What are the different grades of treated lumber?

What are the different grades of treated lumber?

There are many types of treated lumber. There are three main families of treated lumber used in construction: Borate, Alkaline Copper Quat (ACQ) and other rot-resistant treatments, and non-combustible (Non-Com).

Are there grades of pressure treated wood?

Pressure-treated lumber grades are assigned based on appearance. Boards with fewer knots or other cosmetic blemishes get a higher grade, but a premium grade comes with a higher price. Use #2-grade lumber when appearance is not crucial to your project.

Is CCA better than ACQ?

While both ACQ and CA are effective preservatives, they are also more corrosive than CCA. Briefly, copper eats steel and aluminum for lunch, and one of the benefits of the now-missing arsenic and chromium was that they made the copper less corrosive.

How long does Wolmanized wood last?

Pressure treated wood can last for up to forty years or more. Precisely how long it will last depends on the chemicals used in the pressure treatment, the project type, the wear and tear the wood will endure, the species of wood, the amount of exposure to harsh wet environments and how well it is maintained.

What is the difference between standard and premium pressure treated wood?

Premium – Highest grade for ¾ radius edge decking. Standard – Mid-range grade for 5/4 decking. Number 2 – Grain slope must meet minimum 1/8 grain slope. Boards will contain no splits larger than 1.5 times width of board.

Why was CCA banned?

In 2001, the U.S. Consumer Product Safety Commission (CPSC) and the EPA received several petitions to ban CCA use in playground equipment because of potential human health concerns about exposure to chemical residues from contact with the wood and surrounding soil.

Is CCA treated wood safe for vegetable gardens?

Older treated pine (called CCA treated pine) is preserved with copper and chrome arsenate (containing arsenic) and studies have shown low levels of these chemicals can leach into the soil and have been found in some root vegetables. This makes it perfect to use for home vegetable gardens.

Is YellaWood better than other treated lumber?

Outdoor exposure testing also shows that wood treated with micronized copper, like YellaWood products, offers superior benefits compared to other copper-based products, so builders know they’re working with high-quality materials their clients can depend on.

Can YellaWood be painted?

When can I paint or stain my project? If you want to paint your project, use an oil-based primer and a high-quality acrylic (latex) paint. If you want a stained look, a high-quality oil-based stain is recommended.

How long does CCA treated wood last?

As a whole, the post and lumber specimens indicate an expected durability of over 50 years for creosote-treated wood and over 60 years for wood treated with pentachlorophenol, copper naphthenate, ACZA, or CCA.