Tempered hardboard is the only grade of hardboard that is suitable for exterior applications because it has a higher density of wood fibers and is treated with a water-resistant resin. This makes it more durable and resistant to moisture than other grades of hardboard.
The density of hardboard is measured in pounds per cubic foot (pcf). Tempered hardboard typically has a density of 45-55 pcf, while standard hardboard has a density of 35-45 pcf. The higher density of tempered hardboard makes it more resistant to bending and warping, which is important for exterior applications.
The water-resistant resin that is used to treat tempered hardboard is typically a type of phenolic resin. Phenolic resins are very resistant to moisture and chemicals, making them ideal for use in exterior applications.
In addition to its high density and water-resistant resin, tempered hardboard also has a smooth surface that makes it easy to paint or stain. This makes it a versatile material that can be used for a variety of exterior applications.
Here are some of the benefits of using tempered hardboard in exterior applications:
* Durability: Tempered hardboard is more durable than other grades of hardboard, making it a good choice for applications that are exposed to the elements.
* Moisture resistance: Tempered hardboard is treated with a water-resistant resin, making it resistant to moisture damage.
* Smooth surface: Tempered hardboard has a smooth surface that makes it easy to paint or stain.
* Versatility: Tempered hardboard can be used for a variety of exterior applications, including siding, soffits, and fencing.
If you are looking for a durable and moisture-resistant material for your exterior applications, tempered hardboard is a good option.