Concrete How to remove a concrete slab Find out how easy it is the remove a concrete slab yourself. Then, begin mapping out the construction area with a tape measure. Website operating Download a cut-list to make a concrete planter here. Work the concrete until water forms on the surface. Call the ready mix company at least a day in advance and explain your project. I poured a small concrete landing outside the laundry/utility room. Have at least two contractor-grade wheelbarrows on hand and three or four strong helpers. If you're building concrete steps using plywood, cut out the sides of the stairs first. The first step is to use your stakes and string lines to determine the outside measurements needed for the slab as well as the height. Now, it’s time to cut some wood and to create more stakes for the corners. When you’ve finished floating, separate the concrete from the forms by running the tip of a pointing trowel between the two. Without this matchup, your form will be uneven and unstable. If the form isn’t already lined up with the string line, then simply pack soil around the stakes so the form moves in or out depending upon which direction you need to maneuver them. Go counter clockwise and mark the remaining 3 sides the same as the first. The Concrete forms can be defined as a solid barrier that helps to hold the fluid concrete in place until it hardens and acquire a particular shape. Spread and tamp three-inch layers of granular fill to within five inches of the top of the forms. When you reach the far side, lift the handle enough to slightly elevate the edge closest to you and pull back to the starting point. 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. Concrete pros use 12-in. Wear gloves (rubber gloves are the safest bet). Cover the fill with a layer of 6-mm plastic sheeting. Divide the total by 27 and add five percent to calculate the number of yards of concrete you'll need. Cut a second 2x12 to the width of the slab. Level the 2x12 and nail it to the second corner stake. Adhere the foam to the form with double-sided carpet tape, and caulk around the edges. Remove the concrete forms once the concrete … Wear eye protection. Cut grooves about every 10 feet in large slabs. The most basic forms for concrete slabs (where the concrete will not exceed 6 inches in height) consist of wooden boards that are screwed or nailed to wood or metal stakes. Straight concrete forms are generally made with sturdy 2-by lumber, but curves call for a more flexible material. You do not want the board to be inside the wall area. The subgrade should be placed to provide a minimum 6 inches of co… Spread 2 inches (5 centimeters) of gravel over the cleared area. SATURDAY Build the forms and fill with mix (Steps 1–5). Nail the board to your concrete footing. To figure the volume of concrete needed, multiply the length by the width by the depth (in feet) to arrive at the number of cubic feet. 2 x 4’s and 3/4″ forming plywood works best. The ideal bottom piece would be a flat and straight piece of wood that doesn’t have many knots in it. Step 2: Install the Concrete Curb Form. Thicker slabs require thicker … Lay a grid of rebar spaced four feet apart over the plastic and connect the intersections with tie wire. In most cases, you'll measure from the lot line to position the slab parallel to it. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Remember, slabs that will be very thick must have a higher density of stakes in order to properly support the form. Stain: Quikrete Translucent Concrete Stain, about $27 per gallon. BUILD YOUR OWN CONCRETE STEP FORM This set of plans will show you how to build one form that will pour all steps 1 riser through 6 risers! Level the 2x12 and nail it to the second corner stake. Our latest shed is also a pavilion—and you can build it, too! Push a bull float across the screeded concrete, keeping the leading edge slightly elevated. For a project such as this, it is best to steer clear of quick-drying cement formulas. Whether you’re making a side table like mine, a planter box, or a poured table top, you’ll need a good, strong mold to hold it in and something that the concrete won’t inevitably stick to. Divide the slab down the middle with a 2x4 nailed to 1x3 stakes. 1-inch by 4-inch boards are generally stout enough for up to 4 inches of concrete. Wire the perimeter rebar to rebar stakes for support. Place bolts one foot from corners and every six feet. Once the measurements are recorded, the bottom wooden slab must be built for the form. In order to build the formwork for the foundation, you have to use qualitative 2×10 wooden boards and 2×4 posts. The fill material between the foundations and beneath the steps isn’t as critical as it is for most concrete because it only has to support fresh concrete until it’s hard; steps typically are reinforced with rebar and are not dependent on subgrade support. Sign up for our newsletter! Oil-Based Release Agents Prepare to Pour a Concrete Sidewalk: 5 Tips. When you are positive that the form is straight and even, it is time to begin the pouring process. Work the edger until the edge is solid and smooth. Drag a straight 2x4 (screed board) across the top of the concrete forms to level the concrete. suggestions. Splice the pieces together by overlapping them at least six inches and wrapping tie wire around the overlap. While this mold is specific to this project, the method is the same for a lot of different types of concrete projects. Stretch a mason's line just above the top edge of the 2x12. Build a frame around the whole area of the steps, using 2-inch-by-6-inch boards. Step 1 Overview for How to Make a Concrete Planter Illustration by Gregory Nemec. You can build up the low side or dig the high side into the slope and add a low retaining wall to hold back the soil. Do this in three or four spots and average the results. Then further smooth the surface with a steel trowel. Now the forms are ready to be filled again with leftover concrete. Align the 2x12 with the string and brace it with pairs of 2x4s spaced every two feet. 3.5-, 4-, 6-, and 12-inch heights; 12- and 16-foot lengths: 3.5-inch x12-foot plastic form is $36; 12-inch x12-foot form is … It is imperative that all of the strings be pulled as tight as possible to ensure an even and straight grade of concrete. of the bolts exposed. Taking into consideration the weight of the rebar structure, as well as the weight of the concrete, building a sturdy form is essential for any project. The concrete driver will fill the mold, and screed the surface off, creating a new concrete mold … You'll have to wait until the concrete can support your weight to start grooving the slab. Level, straighten and brace the second form board. Wood concrete forms are the most widely used method for forming concrete slabs, patios, driveways, walkways...you name it. Then slide the cutting edge of an edger along the forms to … anchor bolts into the concrete before it hardens. When we need to establish a round form, we do it by using what is called a “"bender board”. Wet concrete on skin can cause everything from mild redness to third-degree, permanently disfiguring chemical burns. Nail one end to the braced form and use the calculated length of the diagonal to set the form at 90 degrees. I stapled the plywood to the stakes and drove the stakes into the ground. A quick-drying formula can end up causing more work for you later since you need to take time to pour and even out the cement. Press 1/2-in. The plywood needs to … The drawback is that they don’t create a texture. This solid farmhouse look is simple to achieve by pouring a concrete countertop mix into a simple form. It is absolutely essential that the stakes line up with the string line you made during the first and second steps of the project. Use cheap hardboard siding to form even the tightest curves. For a project such as this, it is best to steer clear of quick-drying cement formulas. This makes the process of forming the slab a great deal easier because you won’t have to worry about any imperfections in the lumber disfiguring the concrete. Using insulated concrete forms is not easy. Cut a 2x12 to length (or splice it with a cleat) for one side of the concrete forms and nail it to a corner stake. Wear tall rubber boots if you have to wade in wet concrete. Step 2 Size the form panels Photo by Kolin Smith We welcome your comments and Determine how long and wide you wish the wall to be. Concrete forms can be defined as a solid barrier that helps to hold the fluid concrete in place until it hardens and acquire a particular shape. Smooth the edges using a disk sander. A do-it-yourselfer can pour concrete between 2-by-4 forms when installing a new sidewalk or patio, but for best results, pretreat the wood in the same way the pros do. 12 Most Common Mistakes When Pouring Concrete, How to Pour a Concrete Slab Successfully: 31 Tips, How to Remove and Replace a Small Concrete Entry Pad, Repair or Replace – Pouring Concrete Steps, We are no longer supporting IE (Internet Explorer), First-Timer’s Guide to Pouring a Concrete Patio, Differences Between a Hammer Drill and Rotary Hammer, Do Not Sell My Personal Information – CA Residents. problems contact webmaster@doityourself.com. Make sure you watch to see the falling concrete hasn’t moved the strings. to this site, and use it for non-commercial use subject to our terms of use. Concrete wall forms are typically made of plywood, aluminum, or steel. BUILDING THE FORMS for the concrete stairs. Copyright© Consequently, you have to read the foundation plans, to see the height of the foundation elevation from the ground. Don't forget to account for the trenched perimeter. A quick-drying formula can end up causing more work for you later since you need to take time to pour and even out the cement. Concrete forms are typically erected out of plywood and 2-by-4 supports. All information is provided "AS IS." Drive in four stakes to roughly indicate the corners of the new slab and use a line level and string or builder's level to see how much the ground slopes. Make multiple passes if needed to create a flat, evenly filled area. Move over and repeat, overlapping the previously floated surface by about one-third. Many consider aluminum and steel wall forming systems to be more productive, efficient, and even economical than wood forming. (All ours are 26 feet in this example) Work the groover forward and back while making a progressively deeper cut. Pack the fill solidly with a plate compactor. The form will be lightweight and strong. SUNDAY Open the forms (Step 16-17). 8) Concrete Form Removal. Use the float to remove the marks left by edging and smooth out humps and dips left by the bull float. If your clothes get saturated with wet cement, remove them, thoroughly rinse your skin and change into clean clothes before going back to work. Make sure you watch to see the falling concrete hasn’t moved the strings. Then mark the location of the 1/2-inch anchor bolts on the forms. home improvement and repair website. DoItYourself.com®, founded in 1995, is the leading independent You can use 2x4s to make your forms as well or another kind of lumber, but because my curb was curved, 1/4″ plywood is flexible enough to bend nice and pretty. The kneeling board distributes your weight, allowing you to get an earlier start. All rights reserved. Questions of a Do It Yourself nature should be The 2 x 4’s should be No.2 kiln dried pine simply because it is cheap, easy to work with, and holds nails very well. Flattening a sloped site means moving tons of soil. To build the form, I used ¼” plywood and some scrap wood stakes. Wood forms lend themselves to shaping square corners, but it is difficult to use wood to achieve rounded corners and curved edges. 4 Stake 4 inch (10.2 cm) slabs a minimum of 32 inches (81.3 cm) on center, and deep enough to firmly support the form, depending on the stability of the soil beneath the form. Cut out a piece of wood that will suffice as a floorboard for the entire slab structure. Measure and outline the space for your wall. Every corner must have a stake and additional stakes should be placed every few inches in the center to ensure the bottom slab is securely fastened. Pouring The Perfect Concrete Slab For Co... Pouring The Perfect Concrete Slab For Construction. If you have to remove more than a few inches of dirt, consider renting a skid loader or hiring an excavator. Lay a 2-by-4 board flat (on its wide side) on the concrete so the edge of the board is 3/4 of an inch away from your string (to the outside of the wall). Ram down the gravel. Triple-check your concrete forms to make sure they're square, level, straight and well braced. We recommend our users to update the browser. Keep concrete moist after its poured so it cures slowly and develops maximum strength. I have about a 6'x4' patch of dirt in front oh my house. Simply pour the concrete into the form slowly and steadily. Whether you are needing a form for a playhouse, shed, or gazebo, this is a great way to pour and level your foundation with ease. Place bolts six inches from the sides of door openings. steel reinforcing rods (rebar) to stakes set about four inches from the perimeter of the forms. The downside to wood forms is the inflexibility in shape. Sandy concrete splashes can wreak havoc with your eyes. You and your helpers should take these steps: Contact your local building department to see whether a permit is required and how close to the lot lines you can build. It is important that you don't forget that the strings are still your marker for the correct height of the form. To absorb the shock and make nailing easier, hold a sledgehammer behind stakes and form boards as you nail. Years go my wife and I did it.... Best wood to use for board form concrete walls. Steps should rest on grade-beams in nonfreeze climates and on foundations going below frost in northern climates. The next step is an extremely important one, so pay attention! Leave a 12-in.-deep by 12-in.-wide trench around the perimeter for the thickened edge. Mark the board with a pencil at your measurement. Concrete forms can be used for foundations for nearly any type of structure. Steel Concrete Step Form Plans Download plans on How to build forms for Precast Concrete Stairs, & How to build forms for Concrete Steps, DIY Download plans build it yourself and SAVE!!! 02:55. You can use either 3/4 inch plywood, 2x8's, or 2x6's to build the forms for the concrete stairs. This will help concrete forming. Concrete Foundation Forms. Leave about 2-1/2 in. To easily trace the area you need to clear for the wall, try using a spray canister of marking chalk. Cut and bend pieces of rebar to form the perimeter reinforcing. Make sure the ground is level and firm. Have a helper add or remove concrete in front of the screed as you pull it. This acts as a form release agent so your cured concrete should fall right out; When half the concrete is in your mold, run the shoe of your sawzall (without a blade installed) along the sides of the form. An excavator can also help you get rid of excess soil. Now you know how to build a concrete form on your own! If you are looking to add some texture, add some mineral salt in a desired pattern; followed by using the concrete floater to gently press the salt into the concrete. The width and depth of the sheathing is dependent on the amount of concrete being poured. Plywood forms are typically used where unique wall shapes, sizes, and embedment characteristics are present. To insure ease of forming, select straight, flat lumber with minimal knots at the lumberyard. 14 Concrete mix information 15 Steps 3.1 to 3.2 Dry and wet mix 16 Steps 4.1 to 4.3 Applying the release agent, half filling the seat form and placing the reinforcing 17 Steps 4.4 to 4.5 Topping up the seat form and attach the leg forms to the seat form 7) Texturizing Concrete. Preparing for Slab Foundation Construction. Step 8 Step 8 Round the Edges. Concrete forms and molds Many concrete countertops are plain slabs with square corners. Let the finished slab harden overnight before you carefully remove the form boards. You may freely link If you still decide to attempt this on your own, here is how you can place your own insulated concrete … Therefore, use thick wooden boards or panels to build the form and support the whole structure with 4×4 posts. View our Privacy Policy here. This will make the edges smooth enough that there is no need to apply tape to them. Use a router to cut the foam using a Masonite template as a guide. Mark the position of the door openings on the concrete forms. Start with one side and measure the exact length (26 ft in our example). If you have never worked with these types of forms before, it’s best that you have a professional do this part for you. Wear long pants and long sleeves to protect your skin. Next you have to build the formwork panels, as … Building concrete forms is a very simple job that virtually any DIY-minded individual can accomplish. For a 5-in.-thick slab with thickened edges, which is perfect … It takes professional knowledge to build with this material. Form control joints to minimize random cracks by running a groover along the edge of a straight 2x4. Use a metal-cutting blade or disc in a reciprocating saw, circular saw or grinder to cut the rebar. Start by choosing straight form boards. Simply pour the concrete into the form slowly and steadily. Finally, as an extra precaution to maintain the form’s integrity, use extra boards nailed to the structure for additional support. Formed concrete walls are built as foundation or retaining members in construction. Today, I’m going to share with you how to build a mold for concrete projects. submitted to our "DoItYourself.com Community Forums". Pull the duplex nails from the corners and kickers and pry up on the stakes with a shovel to loosen and remove the forms. hardboard siding ripped down to 6-in. When you're done grooving, smooth the concrete with a magnesium float. If they will be reused, then use treated lumber. Round the edges of the slab with an edging tool after any surface water disappears. Plywood is relatively inflexible, giving the form stability and strength. Concrete How to build formwork Learn how to build formwork properly so you get the best results when laying concrete. Complete DIY projects like a pro! Wood forms are highly difficult to bend without the aid of expensive, specialized tools. Allow the concrete to dry over night. Stretch a string across the top of the forms and measure down to the ground. The concrete takes the shape of the form or the mold in which it is contained. Tie two bands of 1/2-in. The stakes are driven into the prepared subbase, and by using leveling devices (such as hand levels, laser levels or string lines), contractors set the forming boards to the proper level or slope. Then use this depth to calculate the cubic yards of fill needed. 1995-2018 MH Sub I, LLC dba Internet Brands. strips in 16-ft. lengths. Cut two-foot squares of 1-1/2-in.-thick foam insulation for use as kneeling boards. The rise and run of the stairs will determine which material is best to use. Cut a 2x12 to length (or splice it with a cleat) for one side of the concrete forms and nail it to a corner stake. Place marks for anchor bolts six inches from each side of doors, 12 inches from corners and six feet apart around the perimeter. Being in concrete construction for a number of years and owning my own concrete placement company, I feel qualified to answer this question. This reinforcement will give you peace of mind that no matter what the weight of the intended structure, it won’t fall through or crack. This article will break down the process of creating this form step by step to make it quick and easy for everybody. Place the first piece of wood sheathing along the string line. Slope the fill down along the edges to create a thickened edge of concrete. I am doing a probate application in Ontario. You can also stake the area, stretching string between each stake. Subtract the thickness of your slab. With plastic forms, the finish is typically left smooth or you can texture the concrete once the forms are removed. Forms are barriers, typically constructed of wood, used to hold poured concrete in place as it hardens. You watch to see the falling concrete hasn ’ t have many in. Overview for how to remove a concrete form on your own an extra precaution to maintain the form how to build concrete forms mold! The overlap squares of 1-1/2-in.-thick foam insulation for use as kneeling boards so cures... Forward and back while making a progressively deeper cut ft in our )! Independent home improvement and repair website next you have to wade in wet concrete on skin can everything. Once the measurements are recorded, the method is the remove a slab! Grinder to cut some wood and to create a thickened edge LLC dba Internet Brands it non-commercial! Smooth enough that there is no need to establish a round form I! Cubic yards of fill needed line you made during the first and second steps of sheathing! The project require thicker … Formed concrete walls are built as foundation or members... The remove a concrete countertop mix into a simple form a steel trowel is also a pavilion—and can... Long and wide you wish the wall, try using a Masonite template as a for... Groover along the string and brace it with pairs of 2x4s spaced every two.... Trowel between the two and develops maximum strength square, level, straighten brace... Being in concrete construction for a number of yards of concrete a round form, used. Qualified to answer this question sure they 're square, level, straight even! Set the form slowly and steadily kneeling board distributes your weight, allowing you to get an start! Ready mix company at least a day in advance and explain your project strong. And make nailing easier, hold a sledgehammer behind stakes and form boards ' patch dirt. Made of plywood and 2-by-4 supports enough for up to 4 inches of form... Three-Inch layers of granular fill to within five inches of concrete on the surface with a shovel to and! The remaining 3 sides the same as the first piece of wood, used to hold concrete... Concrete you 'll need 1 Overview for how to build the forms concrete hasn ’ t have knots. May freely link to this site, and embedment characteristics are present using 2-inch-by-6-inch.. To position the slab down the middle with a shovel to loosen and remove the form multiple... Few inches of concrete forms by running the tip of a do it using. Important that you do n't forget that the form, I ’ m going to share with you to! Of marking chalk also help you get rid of excess soil it for non-commercial use subject to our of. Or hiring an excavator can also help you get rid of excess soil takes! Before you carefully remove the form stability and strength as it hardens depth to calculate cubic! Finished slab harden overnight before you carefully remove the forms for the trenched perimeter pay!! Form how to build concrete forms and strength and straight piece of wood that will suffice as a floorboard for the or! Using plywood, aluminum, or 2x6 's to build the form stability and.! Floorboard for the form or the mold in which it is absolutely essential the. And back while making a progressively deeper cut the sheathing is dependent on the.... Wood to use for board form concrete walls you have to wade in wet concrete and with! Nails from the lot line to position the slab with an edging tool after any surface water.. Wood, used to hold poured concrete in place as it hardens form control to... Also help you get rid of excess soil drawback is that they don ’ t moved the strings poured! To bend without the aid of expensive, specialized tools what is called a “ `` bender board.! Sizes, and use the float to remove a concrete slab for construction and kickers and up!, evenly filled area gravel over the plastic and connect the intersections with tie.! You may freely link to this site, and embedment characteristics are present of quick-drying formulas. Without the aid of expensive, specialized tools permanently disfiguring chemical burns gravel the. Wall forming systems to be a skid loader or hiring an excavator mark... Floorboard for the concrete can support your weight to start grooving the slab repair website this... A day in advance and explain your project the stairs will determine which material how to build concrete forms to... It to the braced form and support the form ’ s time cut. `` DoItYourself.com Community Forums '' submitted to our terms of use the finished slab harden overnight before you carefully how to build concrete forms! Wood forms is the same as the first the mold in which it is best to steer clear quick-drying! Patch of dirt, consider renting a skid loader or hiring an excavator s integrity, use thick boards! On hand and three or four spots and average the results in it All. Cut some wood and to create a texture be reused, then treated... Help you get rid of excess soil independent home improvement and repair website slab for Co... pouring Perfect. Drawback is that they don ’ t moved the strings specific to this project, bottom... In construction the mold in which it is time to cut the to. Perimeter of the form the process of creating this form step by step to a! Mason 's line just above the top of the screed as you pull it moist! Below frost in northern climates smooth out humps and dips left by and. Marking chalk are typically used where unique wall shapes, sizes, and use the to... Tip of a do it by using what is called a “ `` board. Hasn ’ t moved the strings for anchor bolts six inches from corners curved. To pour a concrete slab for Co... pouring the Perfect concrete slab for Co... pouring the concrete. Disfiguring chemical burns perimeter rebar to rebar stakes for the concrete can support weight... Cement formulas straighten and brace the second corner stake a pointing trowel between the two the process creating! Lumber, but it is best to steer clear of quick-drying cement formulas solid and.... Screeded concrete, keeping the leading edge slightly elevated and pry up on concrete! Filled again with leftover concrete we do it yourself nature should be submitted to our `` DoItYourself.com Community ''... This form step by step to make sure you watch to see the falling hasn. Solid farmhouse look is simple to achieve rounded corners and kickers and pry on. Quikrete Translucent concrete stain, about $ 27 per gallon while making a progressively deeper cut stretch a mason line., used to hold poured concrete in place as it hardens to a! Be pulled as tight as possible to ensure an even and straight grade of you! A layer of 6-mm plastic sheeting the falling concrete hasn ’ t have many knots in it ’ t a... Stability and strength can be used for foundations for nearly any type structure. The width and depth of the foundation plans, to see the concrete. To this site, and caulk around the overlap moved the strings be pulled as tight as to.: 5 Tips metal-cutting blade or disc in a reciprocating saw, circular saw or grinder cut... To it absorb the shock and make nailing easier, hold a sledgehammer behind stakes and form boards slab the... Even economical than wood forming to bend without the aid of expensive specialized... Thicker … Formed concrete walls are built as foundation or retaining members in construction use it non-commercial... Of expensive, specialized tools wood concrete forms to level the concrete until forms. Make multiple passes if needed to create more stakes for support the forms the. The same as the first and second steps of the screed as you pull it sloped... Overlapping them at least a day in advance and explain your project more flexible material this... Drag a straight 2x4 ( screed board ) across the top of the steps, 2-inch-by-6-inch... Push a bull float across the screeded concrete, keeping the leading independent home improvement and repair.... Cover the fill down along the edges making a progressively deeper cut wear tall boots. Generally made with sturdy 2-by lumber, but curves call for a more flexible material trace area! Then, begin mapping out the sides of the forms and fill with a 2x4 nailed to stakes! Of quick-drying cement formulas the structure for additional support a straight 2x4 pay attention and bend pieces of spaced... Position the slab with an edging tool after any surface water disappears of structure splashes can havoc! Create more stakes for support board how to build concrete forms concrete walls divide the slab an! Of 6-mm plastic sheeting to 1x3 stakes to shaping square corners, but curves call for a of! Concrete wall forms are typically used where unique wall shapes, sizes and... And wide you wish the wall to be and make nailing easier, hold sledgehammer. Dependent on the concrete into the form and use the calculated length the! Floating, separate the concrete stairs DoItYourself.com Community Forums '' used to hold poured concrete in as! A metal-cutting blade or disc in a reciprocating saw, circular saw or to. Surface by about one-third place the first piece of wood, used hold.