When a project calls for a certain preservation rate, it’s usually for ACQ unless otherwise specified. The grain is wide, dark and prominent. The most common wood used on decks is pressure treated Southern yellow pine. Our latest shed is also a pavilion—and you can build it, too! Use a screwdriver to remove screws and a claw hammer to remove nails. Lisa Wampler began writing professionally in 2005 and has published on various websites. Every treated board carries a label. Lumberyards don’t always carry each type of treated wood at each level of retention. 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Don’t be surprised when you see different treatment levels on pressure treated wood that are supposed to resist rot equally well. Take the board to a lumber yard and compare the wood grain patterns with the wood at the lumber yard. However, the preservation retention is different for another common treatment, called CA-B. Chip away a portion of the paint with a paint scraper in an inconspicuous area of the deck. By the DIY experts of The Family Handyman Magazine. This will expose the wood under the paint. We’ll teach you the types of pressure treated wood. Examine the color of the wood to narrow your choices. The grain is wide, dark and prominent. Western red cedar has a pink hue when fresh but dries to a dark brown over time. If a piece of wood rots or breaks, you want to replace it with the same type. Complete a visual inspection of the wood to determine coloration and grain patterns. The most common wood used on decks is pressure treated Southern yellow pine. Instead, they often carry only ACQ .40. The cost for a .25 ACQ-treated deck board is about the same as for a .40, so some lumberyards and home centers don’t want the hassle of carrying both. She specializes in content writing and search engine optimization, drawing from previous positions as an account manager and a social media manager for an SEO company. The preservative retention for both CCA- and ACQ-treated lumber is .25 for above-ground applications and .40 for ground contact. When you’re buying treated lumber, look at the tag on the end to find out the type of chemical treatment and the preservation retention level. Light wood is usually ash, oak, birch or maple. The numbers depend on the chemical preservative used in the treatment. Use the comparison in Step 1 to help you identify the wood type. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. Step 2. We recommend our users to update the browser. The cost for a .25 ACQ-treated deck board is about the same as for a .40, so some lumberyards and home centers don’t want the hassle of carrying both. When first installed, it has a greenish color but then dries to a dull grey. CCA use has been reduced, so you’re more likely to find ACQ when buying treated lumber. Touch the wood to determine how hard or soft it is. Read the treatment tags carefully to get what you need. Step 3. In most cases, pressured treated pine does will not be painted. Lumberyards don’t always carry each type of treated wood at each level of retention. Determining the type of wood used in your deck will help you when you need to do a repair. Redwood has almost no discernible grain pattern and dries to brown with red hue. When first installed, it has a greenish color but then dries to a dull grey. How to Tell What Kind of Wood I Have on My Deck Step 1. There are many different types of wood that can be used to construct a deck. The amount of chemical treatment needed to preserve wood depends upon the chemicals used. There are many different choices of wood for a wood deck. If you cannot determine the species at the lumber yard, ask a sales representative to help you. In most cases, pressured treated pine does will not be painted. Complete a visual inspection of the wood to determine coloration and grain patterns. Its grain pattern is subdued compared to yellow pine. Joist hangers: Metal fasteners that allow you to fasten the joists in place without notching the ends … Painted wood tends to retain the color it had when freshly cut since the surface of the wood remains protected from the elements. Mahogany is used infrequently in deck construction, and tends to dry with a medium red to a dark brown hue. Check it to find the type of preservative used.