointed by AFNOR.

Plywood panels sold under the NF CONTREPLAQUE EXTERIEUR CTB-X brand are guaranteed ten years, provided that they are used in accordance with DTU regulations and according to the rulebook.

In order to provide you with complete protection against any possible forgeries, the NF CONTREPLAQUE EXTERIEUR CTB-X brand is indicated by an ink mark applied to the backside of our panels which is followed by our identification number such as it appears on the certificate (as required by the regulations).