Use of the durable species Coast Redwood as a reference system for field testing of Wood Protection systems
A Zahora, A Preston, L Jin
Data is provided and discussed for a number of field exposure tests where the naturally durable wood species Coast redwood, Sequoia sempervirens, was included along with untreated pine and standard preservative treatments. In general, there is potential for higher variability of results with this naturally durable species, but it does suggest that redwood can be a useful reference material for testing systems for above ground applications, especially where long-term decay performance may not be as critical as overall product quality. Comparative performance of products to redwood heartwood at test sites with different climate indices and with different test methods may provide additional useful data on the relative performance of systems than when compared to only untreated pine sapwood and standardized preservative systems.
Keywords: field testing, coast redwood, Sequoia sempervirens, above ground, ground proximity, in-ground test, lap-joint, sandwich test, site influence