The TANALISED pressure treated UC4/HC4 Range of fencing timbers from PM Dickson Timber, when used in accordance with the appropriate standards and in the relevant Use Class situation, has a 15 year guarantee against failure of the timber from fungal decay or insect attack.

Non Incised Timbers

The guarantee is for the re-supply by PM Dickson Timber, of a component that is proven to have failed as a result of fungal decay or insect attack within 15 years of supply.

It does not cover the costs of removal or reinstatement of such components or consequential costs or loss due to failure of the component. Claims must be brought within two weeks of the expiry of the 15 year period, at the latest.

The term ‘fungal decay’ as used in the guarantee refers to wood destroying fungi that feed on and degenerate the wood cell walls.

It excludes staining and mould fungi associated with the weathering of wood.

Shakes, cracks, bending and twisting is natural and is not covered by this guarantee

The term ‘insect attack’ refers to attack by wood digesting insects that destroy the timber structure.

The term ‘failed’ refers to damage caused by insects and/or fungi to such an extent that the component is no longer fit for purpose.

Nothing in this guarantee affects the statutory rights of consumers, or excludes or restricts the liability of PM Dickson Timber for death or personal injury caused by negligence, or for fraudulent misrepresentation.

Incised Timbers

Purchase of Incised timber supplied by PM Dickson Timber Ltd must be registered for the warranty to apply, please follow link to warranty page



1. Only UC4/HC4 Fence Posts, Gate Posts, Sleepers and Gravel Boards must be used in ground contact situations

2. Should the UC4/HC4 pressure treated fencing timbers be cross cut, notched or bored during installation, then

    exposed surfaces are to be liberally brushed with end grain wood preservative to the directions shown on the product label.

3. Fence posts must not be pointed after treatment.

4. The shortening of fence posts should be avoided, if possible, but in any event the cut end must be treated with end grain preservative and must never be used in ground contact.


1. Any pressure treated fencing timbers removed from their original installation and re-used at a new location.