The difference is about what you don’t see.

PWT Treated™ means longer spans with better views, longer lasting, and a longer warranty

At Pacific Woodtech we’re driven by making the best even better, which is what we’ve done with our newest, boldest product – PWT Treated. We now exclusively offer the world’s first manufacturer-treated LVL – and an exciting new era in engineered decking solutions.

Longer spans means fewer columns, footings and piers

The outdoor living trend is growing so we’ve been working behind the scenes to bring to market a treated wood that meets construction needs; consumer demands and far exceeds other products in longevity, durability and versatility. While some hardwood and composite decking might last for 25 years or more, many deck substructures can show signs of degradation before year 20. PWT Treated goes far beyond that, with a life expectancy of over 50 years.

So, how do we do it? We use a proprietary treatment system and process that utilizes TRU-CORE® Technology to fully penetrate each veneer layer, and then add an envelope finish, offering complete protection from the inside out. Traditional methods only allow for the outer layers to receive treatment. Our EWP is treated through and through, safeguarding against damage caused by fungal rot, decay and wood-destroying insects, including Formosan termites.

TRU-CORE® Technology fully penetrates each veneer layer, plus an envelope finish

Like everything we make, PWT Treated is engineered for strength and stability, while still being remarkably easy to work with. Uniform moisture content is a given – the size will stay proportionate. This EWP will not bow or twist – removing the need for crowning joists. Longer spans mean fewer columns, footings and piers – and more panoramic views in your wide-open, under-deck living space.

You’ll find no lumber envy here. PWT Treated can be used in a variety of settings and situations, including severe, critical and hard-to-replace above ground areas such as deck substructures, exterior columns and sill plates. And of course, it’s stainable. Seamlessly integrate strength, consistency and dependability into your structure.

Rest assured with our service promise in mind. Every piece of PWT Treated is engineered in our state-of-the-art manufacturing facility with the highest industry-quality, most efficient process, and helmed by our seasoned production teams. It’s built to last – a promise we take seriously with our transferable 25-year warranty. And every piece we sell comes with Pacific Woodtech’s unrivaled customer service.

Put Pacific Woodtech’s 20+ years of renowned industry excellence to work for you. Contact us directly at 888-707-2285 or click below for more downloadable information:
Features and Benefits


Pacific Woodtech has teamed up with Kop-Coat to create the only commercially available fully treated LVL. Called “TRU-CORE® technology,” this process was developed to move treatment chemicals through wood; the migration process is accelerated when energy, such as heat from an LVL press, is added.

The difference is that traditional processes use VOCs and/or incising to drive treatment into only the outer 0.4” perimeter of a wood member, while the patented TRU-CORE® technology can drive treatment into the entire member (no gradient) without adding regulated mineral solvents or water-based drivers, which can affect strength and/or void warranties in engineered wood products.

PWT Treated LVL can be used in severe above-ground UC3B applications requiring UC4A treatment retentions per AWPA, including severe, critical and hard-to-replace above-ground uses.

Any above-ground interior or exterior use such as deck beams, deck joists, deck columns (when on piers of 8” or greater in height, with a 1” offset). It is also a great product for treated sill plates, when used with a foam gasket for separation from the concrete, which is required by code. PWT Treated LVL should not be used in “ground contact.”

Douglas-fir is a “refractory species,” which means it has different anatomical properties, such as pore size and structure, making traditional treating processes difficult. However, when you look at the physiology of dry Douglas-fir, you will see that with some modern technology, it can be treated quite easily.

Kop-Coat’s TRU-CORE® technology offers full penetration of Douglas-fir using modern preservatives. See ESR-3834 for additional details.

Many western species are considered refractory species.

No, the treatment continues to normalize for about 24 hours after the LVL is pressed. After that time, the process has stabilized within the product.

Kop-Coat developed the technology, which has been patented for over 20 years. To date, there are over 90 commercial wood treatment penetration programs across the globe.

Other companies have tried to develop similar penetration technologies but have failed.

All organic molecules degrade over time – regardless of treatment process. The ones selected for TRU-CORE® technology retain their strength for 30 to 60 years in use – this is a significant improvement over traditional treatment processes where only the outer layer of wood fiber is treated.

The LVL will also be stamped/marked “PWT TREATED” and will have a muted olive colored sealer that is different than the standard Pacific Woodtech “honey brown” sealer on untreated LVL.

There are no solvents or VOCs in the treatment, so the genuine smell of wood is retained.

Yes, the active chemicals used in the treatment process are below EPA levels for indoor use.

Yes, it is posted on our website.

The risks associated with touching/handling PWT Treated LVL are no worse than those of untreated LVL.

Always wear proper PPE per the SDS or Tech Sheet.

Wear work gloves or wash hands after touching and before eating or using the restroom.

– Do not handle until all safety precautions have been read and understood

– Wear protective gloves/protective clothing/eye protection/face protection

– Wash face, hands and any exposed skin thoroughly after handling
– Avoid breathing dust/fumes/gas/mist/vapors/spray
– In case of inadequate ventilation, wear respiratory protection

– Contaminated work clothing should not be allowed out of the workplace

– Use only outdoors or in a well-ventilated area.
Taken from treated LVL SDS. Same as untreated LVL.

The hazards are no worse than those of untreated LVL.

Per the SDS…

IngestionNot an expected route of exposure. Rinse mouth. Immediate medical attention is not required.

No, since PW Treated LVL is treated throughout the piece (no gradient), re-treatment is not necessary. However, it is recommended to recoat cuts with a sealer or paint to minimize swelling, as moisture will wick into end-grain fibers more quickly than edges and faces.

Yes, PWT Treated LVL can be stained or painted.

Flashing is required over ledger boards to meet code. Flashing is also required on all upward horizontal faces of PWT Treated LVL to meet the warranty. PWT recommends flashing tape at a minimum.

Drainage systems that cover PWT Treated LVL joists and beams, preventing wetting from occurring, are acceptable substitutions for flashing on the joists and beams.

Cladding is allowed if it will not trap moisture, as this will reduce the performance and life expectancy of even treated wood products.

PWT Treated LVL can be disposed of in the same manner as untreated LVL.

ACQ, CA, and MCA are chemicals used for post-manufacture, pressure treating of wood products. PWT Treated uses a PTI based system. PTI is very common. It has been around for over 20 years, mainly used in the window and door industry. PTI stands for Propiconazole (fungicide), Tebuconazole (fungicide), and Imidacloprid (Insecticide). Our PWT Treated LVL has twice the PTI retentions required for UC3B, with no gradient that you would see in pressure treated lumber.