This document specifies a method of test for determining the natural durability of a timber against wooddestroying basidiomycetes cultured on a malt extract agar medium. The method is applicable to all timber species. Furthermore this method can be used to test modified or treated wood. The test method described in this part 2 of EN 113 can be applied to specific wood species, commercial supplies of sawn timber, woodbased materials, wood treated with preservatives and modified wood including heat-treated wood. However, this standard is not intended to determine the effectiveness of wood preservatives used to prevent decay. NOTE 1 Determining the efficacy of wood preservatives used to prevent decay is the scope of EN 113-1. NOTE 2 This method can be used in conjunction with an ageing procedure, for example EN 73 or EN 84. Annex A (informative) contains a guidance on sampling. Annex B (informative) contains some methods of sterilization. Annex C (informative) contains information on the test vessels. Annex D (informative) contains an example of a test report. Annex E (informative) contains information on the test fungi. Annex F (informative) contains the assessment of the results.