How we build
How pressure-treated (tanalised) timber works
Every Total Sheds timber building is made from pressure-treated timber as standard. Here's what that actually means — and why it beats the dip treatment many cheaper sheds use.
The process, step by step
- 1The problem: untreated timber rotsUntreated timber absorbs moisture and begins to rot when used outdoors — without protection it deteriorates within a few years.
- 2Into the treatment chamberThe timber goes into a sealed industrial autoclave, ensuring complete and uniform treatment of every board.
- 3Vacuum stageA powerful vacuum removes the air from the timber cells so they can absorb preservative deep inside — not just at the surface.
- 4Preservative floodThe chamber floods with copper organic preservative (the tanalising treatment), fully submerging the timber.
- 5Pressure injectionHigh pressure forces the treatment deep into the timber structure. Protection penetrates the wood itself, not just the surface.
- 6The resultDeep protection against rot, fungi and insects — for decades of outdoor life, not seasons.
UC3 rated — built for weather
Timber treatment is graded in Use Classes. UC1 is indoor-only, UC2 covered outdoor; our timber is treated to UC3 — outdoor, above ground, exposed to weather — the class specified for sheds, fencing and decking.
The cheaper alternative is dip treatment: a quick surface coat with none of the deep penetration. It looks the same on day one. It doesn't look the same in year five.
Pressure-treated framework, as standard
UC3-rated protection on every timber building — with a 20-year anti-rot warranty, Standard or Heavy Duty.
