Wood preservatives - Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact - Horizontal lap-joint method
This Technical Specification describes a method of test for wood preservatives that are intended for
use in wood to be exposed to the weather out of contact with the ground without the additional
protection of a surface coating.
The method is applicable to the testing of commercial or experimental preservatives applied by
techniques appropriate to commercial practice. The method is applicable to chemical products used
individually or in combination to prevent the development of decay and/or – optional – the
development of disfiguring organisms in wood and, where suitable, in wood-based products.
NOTE 1 The method may also be used to test other treated wood species and naturally durable timbers. It
may be adapted for testing the field performance of other wood based systems and treatments designed to
enhance durability, for example treated or untreated wood based composites, timber treated with non-biocidal
systems, chemically modified or heat treated timber.
NOTE 2 Although the test is used to assess decay, it is possible to use the method to additionally assess stain
or each separately when relevant.