Treated to the core

Pressure-treated sheds

All timber shed treatments are not the same. A dip-treated shed has been passed through a bath of preservative that coats the surface — and needs re-doing regularly to stay effective. A pressure-treated (tanalised) shed has had Tanalith E preservative forced deep into the timber cells inside a vacuum vessel, so the protection is in the wood, not on it.

Every timber building we make is pressure-treated as standard — the shiplap cladding, the 38×50mm framework and the tongue-and-groove floor boards — using timber rated Use Class 3 for outdoor structures. A breathable membrane behind the cladding keeps the walls dry from the inside out, and the building carries a 15-year anti-rot guarantee.

What that means for you is simple: no annual re-treating chore. An optional coat of colour treatment every two to three years keeps the finish looking the way you want it, but the rot protection is built in from day one. Browse the timber range below, or read exactly how tanalising works in our plain-English explainer.