Treatment Selector


	To select the correct preservative treatment for your timber, select the end use in the table below. Choose the recommended treatment and note the PTG Specification code. This can be used to write your specification and will ensure that your timber receive the appropriate protection at our Treatment Centre.

Model Specification Clause:

"The timber as detailed is to be preservative treated to PTG Treatments Specification code (insert specification code from below) and Use Class (insert appropriate Use Class from below).

Following treatment any timbers that have been drilled, crosscut or notched must be treated with a suitable end grain preservative. Timber that has been rip sawn, regularised or planed must be returned to the treatment plant for retreatment. Fence posts must not be pointed following treatment.

Timber end Use	Use Class	Recommended Treatment(s)	PTG Specification Code
Internal building timber, timber frame components, roofing timbers; above DPC	1 or 2	Low pressure High Pressure	PV1 PT1
External Joinery protected with a coating	3	Low pressure	PV3
External cladding, soffits, fascia and barge boards.	3	High Pressure	PT2
Fence rails, decking and pergolas above ground.	3	High Pressure	PT2
Decking and pergolas components in contact with the ground.	4	High Pressure	PT4
Plywood sheathing	1 to 3	Low Pressure High Pressure	PV2 PT3
Fence posts and gravel boards	4	High Pressure	PT4
Sole Plates below DPC	4	High Pressure	PT4
Sole Plates above DPC	2	Low Pressure	PV1
Contact with fresh water	4	High Pressure	PT4
Brown fencing or landscaping timbers	3 to 4	High Pressure Brown	PT6
Retaining wall timbers	3 to 4	High Pressure	PT7