The last two years has seen some important changes in standards and preservative types used in Scandinavia, which have led to a wider choice for specifiers. In order to identify those treatments suitable for replacement or reinforcement of decayed constructional timbers, it was felt necessary to modify the standard EN 113 test. Impregnated blocks were sandwiched between two untreated blocks, previously infected with either Coniophora puteana, Poria placenta or Serpula lacrymans. The assemblies were exposed on a water -agar medium After which weight losses were determined. All treatment combinations resisted attack by Serpula, but CCP proved ineffective against Poria and Coniophora.

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