SPEC SHEET No. 19.2 H3 VENEER TREATED LVL February 2026
ALL LVL USED IN EXPOSED APPLICATIONS SUCH AS DECK BEARERS & JOISTS MUST BE H3 TREATED & SEALED Laminated Veneer Lumber (LVL) products must only be used in exposed applications where wetting is periodic and can dry efficiently. Metsa Kerto LVL and ITI Spec Frame LVL must not be used in exposed structural applications where the installed LVL can not be regularly inspected for signs of moisture damage.
Internal, Fully Protected
300
Care is to be taken to avoid situations where water can pool or become trapped between the LVL and its supports or joints. Coating System
Recommendation
Clear penetrating
Apply as per manufacturer’s
water repellent oils
directions. May require frequent
and sealants Semi-transparent to
re-application (6–12 months).
full colour penetrating External, Above Ground, Unprotected
External, Above Ground, Fully Protected
Exposure Internal, Fully Protected External, Above Ground, Fully Protected External, Above Ground, Mostly Protected External, Above Ground, Unprotected
External, Above Ground, Mostly Protected
exterior timber stains
manufacturer’s directions. Apply a good quality, long oil
Requirements Additional Treatment required for Termites & Insects only Additional Treatment required for Termites & Insects. If adequate ground clearance is not available products should be treated as if they are External, Above Ground, Mostly Protected. H3 Treatment required in additional to being installed per the below guidelines H3 Treatment required in additional to being installed per the below guidelines
Apply 2 to 3 coats as per
based exterior wood primer Solid colour exterior acrylic paints
followed by two coats of premium quality exterior acrylic paint according to the manufacturer’s recommendations.
Solid colour exterior gloss enamel Clear or semitransparent exterior
Not recommended. Not recommended.
gloss or varnish
INSTALLATION REQUIEMENTS OF H3 TREATED LVL PRODUCTS: 1. The builder / end user is to retain the Treatment End Tags as evidence of treatment type and provider. 2. All edges and faces of members are to be painted / sealed prior to installation using an acceptable coating method, such as an acrylic system, using the manufacturers installation requirements. 3. 4. 5. 6. 7.
Always install a protective barrier to the top edge and exposed ends of all LVL’s in exposed applications using either tesa JoistSeal, a malthoid type barrier flashing or similar. Treatment chemical providers stipulate the LVL should be left for a minimum of 7 days after treating and wiped clean of dust, dirt, grease and any other residues before painting. Coating systems are to be regularly maintained in accordance with the manufacture’s requirements. Refer to AS1684.2 Appendix B for additional information on Timber Durability. ITI offer alternative products which are specifically developed for use in high moisture and exposed applications. Please discuss alternative options with your timber supplier if you feel the above requirements are not practical for your intended application.
Failure to install H3 Treated Spec FRAME OR SPEC BEAM LVL in accordance with the recommendations above will result in a retraction of liability by ITI towardS the product and associated treatments Timber Decking tesa JoistSeal, or similar, wrapped over the top and exposed ends of the joists Joists
Bearer
tesa JoistSeal, or similar, wrapped over the top and exposed ends of the Bearer
SPECFRAME 10.0GREEN
SPE SP ECBEAM13.2 13.2GREEN