was decided at the outset that the projects should all seek to avoid,
wherever possible, the use of toxic treatments in any roundpole
The traditional method of preserving wood against rot or decay is to treat
it with CCA (Chromated Copper Arsenic). The alternative is now to use
Borax based substances - however given that this is a water based
technique there are issues.
The study of treatments was undertaken in Finland - as a special study -
similar to that undertaken for Glues by Gaia Architects in Scotland.
(source: Gaia Research)
is one of the simplest ways to avoid the need for treatment since the
heartwood of some species is naturally durable and needs no further