Commission Delegated Regulation (EU) 2024/1399 of 10 November 2023 on the conditions for classification, without testing, of solid wood panelling and cladding with regard to their reaction to fire and amending Decision 2006/213/EC

Article 1

Solid wood panelling and cladding which fulfil the conditions set out in the Annex shall be deemed to satisfy the classes of performance indicated in the Annex without testing.

Article 2

Table 2, including figures (a) and (b), of the Annex to Decision 2006/213/EC is deleted and replaced by the table, and figures (a) and (b), set out in the Annex. References to Table 2, and figures (a) and (b), of the Annex to Decision 2006/213/EC shall be construed as references to the table and figures set out in the Annex.

Article 3

This Regulation shall enter into force on the ninetieth day following that of its publication in the Official Journal of the European Union .

CLASSES OF REACTION TO FIRE PERFORMANCE FOR SOLID WOOD PANELLING AND CLADDING

ANNEXSupplementary provisions

ANNEX CLASSES OF REACTION TO FIRE PERFORMANCE FOR SOLID WOOD PANELLING AND CLADDING Product  ( 11 ) Product detail  ( 5 ) Minimum mean density  ( 6 ) (kg/m 3 ) Minimum thicknesses, total/minimum  ( 7 ) (mm) End-use condition  ( 4 ) Class  ( 3 ) Panelling and cladding  ( 1 ) Untreated wood pieces with or without tongue and groove and with or without profiled surface 390 9/6 Without air gap or with closed air gap behind D – s2, d2 12/8 D – s2, d0 Panelling and cladding  ( 2 ) Untreated wood pieces with or without tongue and groove and with or without profiled surface 390 9/6 With open air gap ≤ 20 mm behind D – s2, d0 18/12 Without air gap or with open air gap behind Wood ribbon elements  ( 8 ) Untreated wood pieces mounted on a support frame  ( 9 ) 390 18 Surrounded by open air on all sides  ( 10 ) D – s2, d0 Figure a Profiles for solid wood panelling and cladding Figure b Maximum exposed area of wood ribbon element 2n (t + w) + a ≤ 1,10 n = number of wood pieces per metre t = thickness of each wood piece, in metre w = width of each wood piece, in metre a = exposed area of wood support frame (if any), in m 2 , per m 2 of wood ribbon element ( 1 )   Mounted mechanically on a wood batten support frame, with the gap closed or filled with a substrate of at least class A2 – s1, d0 with minimum density of 10 kg/m 3 or filled with a substrate of cellulose insulation material of at least class E and with or without a vapour barrier behind. The wood product shall be designed to be mounted without open joints. ( 2 )   Mounted mechanically on a wood batten support frame, with or without an open air gap behind. The wood product shall be designed to be mounted without open joints. ( 3 )   Class as provided for in Table 1 of Annex to Delegated Regulation (EU) 2016/364. ( 4 )   An open air gap may include possibility for ventilation behind the product, while a closed air gap will exclude such ventilation. The substrate behind the air gap must be of at least class A2 – s1, d0 with a minimum density of 10 kg/m 3 . Behind a closed air gap of maximum 20 mm and with vertical wood pieces, the substrate may be of at least class D – s2, d0. ( 5 )   Joints include all types of joints e.g., butt joints and tongue and groove joints; Untreated wood is a wooden material that was not coated and was not subject to any kind of treatment other than kiln drying (physical, chemical, impregnation, or other treatments). ( 6 )   Conditioned according to EN 13238. ( 7 )   As illustrated in Figure a. Profiled area of the exposed side of the panel not more than 20 % of the plane area, or 25 % if measured at both exposed and unexposed side of the panel. For butt joints, the larger thickness applies at the joint interface. ( 8 )   Rectangular wood pieces, with or without rounded corners, mounted horizontally or vertically on a support frame and surrounded by air on all sides, mainly used close to other building elements, both in interior and exterior applications. ( 9 )   Maximum exposed area (all sides of rectangular wood pieces and wood support frame) not more than 110 % of the total plane area, see Figure b. ( 10 )   Other building elements closer than 100 mm from the wood ribbon element (excluding its support frame) must be of at least class A2 – s1, d0, at distances 100–300 mm of at least class B – s1, d0 and at distances more than 300 mm of at least class D – s2, d0. ( 11 )   Applies also to staircase risers.