Vacuum Pressure Impregnated - Kiln Dried After Treatment (KDAT) Lumber, Plywood, Timber, Shake Shingles, Architectural Millwork, Specialty Treatments

VACUUM PRESSURE IMPREGNATION SPECIFICATIONS

Plywood is loaded into a treatment cylinder. The door is sealed and a vacuum is applied. During this stage, most of the moisture and the air is removed from the wood cells. The vacuum in the cylinder causes the cylinder to fill with Flame Safe's proprietary Fire Retardant. Pressure is raised in the cylinder forcing the fire retardant solution into the wood. The pressure and times varies depending on the species of the wood, the commodity being treated, the cross sectional area, and the amount of the Fire Retardant solution to be impregnated into the wood. The pressure in the cylinder forces the remaining fire retardant solution to flow back into a holding tank. Another vacuum is applied, removing the excess fire retardant solution from the wood. The lumber, plywood or timber is loaded onto a tram that services a gas fired forced air kiln.

KILN DRYING AFTER TREATMENT-SPECIFICATIONS

Heated air is used to extract moisture from the wood. A gas fired forced air convection system removes most of the moisture from the wood after treatment. The moisture laden air is dehumidified. The drying rate is monitored to prevent cracking in the lumber. Plywood is kiln dried to a moisture content not to exceed 15%. . Pitch in the wood is crystallized permitting interior and exterior finishes to be easily applied. When kiln dried, Flame Safe fire retardant treated wood becomes lighter and stronger, maximizing it's structural uses.