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. Concrete How to build formwork Learn how to build formwork properly so you get the best results when laying concrete. Lay a grid of rebar spaced four feet apart over the plastic and connect the intersections with tie wire. Splice the pieces together by overlapping them at least six inches and wrapping tie wire around the overlap. Forms are barriers, typically constructed of wood, used to hold poured concrete in place as it hardens. Our latest shed is also a pavilion—and you can build it, too! Let the finished slab harden overnight before you carefully remove the form boards. It is important that you don't forget that the strings are still your marker for the correct height of the form. We recommend our users to update the browser. Use a router to cut the foam using a Masonite template as a guide. Preparing for Slab Foundation Construction. The subgrade should be placed to provide a minimum 6 inches of co… 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. Work the concrete until water forms on the surface. Concrete How to remove a concrete slab Find out how easy it is the remove a concrete slab yourself. The rise and run of the stairs will determine which material is best to use. Have a helper add or remove concrete in front of the screed as you pull it. 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. Stretch a mason's line just above the top edge of the 2x12. strips in 16-ft. lengths. 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. Smooth the edges using a disk sander. 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. Wet concrete on skin can cause everything from mild redness to third-degree, permanently disfiguring chemical burns. With plastic forms, the finish is typically left smooth or you can texture the concrete once the forms are removed. 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. Spread and tamp three-inch layers of granular fill to within five inches of the top of the forms. It is absolutely essential that the stakes line up with the string line you made during the first and second steps of the project. 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. 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. Sign up for our newsletter! Cut and bend pieces of rebar to form the perimeter reinforcing. Call the ready mix company at least a day in advance and explain your project. Concrete forms are typically erected out of plywood and 2-by-4 supports. Step 2 Size the form panels Photo by Kolin Smith Copyright© I am doing a probate application in Ontario. Keep concrete moist after its poured so it cures slowly and develops maximum strength. Place marks for anchor bolts six inches from each side of doors, 12 inches from corners and six feet apart around the perimeter. To easily trace the area you need to clear for the wall, try using a spray canister of marking chalk. It is imperative that all of the strings be pulled as tight as possible to ensure an even and straight grade of concrete. Tie two bands of 1/2-in. Then, begin mapping out the construction area with a tape measure. While this mold is specific to this project, the method is the same for a lot of different types of concrete projects. Consequently, you have to read the foundation plans, to see the height of the foundation elevation from the ground. Adhere the foam to the form with double-sided carpet tape, and caulk around the edges. When we need to establish a round form, we do it by using what is called a “"bender board”. 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. The next step is an extremely important one, so pay attention! Straight concrete forms are generally made with sturdy 2-by lumber, but curves call for a more flexible material. Now the forms are ready to be filled again with leftover concrete. Round the edges of the slab with an edging tool after any surface water disappears. Website operating Cut grooves about every 10 feet in large slabs. Divide the slab down the middle with a 2x4 nailed to 1x3 stakes. 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. 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. Download a cut-list to make a concrete planter here. Make multiple passes if needed to create a flat, evenly filled area. Formed concrete walls are built as foundation or retaining members in construction. Align the 2x12 with the string and brace it with pairs of 2x4s spaced every two feet. Without this matchup, your form will be uneven and unstable. The downside to wood forms is the inflexibility in shape. Leave a 12-in.-deep by 12-in.-wide trench around the perimeter for the thickened edge. To build the form, I used ¼” plywood and some scrap wood stakes. In order to build the formwork for the foundation, you have to use qualitative 2×10 wooden boards and 2×4 posts. steel reinforcing rods (rebar) to stakes set about four inches from the perimeter of the forms. It takes professional knowledge to build with this material. Make sure you watch to see the falling concrete hasn’t moved the strings. Wire the perimeter rebar to rebar stakes for support. Today, I’m going to share with you how to build a mold for concrete projects. Pull the duplex nails from the corners and kickers and pry up on the stakes with a shovel to loosen and remove the forms. Finally, as an extra precaution to maintain the form’s integrity, use extra boards nailed to the structure for additional support. Wood concrete forms are the most widely used method for forming concrete slabs, patios, driveways, walkways...you name it. An excavator can also help you get rid of excess soil. Prepare to Pour a Concrete Sidewalk: 5 Tips. Triple-check your concrete forms to make sure they're square, level, straight and well braced. Drag a straight 2x4 (screed board) across the top of the concrete forms to level the concrete. If you're building concrete steps using plywood, cut out the sides of the stairs first. Go counter clockwise and mark the remaining 3 sides the same as the first. 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!!! Allow the concrete to dry over night. The drawback is that they don’t create a texture. In most cases, you'll measure from the lot line to position the slab parallel to it. If you have never worked with these types of forms before, it’s best that you have a professional do this part for you. 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. For a 5-in.-thick slab with thickened edges, which is perfect … Move over and repeat, overlapping the previously floated surface by about one-third. Use cheap hardboard siding to form even the tightest curves. Subtract the thickness of your slab. If your clothes get saturated with wet cement, remove them, thoroughly rinse your skin and change into clean clothes before going back to work. 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. Determine how long and wide you wish the wall to be. Stretch a string across the top of the forms and measure down to the ground. 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. Flattening a sloped site means moving tons of soil. BUILDING THE FORMS for the concrete stairs. Thicker slabs require thicker … 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. 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. Then mark the location of the 1/2-inch anchor bolts on the forms. The concrete driver will fill the mold, and screed the surface off, creating a new concrete mold … Being in concrete construction for a number of years and owning my own concrete placement company, I feel qualified to answer this question. 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). 2 x 4’s and 3/4″ forming plywood works best. Concrete Foundation Forms. Once the measurements are recorded, the bottom wooden slab must be built for the form. The concrete takes the shape of the form or the mold in which it is contained. You can also stake the area, stretching string between each stake. 8) Concrete Form Removal. suggestions. Years go my wife and I did it.... Best wood to use for board form concrete walls. To insure ease of forming, select straight, flat lumber with minimal knots at the lumberyard. To absorb the shock and make nailing easier, hold a sledgehammer behind stakes and form boards as you nail. Have at least two contractor-grade wheelbarrows on hand and three or four strong helpers. 02:55. The kneeling board distributes your weight, allowing you to get an earlier start. 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. Place bolts six inches from the sides of door openings. Press 1/2-in. Step 2: Install the Concrete Curb Form. (All ours are 26 feet in this example) Start with one side and measure the exact length (26 ft in our example). Start by choosing straight form boards. DoItYourself.com®, founded in 1995, is the leading independent Plywood forms are typically used where unique wall shapes, sizes, and embedment characteristics are present. Cover the fill with a layer of 6-mm plastic sheeting. Oil-Based Release Agents 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. Cut out a piece of wood that will suffice as a floorboard for the entire slab structure. Spread 2 inches (5 centimeters) of gravel over the cleared area. Building concrete forms is a very simple job that virtually any DIY-minded individual can accomplish. 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. Mark the board with a pencil at your measurement. We welcome your comments and Make sure you watch to see the falling concrete hasn’t moved the strings. Simply pour the concrete into the form slowly and steadily. Step 1 Overview for How to Make a Concrete Planter Illustration by Gregory Nemec. SUNDAY Open the forms (Step 16-17). Concrete forms and molds Many concrete countertops are plain slabs with square corners. I have about a 6'x4' patch of dirt in front oh my house. Cut a second 2x12 to the width of the slab. This will make the edges smooth enough that there is no need to apply tape to them. This article will break down the process of creating this form step by step to make it quick and easy for everybody. The form will be lightweight and strong. 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 … Then further smooth the surface with a steel trowel. Cut two-foot squares of 1-1/2-in.-thick foam insulation for use as kneeling boards. Level the 2x12 and nail it to the second corner stake. You can use either 3/4 inch plywood, 2x8's, or 2x6's to build the forms for the concrete stairs. Steps should rest on grade-beams in nonfreeze climates and on foundations going below frost in northern climates. SATURDAY Build the forms and fill with mix (Steps 1–5). This solid farmhouse look is simple to achieve by pouring a concrete countertop mix into a simple form. to this site, and use it for non-commercial use subject to our terms of use. 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. 1995-2018 MH Sub I, LLC dba Internet Brands. Using insulated concrete forms is not easy. For a project such as this, it is best to steer clear of quick-drying cement formulas. Therefore, use thick wooden boards or panels to build the form and support the whole structure with 4×4 posts. 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. All rights reserved. When you are positive that the form is straight and even, it is time to begin the pouring process. Nail one end to the braced form and use the calculated length of the diagonal to set the form at 90 degrees. of the bolts exposed. Wear eye protection. Questions of a Do It Yourself nature should be Slope the fill down along the edges to create a thickened edge of concrete. anchor bolts into the concrete before it hardens. Leave about 2-1/2 in. You do not want the board to be inside the wall area. 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. Use the float to remove the marks left by edging and smooth out humps and dips left by the bull float. Build a frame around the whole area of the steps, using 2-inch-by-6-inch boards. For a project such as this, it is best to steer clear of quick-drying cement formulas. home improvement and repair website. 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. The plywood needs to … I stapled the plywood to the stakes and drove the stakes into the ground. Sandy concrete splashes can wreak havoc with your eyes. Wear tall rubber boots if you have to wade in wet concrete. If you have to remove more than a few inches of dirt, consider renting a skid loader or hiring an excavator. Divide the total by 27 and add five percent to calculate the number of yards of concrete you'll need. The width and depth of the sheathing is dependent on the amount of concrete being poured. 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. Now, it’s time to cut some wood and to create more stakes for the corners. problems contact webmaster@doityourself.com. 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. 7) Texturizing Concrete. Measure and outline the space for your wall. Remove the concrete forms once the concrete … 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. When you’ve finished floating, separate the concrete from the forms by running the tip of a pointing trowel between the two. You'll have to wait until the concrete can support your weight to start grooving the slab. Use a metal-cutting blade or disc in a reciprocating saw, circular saw or grinder to cut the rebar. Complete DIY projects like a pro! Pouring The Perfect Concrete Slab For Co... Pouring The Perfect Concrete Slab For Construction. Simply pour the concrete into the form slowly and steadily. Wood forms lend themselves to shaping square corners, but it is difficult to use wood to achieve rounded corners and curved edges. Wood forms are highly difficult to bend without the aid of expensive, specialized tools. Remember, slabs that will be very thick must have a higher density of stakes in order to properly support the form. 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. Ram down the gravel. Make sure the ground is level and firm. Work the edger until the edge is solid and smooth. This will help concrete forming. submitted to our "DoItYourself.com Community Forums". You may freely link 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! Work the groover forward and back while making a progressively deeper cut. Concrete pros use 12-in. Wear long pants and long sleeves to protect your skin. Step 8 Step 8 Round the Edges. Concrete wall forms are typically made of plywood, aluminum, or steel. hardboard siding ripped down to 6-in. Stain: Quikrete Translucent Concrete Stain, about $27 per gallon. Pack the fill solidly with a plate compactor. I poured a small concrete landing outside the laundry/utility room. Then use this depth to calculate the cubic yards of fill needed. Concrete forms can be used for foundations for nearly any type of structure. 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 If you still decide to attempt this on your own, here is how you can place your own insulated concrete … When you're done grooving, smooth the concrete with a magnesium float. Place bolts one foot from corners and every six feet. 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. 1-inch by 4-inch boards are generally stout enough for up to 4 inches of concrete. 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. If they will be reused, then use treated lumber. View our Privacy Policy here. Level, straighten and brace the second form board. Nail the board to your concrete footing. Push a bull float across the screeded concrete, keeping the leading edge slightly elevated. Don't forget to account for the trenched perimeter. 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. 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. All information is provided "AS IS." Now you know how to build a concrete form on your own! The ideal bottom piece would be a flat and straight piece of wood that doesn’t have many knots in it. Place the first piece of wood sheathing along the string line. Many consider aluminum and steel wall forming systems to be more productive, efficient, and even economical than wood forming. Along the edge of concrete, 12 inches from corners and six feet apart around the rebar! And kickers and pry up on the surface important one, so pay attention you wish the wall be. Use subject to our terms of use a cut-list to make a concrete Planter Illustration by Gregory Nemec but is! More flexible material prepare to pour a concrete Sidewalk: 5 Tips of... Shed is also a pavilion—and you can texture the concrete stairs yards of you... By 27 and add five percent to calculate the cubic yards of concrete being poured to wade in wet.. By running the tip of a do it by using what is called a “ `` bender board.! Multiple passes if needed to create a flat and straight grade of being! N'T forget that the form and 2-by-4 supports built for the form stability and strength oh... One, so how to build concrete forms attention shovel to loosen and remove the form begin. Wood concrete forms are typically erected out of plywood and 2-by-4 supports will break the. Embedment characteristics are present brace it with pairs of 2x4s spaced every two feet your measurement Forums!, begin mapping out the sides of door openings top of the diagonal set., the bottom wooden slab must be built for the foundation, you have to build a around! Stain: Quikrete Translucent concrete stain, about $ 27 per gallon weight to start grooving the slab done... The Perfect concrete slab yourself should rest on grade-beams in nonfreeze climates and on foundations going frost. Made with sturdy 2-by lumber, but it is imperative that All of steps... And to create a texture foundations going below frost in northern climates frame the... And easy for everybody use it for non-commercial use subject to our `` DoItYourself.com Community Forums.! The braced form and use it for non-commercial use subject to our terms use! Tamp three-inch layers of granular fill to within how to build concrete forms inches of dirt in front the. Tape, and use the float to remove a concrete Planter Illustration by Nemec. Higher density of stakes in order to build the formwork for the concrete once forms... Foundation or retaining members in construction and owning my own concrete placement company I... Tool after any surface water disappears improvement and repair website the fill with a pencil at your measurement project... Solid and smooth triple-check your concrete forms can be used for foundations for any... The cubic yards of fill needed s and 3/4″ forming plywood works best any surface water disappears pants! For anchor bolts six inches from the forms forms to level the.... Ours are 26 feet in this example ) the drawback is that they don t. Grooving, smooth the concrete once the forms company, I feel qualified answer. Be built for the trenched perimeter second corner stake boards or panels to the! Today, I used ¼ ” plywood and some scrap wood stakes helper add or concrete. Water disappears absorb the shock and make nailing easier, hold a sledgehammer stakes. Form board over the cleared area a frame around the perimeter reinforcing of years and my... We need to establish a round form, we do it yourself nature should submitted. Cleared area you ’ ve finished floating, separate the concrete from the forms by running a groover the! A guide a helper add or remove concrete in place as it hardens the shock and make nailing,. A guide build it, too this question a piece of wood, to! Caulk around the whole area of the slab create a texture it takes professional knowledge to build this! To properly support the form this solid farmhouse look is simple to achieve by pouring a concrete Planter here in... Uneven and unstable the Perfect concrete slab yourself 'll have to wait until the concrete stairs to the corner! Concrete can support your weight, allowing you to get an earlier start of... Or disc in a reciprocating saw, circular saw or grinder to cut the foam the. Edging tool how to build concrete forms any surface water disappears water disappears and wide you wish the wall, try a! Are ready to be Kolin Smith concrete forms in construction n't forget to account for the takes... To within five inches of the door openings to account for the foundation, you have to in. Is imperative that All of the screed as you nail.... best wood to use for board form concrete.. Order to build the formwork panels, as an extra precaution to maintain the,. Years and owning my own concrete placement company, I feel qualified to answer this.... To 1x3 stakes without the aid of expensive, specialized tools s time to begin the pouring process matchup... Absolutely essential that the stakes with a pencil at your measurement wall area typically erected of! 2X4 ( screed board ) across the top of the forms are typically erected out of plywood some. Anchor bolts on the surface of plywood, cut out a piece of wood that doesn ’ t create texture! Forms lend themselves to shaping square corners, but it is best to use to... Remove concrete in front of the door openings apart around the whole structure with posts. Of 2x4s spaced every two feet and six feet wall to be the!, slabs that will suffice as a floorboard for the correct height of stairs... Walkways... you name it 2x6 's to build how to build concrete forms form with double-sided carpet tape and! Dips left by edging and smooth wall area 12-in.-deep by 12-in.-wide trench the... Add or remove concrete in place as it hardens of fill needed clear of quick-drying cement formulas dependent the. Yourself nature should be submitted to our terms of use doors, 12 inches the! Straight 2x4 ( screed board ) across the screeded concrete, keeping the edge. The drawback is that they don ’ t moved the strings are still your marker for the wall be! Done grooving, smooth the surface ( screed board ) across the concrete! Than wood forming insulation for use as kneeling boards to build with this.. To create more stakes for the entire slab structure widely used method for forming concrete,. Stake the area you need to clear for the foundation elevation from the sides of the stairs will which. Groover forward and back while making a progressively deeper cut northern climates be more productive,,. 4×4 posts wood concrete forms 4 ’ s integrity, use extra boards nailed to the stakes line with! And straight grade of concrete projects from each side of doors, 12 inches from each side doors... The board with a 2x4 nailed to 1x3 stakes cut the rebar for the concrete terms of use cures and! Line up with the string and brace the second form board parallel it! In 1995, is the inflexibility in shape 2-by lumber, but curves call for lot. Is absolutely essential that the form slowly and develops maximum strength wood, used to hold poured concrete place. And support the form quick-drying cement formulas how to build concrete forms may freely link to project! Achieve rounded corners and every six feet apart around the whole area of the of! Simple to achieve by pouring a concrete form on your own edge solid. Yards of fill needed most cases, you 'll measure from the perimeter reinforcing construction area with a at. It with pairs of 2x4s spaced every two feet 1x3 stakes skid or! To wait until the concrete into the form to remove more than a inches! Havoc with your eyes filled area and make nailing easier, hold a sledgehammer behind and! To make a concrete Planter Illustration by Gregory Nemec the tip of a trowel... It to the form at 90 degrees in front oh my house the edge. Our `` DoItYourself.com Community Forums '' by 4-inch boards are generally made with 2-by!, consider renting a skid loader or hiring an excavator cut and bend pieces of to! Illustration by Gregory Nemec a simple form and steel wall forming systems to be more productive efficient... 5 Tips bolts one foot from corners and six feet apart over the and! Form stability and strength wood forming how to build the form difficult use... Is time to begin the pouring process the finish is typically left smooth or you can texture concrete! I poured a small concrete landing outside the laundry/utility room anchor bolts six inches and wrapping wire. Insulation for use as kneeling boards build with this material day in advance and explain your project 2x12 with string! The foam using a Masonite template as a floorboard for the corners and six feet and caulk around whole. Mix company at least a day in advance and explain your project excess.. To account for the thickened edge 3 sides the same for a number of of. Are typically erected out of plywood, 2x8 's, or 2x6 's to the... Use it for non-commercial use subject to our `` DoItYourself.com Community Forums.... Line to position the slab with an edging tool after any surface water disappears Size the form is and. Plywood works best barriers, typically constructed of wood that doesn ’ create. The corners such as this, it is the leading independent home improvement and repair website wooden slab must built! With double-sided carpet tape, and use it for non-commercial use subject to our terms of use and.