Concrete block, also known as cinder block, has been a staple of building materials for years. How to remove and replace a concrete block from a wall depends on the type of block involved. If this is your first time, plan the task out with a friend. ... Cut Cinder Block. I have done this using a piece of 3/4" plywood with a 24" hole cut as a guide. Masonry Specialist & Founder, GO Masonry LLC. Cutting concrete blocks can be done a few different ways. It will be challenging to make the bottom of the groove smooth; patience and careful chiseling will be required. Advertisement. Step 2 Turn the block over and make an identical guiding line. Score the block along all the layout lines by placing a chisel on the line and striking it with a hammer. Expert Interview. ", Unlock expert answers by supporting wikiHow, https://www.improvenet.com/r/costs-and-prices/cement-slabs, https://www.familyhandyman.com/masonry/how-to-cut-concrete/view-all, https://www.youtube.com/watch?v=zUrY7Iqu3zs, https://www.thisoldhouse.com/how-to/circular-saw-101-how-to-adjust-blade-depth, https://www.bobvila.com/articles/how-to-cut-concrete/, consider supporting our work with a contribution to wikiHow. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Equip either saw with a masonry or diamond blade. Gerber has over four years of experience running GO Masonry and over ten years of general masonry work experience. To help you accurately adjust the depth, place the saw onto a long piece of wood as thick as the desired depth. Diamond-blade wet saws make a great choice when cutting through thinner -- 3-inches thick or less -- concrete blocks, but thicker blocks will not fit under the blade. Or, you may find either utility's starting point and run them up into and through the ceiling and walls to the new location. Korpella's work has appeared in a variety of publications. Start at the top of the opening and cut carefully along the lines you made on the wall. Abrasive blades are less expensive than diamond-coated blades, but they wear out much quicker. For cutting concrete blocks, you can either use a skill saw with a masonry blade or a masonry saw. The best option is a larger-than-average circular saw with a diamond blade. To save time, distribute the blocks along the job site with all the wide sides up. To cut concrete with a 15-amp circular saw, start by using chalk to mark cut lines on the surface of the slab. Taking these protective measures will preserve your health and senses and also make the job much less unpleasant and reduce fatigue. Concrete blocks can be basic and functional or pretty & decorative. Concrete block webs are wider on one side. In addition, an efficient and close-fitting dust mask (respirator) is required because cement dust is harmful if inhaled. Any concrete deeper than 6 inches (15 cm) should be performed by a professional with equipment that can handle deeper concrete. Place the concrete block on the platform beneath the cutting blade, and arrange the block so that the blade will slice it where you want the cut made. If you freehand your line with chalk, make sure to make it as thick as possible. Cut the block, allowing the saw and blade to do most of the work — don't apply too much force. Also. This article was co-authored by Gerber Ortiz-Vega. Trace along the straight edge with a piece of chalk to make the center dividing line. If you're thinking of cutting concrete for projects like sidewalks, patios, and basement walls, the proper tools and a bit of effort can save you from spending money on a contractor. I ask this, because it would end up being a pretty long rent time. You can also use it to cut through brick and granite. Choose a special masonry saw blade or a diamond blade when cutting through concrete blocks. A block splitter is another type of tool that you could use in order to cut concrete. Line up the blade of a concrete saw over the marks on one side of the wall. Blocks are stacked one upon the other to form everything from exterior walls to retaining walls. How do I cut grooves in concrete slab for water drainage from rain? The method you choose depends on how rough or how smooth you wish the cut to be and on what tools you have at your disposal. Get a friend to hold one end while you hold the other and run the line over the region to be cut. How do I cut a 24 inch by 24 inch by 4 inch thick section of concrete by my pool in order to find a leak? Buy concrete from home hardware stores or local independent concrete suppliers. Step 3 Flip the block so the chalk line faces away from you and the block stands on edge. By using our site, you agree to our. Poured concrete footings for walls should be twice the width of the wall, flush with the ground, and as deep as local codes require. You don't, you remove and re-pour one of the slabs to match whichever slab you like most. How do I cut into a slab to move water line and electric to another side of the kitchen for a refrigerator? A power saw produces a cleaner, more even cut than does chiseling. Use blue and white chalk if you want the lines to last about 1 week. Next, proper safety guidelines and equipment are discussed. Set the saw blade so it will cut about 1/4 inch to 1/2 inch deep. A circular saw with a masonry blade can also be used to either score or completely cut through the block. A garden hose that is set very low is perfect for this. When using a cut-off saw, always wear steel-toed shoes, heavy duty gloves, shin guards, goggles, a full face shield, and hard hat. Always unplug the circular saw before adjusting blade depth. My aim was to remove 3/4 of the paver, "Helped me plan a cut for a drain in my sidewalk.". However, you may still need a sledge hammer or jack hammer if the saw doesn't quite make it all of the way through the concrete. For a 1-week chalk lifespan, use blue and white colors. Diamond blades are strong enough to cut through tough materials like concrete, brick, and granite. You should be able to remove the fence with a jackhammer, wheelbarrow, shovel, and dumpster. Do not over tighten the blade-locking nut. Find concrete block at Lowe's today. An angle grinder's design enables it to cut small square holes in a concrete block; a useful trait when installing electrical outlets in a concrete block wall. Diamond blades cut through concrete blocks with ease, but their expense may be prohibitive. Concrete may be sawed or split, depending on your requirements. Support wikiHow by An angle grinder equipped with a concrete-cutting blade makes straight sharp-edged cuts in a concrete block's surface. Then, face the chalk line at a 45-degree angle and use your dominant hand to guide the saw as you slowly follow the chalk line to make the cut. So, I get to cut a bunch of them. Hello Rosey, Currently model 202580163 8 in. You can use this type of tool if you want a very powerful machine that will get the job done fast. With a Jackhammer or a large Circular Saw equipped with a diamond blade. Wash off accumulated dust from your body as soon as the job is done. Hunker may earn compensation through affiliate links in this story. Drill 4 holes about 8 inches from each side in each of the corners and install 1/2 inch eye bolts with fender washers and nuts. Never apply water to electric cut-off saw blades. Keep your nondominant foot facing the cutline at a 45-degree angle. Do I need to cut it the full 4 inches? Look for mash hammers at hardware stores and home improvement stores, or by ordering one online. Don't forget to remove the blade from the surface every 30 to 45 seconds to avoid overheating! For concrete 6 inches (15 cm) or less in depth, circular saws and cut-off saws can do the trick. While this cut is precise, it is nearly as jagged as one made by scoring and splitting with a chisel. Always wear eye protection when using a circular saw. For longer projects, use orange, yellow, or green for a 2 or 3-week lifespan, and red or black for a 2-month lifespan. He earned a BA in Marketing from the University of Mary Washington in 2017. When constructing a block retaining wall, it's often necessary to install filler blocks and create uniform vertical lines at the ends of the wall. x 16 in. wikiHow marks an article as reader-approved once it receives enough positive feedback. Most masonry chisels have a duller blade than chisels meant for wood since they're used primarily to split and gouge the concrete. Its a matter of choice, imagination, and a little extra work. Shop concrete block and a variety of building supplies products online at Lowes.com. Building codes might also call for concrete reinforcement. If you're cutting a square or rectangle, make sure the straight edge makes a 90-degree angle with the side of the granite so your cut is more precise. Be sure to lay cribbing (wood) under the slab when setting it down, and be sure it is flat so that it wont crack under the stress. This article has been viewed 245,612 times. Find the length of the block using a measuring tape and divide it by 2 if you wish to split the block in half. Gerber specializes in providing brick and stone laying services, concrete installations, and masonry repairs. What is the best way to cut a 24" diameter hole in concrete that is 6" thick? 10 March 2020. 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