can you pour concrete over painted concrete

Other finishes, such as paint or tile, will also stick to a textured surface more easily. Stripping all of the paint from your concrete is essential, but the job can be a little difficult because painted concrete usually has a protective finish. Outdoor concrete surfaces get dirty very quickly due to exposure to the elements. Again, you will be working in VERY thin layers. As you go, you can scrape the thicker parts back to the container, and add small amounts of water, about a tsp at a time. It spreads across uneven slabs, filling in low spots as it creates a new, level surface. Eventually, those same problems will return, and you may need to replace the concrete anyway. Use a drill with a paddle mixer to mix the concrete evenly. Mix enough water to a small amount of resurfacing concrete so you can spread it easily with a trowel, about 1 part resurfacing concrete to 7 parts water. Roll on more paint to cover the interior. Spread some concrete over the damaged areas with a trowel, then smooth it out with a finishing trowel. To achieve the smoothest repairs possible, you should fix any large pits or cracks prior to completely resurfacing the concrete. Start by painting the edges of the concrete surface. If you plan on leveling a concrete floor, you can do so with relative ease by using a leveling compound. By installing a resin surface over an existing surface such as concrete or tarmacadam you can cut out costly sub base installation costs. The concrete dries out quickly and can become too thick to work. Behr: Concrete & Masonry Paint Stripper No. Mortar cannot be installed directly over painted concrete itself. Make it as thin as you possibly can while getting full coverage. Pouring over old concrete need similar basic formworks that employed with fresh pours. It is important that you clean your aggregate thoroughly before you paint. Pressure washing is the easiest option for removing paint from outdoor concrete surfaces. Concrete that was not properly mixed well when poured is especially prone to damage. This isn’t something you can do just by looking at the slab. The concrete must be saturated, but not so much that there is standing water or puddles. Comment: When we pour concrete floors over existing concrete floors and the new floor is less than 3 inches thick, we use a product called Weld Crete to bond the two floors together. Before pouring concrete over existing concrete driveway or sidewalk surfaces, remove stains and loose material so the new concrete can stick properly. Wait for a few hours to let it set. Acid Staining and Sealed The chemical stains (or acid stains) react with the concrete’s lime content and produce the color. Smooth the concrete with a steel float, which is a steel trowel equipped with a long pole. After pouring the finishing concrete, smooth it out with a finishing trowel or a long-handled industrial squeegee. The key to successfully pouring concrete over an existing concrete surface is to ensure the two layers bond properly. A … The trench should be deep enough to accommodate wooden forms, which should extend 1 to 2 inches above the surface of the concrete. Even though concrete is strong and forms a hard structure, there's nothing in it that helps it stick to old concrete. Concrete paint can be purchased in either latex or … There are several options for stripping paint indoors, but the method that minimizes labor and requires no major equipment is using a concrete paint stripper. Most new construction materials, such as drywall, can be painted shortly after installation. Before mixing, prepare the area to be refinished. That was mid-90's and I've had no issues. If you are in an enclosed place, start in a far corner, working your way toward a door. Once a concrete surface has been painted, resurfacing requires some time and effort. Pour the resurfacing concrete over your old concrete. Smooth the surface using a two-by-four or float, then add texture as desired using tools or a broom. Just a light chewing/scarification will do. Mix the concrete according to the instructions in a 5-gallon bucket. Both of these will work their way down into the concrete. A scratch coat will give the mortar something to hold on to, instead of the layer of paint over concrete. Dig a 6-inch-wide trench around the perimeter of your concrete patio or pad using a small shovel. Doing the prep work before you repaint a concrete floor avoids a peeling paint job later. Dampen the concrete with plain water. Applying parging to foundation walls helps to provide a first layer of defense against the exterior elements. The old concrete needs to be completely clean or else anything you pour over it won’t bond to it. Pour the smaller can of hardener into the epoxy paint, scraping the inside to ensure you get all of it out of the can. You need to consider the added height and weight of the overlay on the existing structure. She received her LEED accreditation from the U.S. Green Building Council in 2008 and is in the process of working towards an Architectural Hardware Consultant certification from the Door and Hardware Institute. You don't need to wait for this scratch coat to dry before adding the new concrete top coat. Pour the Thinset over the concrete. Therefore, a concrete surface that is painted or sealed cannot be acid stained. Installing a resin driveway over concrete provides an easy and cost effective way of enhancing the appearance of your driveway. A stream of water at 4,000 to 5,000 pounds per square inch is suitable, though it is important that you fan the stream to avoid damaging the concrete. The house was built in the late fifties and the slab floor has been painted at least once. Make sure that the height of the formwork is even. Rinse the concrete with plain water from your garden hose. Yes, parging will break down over time because concrete does not have an unlimited lifespan, but a properly applied parge coat will last for a very long time. All Things Concrete: How to Remove Paint from Concrete? Pour concrete over a solid, well-drained base. You can continue to smooth out the concrete with the trowel or squeegee; getting a perfectly smooth surface requires some skill. Don’t worry! Solutions for resurfacing depend on project goals. Allow the … Use a bigger paintbrush for this. A commercial bonding agent helps with that. If the goal is to improve and refresh a surface with full understanding that the painted concrete will need … Step 1 In most cases the answer is YES! Can You Pour New Concrete Over Existing Concrete? Once the concrete has been smoothed out, you have several options for the final finish. Next, use a paint roller to fill in the sections that you didn’t … I can assure you that it was inspected multiple times because of the modification they required. Use a h… Cover the surface with plastic and allow it to dry for a full week before attempting to use surface with the new concrete. It rolls or brushes on like paint, very easy to install & creates a bond between the old & new concrete floors. Because concrete slabs “float” on the soil, soft ground … They may continue to move, which means your newly poured concrete will also move. However, you might also check into sika. Fortunately, you have options for making a concrete surface look new again, and one of these options is applying resurfacing concrete over the old concrete. Concrete is different, however, and needs a lengthy curing period prior to sealing or painting. It can be painted on or applied with a rag. Concrete paints and stains help to mask surface discoloration and signs of wear and tear and they extend the life of concrete by preventing further damage. Simple scratch coat to dry for a full week before attempting to use a spade or tool! Should mix for about 10 hours driveway over concrete provides an easy cost! Is key to successfully pouring concrete over concrete provides an easy and cost effective way enhancing! It can be painted on or applied with a trowel, smoothing out... Requires some time and effort and cost effective way of enhancing the appearance of your concrete or. Different, however, preventing the leveler from binding successfully with the trowel squeegee! Penetrate the concrete dries out quickly and can become too thick to.... Have several options for the final finish to mix the concrete dries out quickly and become... Prevent problems with bonding when you pour concrete over the damaged areas a! 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