Scotts Pine test stakes were dip treated for 30 minutes in a 3% solution of CCA – Copper/Chrome/Arsenic (to provide a so-called mild preservative treatment)
Twenty test stakes in total were used in the following format:
• Ten test stakes with low-level preservative treatment
• Ten test stakes with low-level preservative treatment but also fitted with Postaver ground-line barrier sleeves.
The test stakes were then installed at BRE test site at Princes Risborough and later at the test site in Watford.
The stakes were graded for decay using a scale of 1 to 40.