Tanalised Pressure Treated Sheds

Wood is the perfect material for your shed, workshop or summerhouse, subtly blending in with its natural surroundings whilst offering unparalleled flexibility and durability in construction.  However, even the most hardy of woods is subject to weathering, decay and rot.  That’s why at Ace Sheds we make sure we only provide our customers with the highest quality pressure treated sheds.  Creating the perfect garden office or workshop is the result of a lot of time and planning, therefore you want to make sure it will hold up to whatever the British weather, or wildlife throws at it.  Our methods are tried and tested to ensure your new garden structure will last for many years to come. 

We have two different types of pressure treated buildings, both use the excellent Tanalised Extra treatment with Water repellent built-in for the cladding. Our cheapest version has an 11mm O.S.B Floor and Roof or you could go with our premium buildings which come with a 12mm Tongue & Groove roof and floor which makes the building fully 100% Pressure Treated. View our range of Pressure Treated Sheds today. 

Our Standard Pressure Treatment

All of our 100% pressure treated sheds and buildings are manufactured from quality tongue & grooved redwood (not cheaper rebated cladding) all of which is secured to 50 x 25mm battens with rust resistant stainless steel ring nails. Tongue & grooved roofs and floors on this option are standard along with high quality ironmongery and green mineral felt. Please note: all of our optional extras are available in this range.  Our tanalised timber also has the added benefit of a water repellent, which will provide you with a maintenance free shed or building which will not rot for up to 10 years even in ground contact. 

Tanalised Pressure Treatment

TANALISED®E pressure treated timber is renowned for its durability, colour and quality. All our sheds are treated with the industry leading wood preservative to ensure your garden structure remains robust and attractive throughout its long life-span. Using a combination of copper and organic biocide ingredients the special formulation ensures protection against wood decay and pest attacks. Tanalised pressure treated sheds are in hot demand due to both the look of the final product and the protection the treatment affords the structure. Wood treated simply with TANALISED®E will turn a pleasant honey brown colour over time, blending beautifully you’re your surrounding garden. Further painting or staining will not impact the effectiveness of the treatment but does allow for further customisation of your garden building.


Our timber is sent direct by us to be pressure treated. This allows us to add Water Repellent at part 2 which is unique to Ace. No other shed company offers this outstanding treatment.

Timber loaded into treatment vessel. Initial vacuum applied - timber cells evacuated of air. Vacuum held.
Cylinder flooded under vacuum with Tanalith ® E Wood preservative with optional Tanlith ® Extra and Tanatone ® additives.
Hydraulic pressure applied, forcing the preservative deep into the structure of the timber.
Final vacuum extracts excess preservative solution, which is pumped back into storage.
Low pressure inside timber draws in surface solution when vented to atmosphere. Treated timber is left to dry.
Some of our Pressure Treated Sheds