Are the advantages of redwood and cedar slipping?

performance data gathered on I untreated redwood and western red cedar heartwood, untreated southern yellow pine and treated southern yellow pine sapwood stakes shows that the longevity of untreated "naturally durable" woods depends on sapwood-heartwood content, stand age, exposure and end use.

Because fungicide extractive (thu- japlicins) concentrations in second growth are lower, redwood and cedar vary more today than in the past when their reputation for durability was developed, a Hickson Corp. technical report maintains.

Pressure treated material, Hickson claims, provides consistent long term performance in a broad spectrum of applications. Their information was gathered from 3/4 x 314 x 18" stakes embedded to one half their length in ground at an exposure test plot and evaluated yearly until failure occurred due to either decay or termites. Cedar and redwood stakes lasted an average of four to five years, untreated southern yellow pine sapwood two years. Wolmanized pressure treated SYP was in good condition after 20+ years.