The tanalising of timber process

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.