Low Pressure preservatives provide long term protection against wood destroying fungi and insects and are widely used in timber frame construction, roofing timbers and other lower hazard end use situations (further information on Use Classes).

Their key advantages are lower uptakes of water during treatment and a more natural colour compared with the green high pressure treatments. The waterbased preservative solution is applied to the timber in purpose designed industrial plants using a vacuums during the process. This provides an 'envelope' of protection and leaves the core of the timber untreated and dry. The low uptake of water as a result of the process quickly evaporates leaving the treated timber at it's original dimensions and moisture content.

To select the correct specification please use the table below or download our Guide to Low Pressure Treatment (PDF)

Treatment Code	Use Class	Typical Components
PV1	1 or 2	Internal building timbers, timber frame material, roofing timbers, TR26.
PV2	1 to 3	Plywood and other suitable sheet materials
PV3	3	Joinery or timbers used externally above ground and protected by a suitable surface coating

Desired Service Life for Protim treated timber:
Components Used in Use Class 1 or 2 60 Years
Components Used in Use Class 3 15 - 30 Years

Further information:
Low Pressure Treatment Specification Guide (PDF)
Low Pressure Treated Timber User Guide (PDF)