The purpose of an expansion joint is to allow the concrete slab to expand and contract with temperatures changes, without cracking the slab. During the pandemic, the Spada family has been busy renovating an old building on First Street. They put a base of rocks and then used wire mesh before they poured the new concrete. No special technique is required. The options are: Replace the wood with wood; Use a Joint Sealer; With either option, try and pick a time of the year when it is colder. The Willamette Valley of Oregon has a reputation for the red wine, but there are other success stories in the area. Because you live in the Oakland hills, you have clay soil. And that’s all there is to it. © 2020, Everett Herald and Sound Publishing, Inc. 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This is a repair that is relatively inexpensive, and although somewhat time-consuming, fairly easy. Two common nail options are shown below: the cut nail and the concrete nail. Simple physics holds it all in place. By Robin Hewitt Transition strips are used to finish hardwood and laminate floor edges where the product meets an existing floor in a doorway, and are typically cut to fit and then nailed in place or snapped into a track that has been screwed to the floor. Can I use the grinder to create a joint and follow these directions. Everett Bible Baptist Church hosts Trees of Christmas, with music, narration and special treats for the family. Wood dividers in a concrete sidewalk, driveway or patio aren't just decorative; they serve an important function. All the wood materials that are going to be behind the concrete should be pressure treated lumber and properly flashed behind the concrete with metal flashings that will last “forever.” These metal flashings should be over a foundation grade rubber membrane. Once a divider has rotted enough to need replacement the nails are probably rusted and rotted away as well. As the wood is driven into the concrete cavity the sides of the strip adjacent to the concrete are torn upward. SlabGasket is the perfect and cost effective replacement solution for rotten or missing wood. Purchase foam backer rod that is about 1/8 inch wider than the average width, ensuring a tight fit. Installing a hardwood floor over a concrete slab. Your … Once the material is dry, the more elastic wood strips compress as the concrete expands and contract with the temperature changes. after concrete’s initial cure when it is expelling it’s water content (and shrinking), it then acts like a sponge and absorbs moisture. To make the wood dividers last as long as possible, be sure to rub a couple of coats of clear wood preservative onto all six sides of every strip. Use isolation joints between slabs and columns, walls and footings and where curbs or sidewalks meet other concrete structures. Use side-cutter pliers or wire cutters to clip off any portions of nails that have not yet rusted away. Verify that the backer strips and sealant you purchase are compatible materials. 6 in. As the wood is driven into the concrete cavity the sides of the strip adjacent to the concrete are torn upward. Inserting new wood strips is difficult and time-consuming, but deteriorated dividers can be removed and replaced with an epoxy-based sealant. Proper installations include the use … You’ll need a hammer, a wood chisel and a hand saw, maybe a pair of side-cutters, a small vacuum and an electric sander or an electric planer or a small table saw (these can be rented) and a small block of soft scrap wood about 12 inches long. Your problem is … Shop Trim-A-Slab 1.25-in x 0.75-in x 25-ft three quarter-in Grey 25 foot Polyvinyl Concrete Expansion Joints in the Concrete Expansion Joints department at Lowe's.com. A: Howard Brickman responds: Concrete is a good substrate for installing wood flooring if proper precautions are taken to ensure that excessive moisture conditions are detected prior to installation,and controlled during the life of the floor. The singer best known for “Christmas (Baby Please Come Home)” will perform her annual holiday concert online this year. The listings include Historic Everett Theatre, Edmonds Center for the Arts and Thumbnail Theater shows. Large Sample Concrete Expansion Joint Pack Trim-A-Slab is a product made from exterior-grade Trim-A-Slab is a product made from exterior-grade materials designed to replace rotten or missing wood often found in driveways and sidewalks over 5-years old. Clean any remaining wood chips, soil and concrete debris that remain in the gap with a shop vacuum or other vacuum cleaner. If you were present when your patio was being poured, you may have noticed that there were evenly spaced rows of nails partially driven into both sides of the wood dividers. Expansion joints should be the first joints planned and installed fo… He used 4000 PSI concrete that is 4 inches thick and every 10 feet or so he used 2x4 pressure treated wood as the control/expansion joints. You might assume that once you have removed the old wood from the concrete there won’t be anything to hold the new wood in place. Purchase some redwood or other fine-grained lumber like teak that's naturally resistant to rot. Checkerboard construction is not recommended. Next, vacuum the cavity to remove scraps of wood, concrete and small debris. An excellent groundcover plant, this variety forms a flat, dense carpet of glossy chartreuse leaves. Visit here to know more about products or call us at 832-618-3726. Concrete expands and contracts depending on the temperature so using a hard substance will cause further cracking, expansion joints are critical between slabs. The easiest approach is simply to nail the wood to the concrete. Because drying shrinkage takes place over a long period, lengthy delays would be required between casting of adjacent bays to gain much benefit from checkerboarding. The cut nail has a square, tapered shape with a square tip. Concrete slab floors do require that all subgrade utility rough ins be completed before the slab is poured and be accurately located. SlabGasket is… Designed to replace rotten or missing wood expansion joints in driveways, walkways, patios, and pool decks. The joints allow each section to move independently -- both vertically and horizontally -- as the concrete freezes and thaws, or undergoes soil shifting and other movement. I must say, you are lucky to lack a basement, it has just been a depository for junk in my case. Do the same for the gaps between the concrete slabs, but stop filling the gaps about 2 inches from the top of the slabs. Expansion joints are cuts in concrete slabs, or the joints between walls and concrete slabs, that go completely through the slab to the base material. Measure the width of the gap at several spots with a ruler or tape measure. It is recommended to have concrete joints along column lines, either sawed or keyed. it is better to require some sort of phsyical barrier between concrete and wood (treated or not treated). If green wood is used (green referring to moisture content, not color), it will shrink as it dries out and in very short order, two to three months, it will be loose and in need of replacement. When it comes to expansion joint repair Trim-A-Slab has the best products available. On the House: Restoring Concrete Patio Dividers, Home Repair Tutor: Concrete Expansion Joints: Keep them Watertight and Crack Resistant, Inspectapedia: How to Seal Cracks in Concrete Floors & Walls, Transitioning From Laminate Flooring to Linoleum, How to Fix the Threshold From Laminate to Carpet. Use the electric sander (or an electric planer or a small table saw) to mill the replacement dividers so they are approximately 1/16 to 3/32 of an inch wider than the average width of the divider cavity. Don’t worry about the nails though. This helps prevent cracks and buckling. Metal dowels should be used in slabs that carry heavy loads. Trim-A-Slab is a replacement for rotted and old wood typically found between slabs in driveways and sidewalks. © Copyright 2020 Hearst Communications, Inc. Just get the wood out as best you can. The new wood strips are held by the irregular shape of the recess in the concrete. Once in place the dividers will be fully protected. Between the compression created by … Not just clear, but clear and dry. Calculate an average width. Wear eye protection while removing the old strips. It offers many advantages over the tube-dispensed gooey stuff that has been about the only option available for years. The pieces of wood between your concrete slabs are expansion joints. This area is typically shored and reformed after the primary forming has been removed. Do the same for the gaps between the concrete slabs, but stop filling the gaps about 2 inches from the top of the slabs. Cut nail Nails. The dividers are put in place when the concrete is wet. If the gap is wider than your backing rod, you can braid multiple strands to make a thicker "rope.". Follow the manufacturer's instructions regarding the necessary curing time for the sealant before walking or driving across the fresh epoxy. Snohomish County PUD shares five smart ways to find joy in the season that use less electricity. Even if your home was built on a concrete slab, you can still enjoy the beauty and charm of hardwood floors. Experienced professionals pay close attention to managing moisture and minimizing wood floor expansion and contraction when preparing to install hardwood floors on concrete slabs. The "expansion joints" are there to keep the concrete slabs from breaking when they expand from warmer weather and push against each other. Again, if the wood is rotten enough to need replacement, there probably won’t be any nails. Used in residential, commercial, and institutional applications. SlabGasket is produced in 50′ rolls, and is sold by the foot. Glue alone will secure furring to concrete walls, but it's typically not sufficient in most instances. First, use the hammer and chisel to remove the old wood strips. Cut the foam backer rod to length with scissors. Once the old wood is out, use the side-cutters to shorten any nails that may remain in the concrete. Every year or two pour oil onto the divider strip and let it trickle down the sides and ends. Press strips of backer rod into the gap and force them down with a putty knife or thin scrap of wood. Subterraneans that find the gap between the floor slab and wall encounter the bottom of a tasty wood baseboard, and also the thin vertical strips that run up the wall from the floor to the ceiling behind the drywall, called furring strips. Wood dividers in a concrete sidewalk, driveway or patio aren't just decorative; they serve an important function. The listings include Edmonds Center for the Arts, Historic Everett Theatre and Whidbey Island Center for the Arts showings. If the dividers are original, there may have been nails driven through the dividers to hold them more securely. Not so. While I rarely have to install a wood strip floor on concrete here in the North East, a lot of you have houses built with a concrete slab as a subfloor. The spacers helped break up the concrete into smaller slabs that were less likely to crack. While this method often ensures that the concrete will last for many years, … Fill the gap with backer rod until it is within 1/4 to 1/2 inch of the top of the space. Clay expands when it gets wet and shrinks when it dries. thanks. They are typically strips of bituminous felt, but can also be made of wood, cork, rubber or plastic foam. The typical/conventional pour strip which is a leave-out of 8 to 4 feet with the post tension concrete slabs stopping at each side of the leave-out and reinforcing bars running from the initial pour into the leave-out and bars from the second pour running to the face of the initial pour. Air, dirt, asphalt soaked fiberboard, or wood, all will do the same thing: Give the concrete a place to expand TO. I just had a contractor install a new concrete patio and driveway and it looks like they did a good job. A slab on grade subfloor presents a lot of concerns when trying to install some types of wood floor. There is a crack between the step and slab. Follow this process and your new replacement dividers will outlast the originals. The nails are used to “key” into the concrete to hold the dividers in place. Put on work gloves. Expansion joints, also known as isolation joints, completely separate two sections of concrete slab. During divider replacement the nail keying technique cannot be used. Try to accomplish most of these chores, but don’t beat yourself up if you can’t get them all done. Q: What is the best way to install a wood floor over a concrete slab?. Even when the concrete is in excellent condition, it's hard to make an acceptable-looking repair. For tips from James and Morris Carey, visit their Web site at www.onthehouse.com or call the listener hotline at 800-737-2474. The listings include museum exhibitions, gallery shows, fairs and festivals and calls for artists. When our concrete steps were poured a few years ago, the contractor did not put an expandable joint between the bottom step and the concrete sidewalk slab. most commercial specs for building forbid non-treated wood in direct contact with concrete. This wood was used during the slab construction, and is part of the ‘formwork’ used to define the size and shape of the slab. Kelvin O'Donahue has been writing since 1979, with work published in the "Arizona Geological Society Digest" and "Bulletin of the American Association of Petroleum Geologists," as well as online. Wipe off the excess to prevent a sticky mess. Cut the strips of wood to fit each of the gaps making sure the shape of the strips is wider at the top than at the bottom. If your concrete patio is in good condition except for gray, tattered and splintering wood dividers then wood replacement may be in order. The listings include zoos, aquariums, museums, ice-skating rinks, shows and special walks. Fill the remaining gap using a self-leveling epoxy sealant and a caulking gun. Between the compression created by installing a slightly oversized piece of wood and the upward angle of the torn sides of the wood you’ll have a tight fit. Home and garden events and resources around Snohomish County. Thank you for your information on the concrete gasket, I have been trying different products and it is always very difficult to replace the expansion joints on the concrete because normally they are different in size and wood or other products requiere a lot of work. When wood dividers deteriorate, the gaps collect soil, allowing plant growth that can damage the concrete. The following is a breakdown of the pros and cons of four versatile fasteners most often used for attaching wood to concrete. Trying Concrete Screws Select concrete screws based on the length of the intended hole. Retrofits for plumbing or mechanical changes later can be difficult and costly. Trim-A-Slab is a product made from exterior-grade materials designed to replace rotten or missing wood often found in driveways and sidewalks over 5 years old. The Careys are also on KRKO (1300-AM) from 6 to 10 a.m. every Saturday. We don’t want hammer marks on our brand new divider strip now, do we? QUIKRETE® Expansion Joint Strips (No. You might consider using knee pads for comfort. Furring Strips Furring is wood strips attached to a concrete wall and used as a base for nailing up wall coverings, such as drywall. Don’t cut them completely away. Plan exact locations of all joints, including the timing of saw cutting. Try not to dull the chisel by driving the sharpened end into the concrete. In warm, humid areas, however, even decay-resistant wood that's been sealed may rot. Wooden spacers were commonly used as control joints for concrete driveways. Wood divider replacement is rather easy. Cut the wood to length, and starting at one end begin driving the strip into the crevice using a wood block between the divider strip and the hammer. Leave about a quarter-inch of the nail sticking out of the concrete. O'Donahue holds a Master of Science in geology from the University of Arizona, and has worked in the oil industry since 1982. The American Concrete Institute's Guide for Concrete Floor and Slab Construction (ACI 302.1R-89) recommends using long-strip construction. Oh, and don’t forget eye protection. 6917) are made from resilient wood fibers to prevent damage during expansion and contraction of concrete. Clear, dry redwood should be used. The dividers are put in place when the concrete is wet. 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