Tempered hardboard, or high-density fiberboard, is an engineered wood board that, unlike particleboard, is made with ground-up wood fibers rather than wood chips and held together with resins. Tempered hardboard is the preferred choice for exterior projects because it is strengthened through a process of pressurizing and heating, and chemically treated with a thin layer of linseed oil or other drying agent used as a sealant.

Tempered hardboard is rigid and yet bendable, with greater surface hardness and tensile strength. It is also more water-resistant than hardboard and holds up in harsh weather conditions, making it the preferred choice for exterior use.

TEMPERED HARDBOARD
PANEL PRODUCTS

• 1/8” 4X8 SMOOTH 2 SIDES (2412)
• 1/4″ 4X8 SMOOTH 2 SIDES (2425)
• 1/4″ 4X10 SMOOTH 2 SIDES (2430)
• 1/4″ 4X8 PEGBOARD WHITE 1 SIDE (2427)