LVL should be preservative treated to ensure it lasts its full service life as it is manufactured from a range of hardwood and softwood timber species. For termite and rot resistance, LVL can be treated to H2 standards. For a lower cost alternative can be manufactured with a bifenthrin glue line additive which provides termite resistance but is only suitable for use south of the tropic of Capricorn.
Structural gradingStructural grading is the process by which timber is sorted into groups - or stress grades - with ideally, similar structural properties in each group. Inevitably there is a very substantial range of properties within a group and significant overlap in properties between the groups