how to build a raised deck

above that point (you may have to cut it with your power saw) so you can screw the ledger tightly against the sheathing and house frame (Fig. 7 shows proper nailing technique and several types of decking. You’ll need to recoat your deck as soon as you notice water drops soaking into the wood rather than “beading” and remaining on the surface. The ends of boards and joints are common trouble spots. Example A fails on both counts, but C and D are good. Beams made from stronger wood can often be smaller. 0n custom projects even the professionals do this. Predrill holes to mid splitting ends. A “beam” is usually the biggest chunk of wood that lies horizontally like a spine under or at the ends of the rib-like spacing row. Four footings are common for a typical deck. Proper flashing stops rot. Continual moisture from ground contact rusts steel and rots wood posts faster, so avoid that situation if you can. Use support blocks to reinforce the ends of a ledger board when bolting it to concrete. Before adding the deck boards, set the posts for your guardrail. Good footing holes have vertical sides or slope inward toward the top. Put scraps in the trash instead. The guardrail feels firm, too, so you can lean against it confidently. Install the ledger first, especially if you have a door opening onto the deck. long to completely penetrate the rim joist. Start gathering inspiration by looking at websites or Pinterest boards to see what may work for your personal aesthetic and backyard layout. Clear, skin-forming finishes like varnish and polyurethane also protect well but don’t last long. Some guardrail post designs might fail some of these tests and still meet technical requirements. Everyone knows how pleasant a deck can be, but as the builder, you get an additional reward — the pleasure of knowing you’ve made a first-class addition to your home. 4). When you dive into your next deck project, plan to stop these enemies right from the start, and you’ll keep your deck healthy for a long, long time. After finding the ledger height, remove the siding to about 1 in. Deck surfaces exposed to direct sun and rain take a terrific beating. But other types of fungus will destroy the wood fiber and weaken your deck’s structure. For example, you’ll need a 2’ x 12’ foot ledger for a 24’ x 14’ deck. The same thing happens when you space your posts farther apart. Basic steps for building a raised deck (the TL;DR version) Foundation. Note any unusual features and potential problems. Generally, steel connectors, available from lumberyards and home centers, are the strongest. Use a level to measure and trim the tops of the posts to ensure that they’re even to create an attractive, symmetrical look to your deck. They also require wider posts, 4x6s or 4x8s, to rest on. Usually 4x4 posts spaced every 6 in. All other material should be at least 2x2 or stronger. Both spread the deck weight over the entire end of the post, and so stress the wood fibers least. D). Then slip aluminum flashing up under the siding and against the sheathing later you’ll bend the flashing over the top of the ledger to keep water from collecting against the house and causing rot. Check the containers to make sure the stain and repellent are compatible. Fortunately, the path from the deck of your imagination to a real one isn’t hard, because there’s nothing complicated about building a quality deck. Other designs, like the one in Fig. The maximum permitted opening in the guardrail varies from 4 in. Decks often fail because their beams aren‘t strong enough. Examples B and C are okay, but their smaller bearing area mean more strain on the wood fibers. A stair run or tread is the part of a stair that you step on. A “.40” rating should be stamped right on the board, which means it contains .40 pounds of preservative per cubic foot of wood. Your first step is to attach a ledger board. Once the concrete has been cured, brace the posts for stability, adding beams or rim joists. Predrill your holes for lead lag shields or expansion bolts with a hammer drill and special carbide drilling bit to make this job easy. Rails that pass over the tops of the posts are strongest and easiest to fasten. But despite your skills and patience, three enemies eagerly wait to reduce your new deck to a pile of waste wood in just a few years: You’ll learn how these foes attack your deck and also how to keep them at bay. Not so easy, but no less important, is to cut a groove for the flashing. Then when the sun bakes them dry, the wood shrinks. Although it’s acceptable, setting the posts directly into the ground (Fig. You’ll see it happen as your deck “weathers” to a silver gray in a few years. Except for very low decks, it’s a good idea to stiffen your posts and beams with diagonal braces to prevent deck swaying (Fig. 3 is strongest, along with the one shown in Fig. Preservative chemicals often won’t penetrate heartwood, so it can quickly rot. You’ve completed the main structural work. There are different sizes for different size lumber. The staff at your local home supply store can share recommendations to help you stay within your allotted budget. wooden dowels, or the diameter of the spacing you desire, into several scrap 2x4 pieces. Lay the three common decking boards — 2x6, 2x4 and 5/4x6 — bark side up for better drainage. Cap the ends of the joists with a band joist (Fig. Just insert 3/8-in. C, simply because they make the deck feel a bit stiffer underfoot and fit better atop 4x4 posts. For recoating ease, your best bet is to apply a clear penetrating sealer or an exterior stain that also seals. (If you’re working more than a few feet off the ground, lifting a heavy beam can be dangerous. If you’re working with a contractor, you’ll want to be able to submit blueprints for the deck to have on file to make sure that your deck conforms to safety regulations, as well as local building codes. Are there enough of them, at least one every 6 ft.? Homeowners can no longer buy powerful commercial preservatives, so this method won’t make your wood as rot resistant as pressure-treated wood. high and so that a 6-in. Use string to outline the raised deck footings. A water repellent simply keeps the water out.). If this is your first DIY project, you might not be attempting an ambitious patterned inlay. In addition, for posts use rot-resistant wood like pressure-treated (a .40-lb. If you’re going the DIY route, several free apps can help you generate blueprints to take to your building office when applying for permits. In general, your deck will feel firmer if you space your posts no more than 6 in. Make sure your posts are perfectly vertical with a level, then bolt on 2x4 or 2x6 braces between the posts and beams at a 45-degree angle. If you’re considering building your own raised deck, it’s best to do your research to formulate a plan to build your deck and get years of enjoyment from it. This will take approximately 48 hours. Your footsteps on the deck boards sound crisp and firm, like the floor in your house. (Wear rubber gloves when you work with preservative to keep it off your skin.). Carriage bolts look neater when the head must be visible, but at times they slip while tightening, so you can’t draw them up firmly. Depending on your deck size, posts may be 4 - 8 feet apart with rail height of 36-42 inches. You will sense it every time you step out on your deck listen. If you prefer to use redwood or cedar, you can make them last longer by treating them with a chemical preservative yourself. Inspect the boards to make sure they’re dry. Go ahead and discuss your ideas in detail. C. I used two 2x8s rather than one in Fig. 3). 2A that make this detail unacceptable: Should you mix your own concrete or buy ready-mixed from a truck? Over time these repeated movements can cause boards to crack and split. Plumb your posts, keeping them straight and then install the landing framing. The calculations are important for the stairs and stringers for them to be within code regulations. Fungus spreads in the form of thousands of microscopic spores that float through the air. Notice the two weaknesses in Fig. Wear goggles to protect your eyes, a dust mask, and gloves. Strength and safety are first priority here. Using bags of concrete you’d purchased when you were gathering your materials, you can premix the concrete using a small cement mixer (that you can rent) or mix the appropriate amount in a wheelbarrow. They’ll review your plan, help size beams and joists, check the railing and generally be a good source of technical information. Fortunately, there’s an easy way to make them smaller without sacrificing the overall strength of your deck. The most damaging weapon nature uses to attack your deck is virtually invisible — rot-causing fungus. 6). The extra effort usually isn’t worth the trouble. The metal post/beam cap shown in Fig. The size you need will depend on the size of your deck. These take longer to dry after the treatment process, so treatment facilities often ship them out before they’re dry.

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