Adjust the amount of sand you apply to get the look you like.Repairing Cold Joints While Pouring Cement I can guarantee you it will look better than had you not put the sand onto the wet sealant. Look to see if the joint is aesthetically pleasing. Once you’re sure the sealant has hardened, then carefully brush off the excess sand and save it.
Stop working and allow the caulk or sealant to dry or cure. As soon as you get the sealant to the correct height, I want you to cover the caulk with a 1/8-inch layer of the dry sand. I want you to fill the gap as the sealant instructions say and only do about a foot of the gap. Start filling the gap at the farthest corner where you don’t look so much at the gap. This will make less dust and achieve the same goal. I’d first try to use a wider cold chisel and knock off the highest points. I’d probably not grind off the high spot at the edge of the patio slab. Go to local sand suppliers and get a small bucket of sand that matches what you see in your slab. Realize sand is just small tiny pieces of rock. You need to locate sand that’s got this same colored rock in it. When I look at the photo of your patio slab that you sent me, I can clearly see some coarse sand particles in the concrete. It takes a little work, but it’s so worth it.
#Jade slab crack repair how to
In two of my videos that you didn’t see I show a trick or two how to make cracks in blacktop and concrete disappear. Getting the color to match is step one of making the gap look great. This ensures you’ll never have to do this repair again. Once again, use the exact backer rod that they say works best with their sealant. You’ll use a special foam backer rod that the sealant manufacturer recommends. You don’t fill the entire depth of the gap with the sealant or caulk. I beg you to read the instructions on the label as well as any other printed literature that comes with the sealant. It’s very important that you follow the directions to the letter when working with these caulks and sealants. Once they cure, they produce a tenacious bond with the two concrete slabs. Do an online search and you’ll discover these in minutes. Look for a hybrid urethane sealant that incorporates silane and end-capped polymer technology. These are normally not found at home centers. I’d then use the caulk that the pros use on institutional and commercial buildings. What I’d do if I were you is to clean out the gap to a depth of about 3 inches. Asphalt-saturated fiberboard was the staple expansion joint material of choice for years. When installing a new slab against an existing one, many concrete masons put expansion joint material between the two slabs. You need to fill it with something that’s flexible. For this reason, forget about filling the gap with a hard repair compound that’s cement based. It’s important that the gap between the two slabs be filled with a material that can absorb this motion, as slight as it might be. If you keep the interior of your home at the same temperature throughout the year, your house slab is quite stable and static with respect to size. Since the patio can receive direct sunlight and get rather hot during the day when the summer sun bakes it and the slab your home sits on is shaded, the two pieces of concrete expand and contract at different rates. Concrete, like just about any other material, can expand and contract as the temperature goes up and down. In the building world, many of us call that gap an expansion joint. The unsightly gap to the right of the sliding screen door is supposed to be there. But before we do, let’s discuss the gap you’re wanting to fill and why it’s important that you do this job right. I do have two videos at the website that got very close to answering your questions, so let’s start there.
There are simply so many aspects of home building and maintenance that need to be covered in great detail with video. I discovered in a short amount of time that I could tape all day everyday until I die and not get five percent of the videos finished that need to be done. I sat down one day and made a list of all the videos I’d love to tape. Should I use a grinder to knock that down? How would you deal with this set of problems? Jeff H., Simi Valley, CAĭEAR JEFF: Thanks Jeff for checking out my videos! I’ve got hundreds there about lots of topics. My guess is the concrete mix was soupy and the installers didn’t take the time to finish the slab correctly. There’s a lip on the patio that’s raised up. I’m trying to determine whether to caulk the crack or fill it with some cement-based patching compound. There’s a wide ugly gap between my concrete outdoor patio slab and the slab my house is built on. DEAR TIM: I spent some time at your website but couldn’t locate the exact video that answers my question.
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