Alex Bennett-Ford
Tanalising timber
The Tanalising process.
Stage one
The Tanalising process involves placing the timber within the treatment cylinder
and creating an initial vacuum within the timber cells.
Stage two
The cylinder is then flooded under vacuum with the preservative treatment.
Stage three
Hydraulic pressure is then applied forcing the preservative deep into the timber
cells.
Stage four
After a pre-determined period of pressure depending on the species of timber
being treated and its eventual use, the treatment solution is pumped back
into storage and a final vacuum extracts any excess treatment solution from the
timber.
Stage five
Low pressure inside the timber draws in surface solution when vented to the
atmosphere and the treated timber is left for a specified period for fixation of
preservative to occur.
Basic summary
Tanalised timber is a type of timber that is usually impregnated under pressure
with highly toxic substances such as arsenic in order to protect it against rot
and termites. This treatment process ensures deep penetration into the timber
cells, for a longer-lasting protective results against fungal decay and insect
attack. The Tanalising process is environmentally friendly, also the residue isn't harmful. At times the process can leave green residue on the surface which will usually wear off with use. The treatment described above gives softwood the qualities of a long service life and long term protection from fungal and insect attack.
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