How our 15 year timber guarantee treatment works

All our 15 year ground contact guaranteed timbers are UC4 treated, e.g. Fence posts, decking joists, retaining walls.
 

Redwood timber
We only use redwood timber, this allows treatment penetration to the heart of the timber. This provides protection of sapwood even when timber opens up. Whitewood timber resists penetration of the treatment chemical. At best only 6mm can be obtained. Even small splits will breach protective barrier and allow fungal and insect attack.
 

Dried to 28% moisture
All redwood posts in ground contact are dried to 28% moisture content or less, allowing deep penetration of the treatment solution.
 

Korasit market leading solution
The main element of any treatment is the treatment solution itself. We ensure our redwood posts are treated by the Korasit solution, the most effective treatment on the market at present.
 

Air layered drying
By spacing each layer when drying, air is able to circulate through the pack. Not only does this prevent fungal growth staining the timber, it reduces drying times and allows treatment solution to fully penetrate each individual post in the pack.
 

Posts identity stamped
Each guaranteed post is stamped with an identifying mark. In the unlikely event of one of our posts failing during the 15 year guarantee period, our customers are able to trace where and when the post was purchased. Previously it has been difficult to prove the origin of any defective post.
 

Although there is a price premium for the 15 year guaranteed ground contact timber it does provide the customer with peace of mind that their investment will be protected for this period.

 

Redwood allows treatment
Reddwood allows 15 year treatment UC4
 
Packs are dried to 28% moisture
Redwood posts dried to 28%
Air layers allow treatment solutions to fully penetrate each post in the pack
Air layer to dry UC4 Korasit
 
Each post identity stamped
UC4 identitiy stamp