BS 8605-1:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Moisture content
6 Durability against biological attack
7 Species
8 Grade
9 Geometrical characteristics
10 Warp
11 Resistance to fixing
12 Dimensional stability
13 Reaction to fire
14 Resistance to deformation
15 Bonding quality
16 Coating systems
17 Wood density
18 Hygrothermal performance
19 Release of dangerous substances
20 Moisture resistance
21 Airborne sound insulation
Annexes
Annex A (informative) - CE marking of external timber cladding
Annex B (normative) - Sampling of boards
Annex C (informative) - Characteristics of timber species
Annex D (informative) - Timber durability selection
Annex E (normative) - Timber grading for boards
Annex F (informative) - Geometrical characteristics of boards
Annex G (informative) - Reaction to fire
Bibliography

Defines methods of specifying the characteristics of external timber cladding products from which selection has to be made and for which values might have to be agreed between the purchaser and manufacturer.

This part of BS8605 describes methods of specifying the characteristics of external timber cladding products from which selection has to be made and for which values might have to be agreed between the purchaser and manufacturer.

This part of BS8605 complements harmonized standards BSEN14915 and BSEN13986. It lists all performance requirements that might apply to external timber cladding in the UK and provides a method of specifying those requirements that are outside the scope of those standards, but which are relevant to the UK’s climate and construction practices.

This part of BS8605 specifies characteristics of components at the time they are transferred to the purchaser. It is intended for use by specifiers of external timber cladding components.

NOTE1 Suppliers can refer to this British Standard for guidance when manufacturing external timber cladding components and preparing technical documentation.

This part of BS8605 applies to external timber cladding designed to function as a rainscreen. The types of external timber cladding components covered by this standard are boards, shingles and shakes, and wood-based panels. Requirements are listed separately for each of these product types.

NOTE2 BS8605‑2 gives guidance for designers of external timber cladding assemblies and installers of such products on site. It also gives guidance on the selection of other components in the external timber cladding assembly. These include, for example, cavity barriers, breather membranes, fasteners and flashings.

This part of BS8605 does not apply to components to be used as non-rainsceen cladding, roofing, solar shading, pressure equalized cladding, double skin facades, curtain walling or any kind of wall covering intended solely for interior use. Nor does it apply to cladding made of composite materials such as fibre cement board or wood-plastic composites.