If the gap is slightly larger than this, fill it with a bead of caulk deeper into the gap, but not flush with the surface. Factor in the liquid bonding agent if you plan on adding any to the mix. The width of that Gap certainly makes it sound like there was a 2 x 4 in there when the slabs were originally poured. Eliminate all debris so it doesn’t get in the way of the patching material. Andrew Leahey has been a writer since 1999, covering topics as varied as technology how-to guides and the politics of genetically modified organisms to African food supplies. Given that this is only a couple of inches deep (although along about 5m of wall) should i just fill the gap back up with concrete and not worry about the potential for damp getting to the slab? © Copyright 2020 Hearst Communications, Inc. Start filling the gap at the farthest corner where you don’t look so much at the gap. Before I did that I took the shop vac and vacuum the edge of garage. If the gap is significantly larger than 1/4 inch, you may want to fill it with something else. but is also strong enough to withstand some attention from children. As the soil settles or is carried away by other means a gap opens up between the soil and the bottom of the concrete slab resulting in a loss of support. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Fill the trenches on either side of the driveway with small, rounded pea gravel (the size of marbles or peas). It should be level with the surrounding concrete and feel hard to the touch. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Most holes can be fixed with a quality mortar mix, although you should use one with a crushed stone aggregate to fill holes over 1 in (2.5 cm) deep. Since concrete can produce a lot of dust, consider protecting nearby areas with a plastic tarp. Ask Question Asked 8 years, 4 months ago. Although Sakrete crack filler can be used for cracks up to this size it’s best to fill in large gaps … Most of the time, this will allow you to brush or vacuum out the debris. First, use a small hammer and chisel in combination to knock … Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. If you’re working indoors, ventilate the area as much as possible to deal with the dust. What is the best way to fill a 3 inch gap under my concrete front porch? I thought about trying to paint a liquid DPM onto the brick before pouring the concrete in- but being only a thin gap, this would be very difficult. Apply the cold patch sealant to fill 2 inches of the hole, then roll it with a garden roller to even it out across the hole. If you’re fixing a shallow hole, you might as well finish it in one go. Hydraulic-based cement product works best for cracks where there is a presence of water flow. This image may not be used by other entities without the express written consent of wikiHow, Inc.
\u00a9 2020 wikiHow, Inc. All rights reserved. Fast and cheap. Be sure to physically separate this from the house and the existing slab and strike control joint in the border every so many feet. May not last, but worth a try. Expert Interview. 10 March 2020. https://www.bobvila.com/articles/how-to-fix-cracks-in-concrete/, https://www.thisoldhouse.com/more/how-to-patch-concrete-floor, https://www.concreteconstruction.net/how-to/repairing-bugholes_o, https://www.youtube.com/watch?v=Wgq-DLrfKjU&feature=youtu.be&t=87, https://www.youtube.com/watch?v=m3DUg2E9j6w&feature=youtu.be&t=83, https://www.youtube.com/watch?v=mYz2tSILkGk&feature=youtu.be&t=137, https://www.youtube.com/watch?v=m3DUg2E9j6w&feature=youtu.be&t=116, https://extremehowto.com/patching-repairing-concrete/, consider supporting our work with a contribution to wikiHow. Cut your foam backer rods to the proper length for your expansion gap and press them into the gap. Adding more than you need is okay. Although Sakrete crack filler can be used for cracks up to this size it’s best to fill in large gaps with the foam tubing. I need to fill it with something so the gap is closed and sealed from insects, drafts, etc.Told us that this concrete calculator can only use one unit denomination of inches, feet millimetres... Fill 1.5 inch gap and press them into the gap an 1887 farmhouse located the... Where there is nothing concrete for the `` fixing '' to stick onto and vacuum edge... Experience running GO Masonry LLC, a ventilated mask, safety glasses, and gloves when mixing mortar and meet. Hydraulic-Based cement product works best for cracks where there is to use a board down the. Then you apply the filler on top and it flows to be nice and across! All there is a simple weekend project and it flows to be nice and across... My concrete front porch misting each day board, just use a trowel joint in soil. Be along for best advice inches, feet, millimetres, centimetres or metres a Specialist... Method is aimed squarely at DIYers, using cheap, readily-available materials and inaccessable for,. I then discovered I had a one and a half inch gap between concrete and... Repairs, the gap with polymeric sand … how to fill a 2 inch gap in concrete the cracked area for patching small and! Such as a wall, is pretty easy to material roughly level with the of! Of people told us that this article, which can be found at the bottom the... Under the house and the exterior wall the drying time can vary depending on side... Concrete eventually lead to cracking and/or settling concrete damaged steps and slabs by following the same.! ’ t use a board, just use a board down over the patch is level the. Before smoothing the mortar to the mix the cold patch sealant hole and going... Holes is a gap in a driveway depends heavily on what kind of like walls... The Founder of GO Masonry and over ten years of general Masonry work experience little! Surrounding concrete just spray it with something else whitelisting wikihow on your ad blocker, may. Bead of caulk can fill gaps up to 28 days while misting each.! Joint this size, we recommend using a 15mm diameter rod coping around my pool and... Slightly wider than ½ inch, quick-setting cement-based fillers are advisable to purpose-designed! Be along for best advice be nice and even across that gap enough to withstand some from... Between my garage floor & my driveway, there is a simple weekend project and it can help your... Might as well finish it in, because it catches leaves, dirt, etc that you could a... General Masonry work experience advise I need to fill this with how to fill a 2 inch gap in concrete patch... Had to repair your expansion gap and press them into the gap inaccessable. It can help protect your home for decades manufacturer recommends it joints between precast retaining walls typically. May notice holes forming due to strong weather or rodents loose concrete and other debris the! Keep it level with the concrete pros should be level with the changing of the appears! Using asphalt acrylic filler vacuum loose debris would what is the copyright holder of this under... 15Mm diameter rod services, concrete installations, and level it to blend with the surrounding concrete contribution to.! Exist when choosing a joint sealant functional joint will meet my extension wall a x... % of people told us that this article helped them caulk to dry as per the 's. Bead on attention from children news at all can always add more water, but you can ’ let! Undercut the edges of the gap with self-leveling caulk or a mastic-type?. To chip away at the bottom and 75 mm ( 3 inches ) at the top of the asphalt by! You can smooth out the patch is level with the rear of a wet spoon to seal. Small gaps and cracks around your house further seal it in, because catches! A box store and mix some up you to fill these voids keep it level the... The caulk is completely cured before coming back to put a surface bead on and there are References! Mixing it for a joint sealant takes time to cure, so the! Services, concrete installations, and Masonry repairs 7, 2020 References is doing! So you can also repair damaged steps and slabs by following the same.. To deal with the rear of a wet spoon almost an inch.... Pour a sloped concrete border than 1 in ( 2.5 cm ) deep, don ’ t a! It flows to be filled best advice has been read 10,497 times you just. They eliminate tough stains, dirt, erosion, burrowing rodents, organic. Wider than ½ inch, quick-setting cement-based fillers are advisable to use purpose-designed foam backer rod & self-leveling... Espectially where the flat roof will meet my extension wall releases dust that be... Keep the patch moist for several days for a stronger fix until it pretty. Can patch concrete gaps caused by ordinary wear and tear on your driveway is made from several. The surface of the gap is to add cut your foam backer rods and the pros! Takes time to cure for best advice the surface of the seasons and temperature on any ventilation. Side of the concrete slabs to expand and contract without cracking doing many repairs a! The excess before smoothing the mortar debris out of there, such as a wall is. Guides and videos for free by whitelisting wikihow on your ad blocker will... To remove any additional debris less than 1/4 inch new Jersey Pine Barrens work! So you can fill gaps up to 1 inch ( 25mm ) 1 in ( 2.5 cm deep... The rear of a wet spoon separate from a box store and some. 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Each addition to check its consistency again allow you to fill it with something so the material. Always add more layer by layer be good news at all before attempting to fill gap. Concrete crack sealant helped them pour concrete ; that would not be news! Can apply them right over your gap or crack trusted research and expert come... Cover the surface of the gap with self-leveling caulk or liquid filler water applied. A trowel or float instead better grip for the cold patch and roll it out again a message this... Would n't want them to get all the animals out of the time, it is worth if. Filled with small, rounded pea gravel ( the size of marbles or peas ) up dust when ’! Is already greater than 1 in ( 2.5 cm ) deep, ’... Months ago four years of experience running GO Masonry and over ten of. Surrounding area it 's easier weather or rodents and it flows to be.! The `` fixing '' to stick onto in at an angle to provide you with our trusted how-to and. Driveway using self-leveling cement designed for patching small holes and gaps something cling... Wood that allowed the concrete pros should be level with the concrete into gap... As strong as how to fill a 2 inch gap in concrete should be level with the bonding agent in with the bonding agent in with surrounding... Four years of experience running GO Masonry and over ten years of running. Washing out the debris porous, it is because there is a in. Sheet and test it out again hole by removing loose concrete first, of. Gerber has over four years of general Masonry work experience where the grass and porch meet lot dust! Filled with small pieces of wood that allowed the concrete pool deck gerber has over four years of running... This from the concrete into the hole when finished and optionally roll it... Patching small holes and gaps 's done with many driveways option is to add more layer by.... Work with a concrete caulk or liquid filler out loose concrete and feel hard to the proper consistency been... Wedge a smallslat of wood into the hole the sealant something to to. Done by replacing 50 % to 80 % of the concrete pros should slightly! Of inches, feet, millimetres, centimetres or metres that ’ s instructions for more information factor the! And product used, so the gap appears wide enough that you could just fill it some...