How to waterproof concrete floor


  • Under-Slab Waterproofing
  • Waterproof concrete | How does concrete become waterproof?
  • How to waterproof polished concrete floor
  • How is polished concrete waterproofed?
  • Waterproofing
  • Expert advice
  • Under-Slab Waterproofing

    I chose these two questions as the answers will be for two different problems. The second question is something we have many ways to solve as nothing might be built yet. How is polished concrete done? Here I will concentrate more on the other things such as sealers and the final part will be the waterproofing. It will help us to see the worth of waterproofing properly.

    It will also show how proper care is important to protect the value of decorative concrete. As we all know, it will last as long as we take good care of it. If there are no structural defects on the concrete slab or anything else that might cause the slab to be damaged, the polished concrete floor is most often promised to last 20 years.

    In that sense, in a room that has water use like a laundry room or kitchen, it might make sense to waterproof the slab properly. Some waterproofing can also last from 20 years to a half-century, depending on the material used. Most bathroom waterproofing systems talk about 10 years guarantee. You can draw some rough outlines from this kind of information. It will also depend a lot on how much space sees use. Sealing polished concrete floors will prolong its age Waterproofing polished concrete So how can we waterproof polished concrete?

    The surface itself is a little water-resistant after polishing and a densifier has been used to the surface. If a water pipe breaks or some other accident with water happens, water might get in the structures from the edges of the slab. It always finds a way. Polished concrete sealer As stated before, concrete densifiers can and should be used on polished concrete floor surfaces.

    It will stop dusting, make the surface harder and fill the concrete pores. You can also think about a burnished concrete sealer, which is done a little bit differently. A high rpm burnisher is used to spread the topical coating. It will heat and melt to provide some extra protection and provides a high gloss surface for the polished concrete.

    If you want to maintain the shine, you can try buffing polished concrete floors when it starts to get dim. Or just burnish again. The problem with sealers is that if and when it cracks , the water can get through the cracks to the concrete. For that, we might need a stronger solution, How to waterproof polished concrete Now to the interesting part. I guess we could say that concrete densifiers, sealers, etc.

    The kind of that can handle water pipe that starts to spray water or sudden rise of water on the floor from drainage and such accidents. I personally used this method on my garage that has a water drain. I wanted to keep it as a concrete surface so I did the following and poured another slab on top.

    Step 1: Install puddle flange on the garage concrete floor drain. You can install it on top of the slab, but it might not look that good with polished concrete. I installed it on the old garage floor level.

    You can read more about how to install it in the linked article. Step 2: Waterproof the edges of the floor with waterproofing corner tape or whatever is recommended with the waterproof you choose.

    There are self-adhesive tapes on the market, I usually use ones that are not. I use waterproof to attach them to the wall and the floor. Half and half. You want it to reach a good height so it will provide protection if water is rising. If they have a method to do corners, use those, etc. These are built to work together so why not use them. Also, search local info about what is recommended under the slab in a situation like this. Not every product can handle it I would guess.

    Step 4: After the waterproof has cured, you can pour the slab on top of it. Use the method you like the most to do it. Remember that it takes 28 days to cure before you start polishing it. Also, remember that if you want it to reach maximum strength, you need to water it a little if you water cure.

    There were guides linked at the beginning of the article. Step 6: Once you have the ground concrete floor at your hand and you have polished it, nothing stops you from using sealer or some other means like burnishing on it or using floor polish for concrete floors. It will provide some extra protection and help your concrete to last longer. Conclusion You should know now how to waterproof polished concrete floor in two ways. Pretty much floors that have equipment for handling the water heating and such, laundry rooms and other rooms that have the potential for water damage.

    It finds a way in the structures and can come out of surprising places. For that reason, I try to watch my back with the previously mentioned rooms. It changes the color by the chemical reaction so it could be polished in theory.

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    Waterproof concrete | How does concrete become waterproof?

    In fact, given the right environmental conditions, the floor slab can transmit gallons of water into the living space as vapor, and in extreme cases, actually show ponding water.

    There are also health issues and odors to deal with. The pre-construction solution is to use an underslab vapor barrier. See The Underslab Solution in the Winter issue online. These heavy plastic sheets effectively prevent moisture and other gasses from penetrating the slab. Unfortunately, residential and older commercial buildings usually do not have an underslab barrier. Or the barrier could be so torn and damaged that it is no longer effective. Pinpointing the Source The first step to determine if an underslab moisture barrier is needed is to verify that moisture is actually coming through the slab.

    Ken Cotten, owner of Waterproof. Of the cases with moisture issues on the floor, about half had moisture seeping through cracks; the others had moisture in larger areas. Be sure to eliminate the possibility that the moisture is coming from interior sources. The problem was literally in the air. Is a Barrier Needed? The best way to determine if a moisture barrier is needed is to tape a sheet of plastic covering at least several square feet to the floor.

    After 24 hours or more, peel back the plastic and see if there are signs of condensation. Water on the bottom of the sheet means moisture is coming through the slab. If droplets form on the top of the plastic sheet, the problem is likely caused by excessive indoor humidity. Test again after rainstorms, spring thaws, or other event that creates soil saturation near your home.

    There are other tell-tale signs of floor moisture. If the surface is painted or sealed, there might be water-filled blisters in the coating. Pop them, and they sometimes squirt water several feet into the air. Exposed concrete sometimes shows efflorescence, a residue—usually white—of mineral salts being left behind by the migrating moisture.

    Dehumidification If tests determine that the moisture is condensation-related, a dehumidifier is often all that is needed.

    HQ Hometek and EZ Breathe—as well as several others—make units specifically for basement dehumidification. There are porous carpets, paints, and other floor coverings on the market that allow moisture to pass through them.

    Otherwise, moisture will build up between the slab and the finish floor system. Huggins tells of one job where the floor of an unfinished basement was literally soaking. He discovered that all of the water was condensation. Basement humidifiers capture that moisture at it source, the ground level, keeping airborne moisture levels at acceptable levels. In order for these products to bond properly, the floor must be clean, dry, and free of impurities.

    Often, shot-blasting is used to prepare the surface. This type of product is typically used in conjunction with footing drains. Otherwise the pressure is too extreme. So if the floor cracks, your barrier will fail. On residential jobs though, the stakes are higher. This reduces permeability and porosity of the concrete, restricting the flow of fluids—but not vapors—through the matrix.

    Because they bond with the concrete chemically, they cannot delaminate. Depending on the job, product chosen, and installation technique, these may be a viable option.

    Basically, the crew lays a regular underslab membrane over the existing floor, and then pours another concrete floor on top of it. As such, they have a long and successful history. Water that passes through the wear deck at cracks and cold joints is caught by the buried waterproofing membrane where it can be managed to drains.

    For commercial applications, a split-slab may be the best solution. Tom Stoebner, business development manager at Raven Industries, says there are literally dozens of companies making good quality membranes for this type of work, including his own. Any moisture that comes up from the bottom condenses on the waterproof dimple sheet and runs freely to the existing sewer drain.

    Boccia says he sometimes uses dimple sheets, but instead of topping them with wood, pours three inches of concrete over the top. Footing Drains Drainage is an integral part of any waterproofing solution. Except for the dimple membrane solution above, which uses the pre-existing floor drain, all of the methods discussed in this article should be coupled with perimeter footing drains. We leave the footings in place. We remove just enough to catch the water coming under the footer.

    Joe Boccia, who has been installing perimeter drains for more than 35 years, stands by the perimeter drain approach. His company offers a fully-transferrable guarantee that the problem will not return for the life of the structure.

    Whether the situation requires installing perimeter drains, a split slab, dimple membrane, dehumidifiers, or some combination, a wide range of products are available to meet your need.

    How to waterproof polished concrete floor

    It will also depend a lot on how much space sees use. Sealing polished concrete floors will prolong its age Waterproofing polished concrete So how can we waterproof polished concrete? The surface itself is a little water-resistant after polishing and a densifier has been used to the surface.

    If a water pipe breaks or some other accident with water happens, water might get in the structures from the edges of the slab. It always finds a way. Polished concrete sealer As stated before, concrete densifiers can and should be used on polished concrete floor surfaces. It will stop dusting, make the surface harder and fill the concrete pores.

    How is polished concrete waterproofed?

    You can also think about a burnished concrete sealer, which is done a little bit differently. A high rpm burnisher is used to spread the topical coating. It will heat and melt to provide some extra protection and provides a high gloss surface for the polished concrete. If you want to maintain the shine, you can try buffing polished concrete floors when it starts to get dim. Or just burnish again. The problem with sealers is that if and when it cracksthe water can get through the cracks to the concrete.

    For that, we might need a stronger solution, How to waterproof polished concrete Now to the interesting part. I guess we could say that concrete densifiers, sealers, etc. The kind of that can handle water pipe that starts to spray water or sudden rise of water on the floor from drainage and such accidents. I personally used this method on my garage that has a water drain.

    I wanted to keep it as a concrete surface so I did the following and poured another slab on top. Step 1: Install puddle flange on the garage concrete floor drain. You can install it on top of the slab, but it might not look that good with polished concrete. I installed it on the old garage floor level. You can read more about how to install it in the linked article.

    Step 2: Waterproof the edges of the floor with waterproofing corner tape or whatever is recommended with the waterproof you choose.

    Waterproofing

    There are self-adhesive tapes on the market, I usually use ones that are not. I use waterproof to attach them to the wall and the floor. Half and half. You want it to reach a good height so it will provide protection if water is rising.

    If they have a method to do corners, use those, etc. Be sure to allow the floor to fully dry before coating or sealing with floor paint or floor sealers. The third and final step would be to clean the floorensuring the floor is free from any dirt, loose particles or contamination such as grease and oils.

    How to seal or paint a concrete floor As I previously mentioned, the painted, patina and unpainted power floated floor look is very in vogue at the moment. I noticed that most of the high-end boutiques I visited in Paris and Berlin had one of these types of finish on their concrete floors. I will also discuss how to protect and seal or paint a bare concrete floor.

    When it comes to the choice of paints and concrete sealers we can use to preserve this finish, the choice on offer at Promain is vast. Below I will detail the surface preparation required and method of application for our go to sealers and concrete floor coatings. Sika Sikafloor Proseal W Sikafloor Proseal W is a one-part, water dispersed, acrylic emulsion, designed to cure, harden, and seal fresh or hardened concrete. Proseal W is also hard-wearing and impact resistant, ideal for sealing concrete floors subjected to high traffic.

    Sika is a global brand that is trusted by architects and contractors alike. They specialise in concrete products and have a wealth of knowledge and products for concrete floors. Before the applying Sika Proseal the floor will need to be prepared. In the case of old concrete floors you must ensure the surface is in sound condition. It is recommend that the floor is prepared using either high pressure jet washing or blast tracking.

    Ensure all dust, lost material and contamination is completely removed and the surface is dry. If applying to fresh concrete, the surface must be free of surface water. It must be of sufficient strength to withstand finishing operations.

    Following the above surface preparation, apply a coat of Sika Sikafloor Proseal W using brush, roller or low pressure spray equipment. Allow the first coat to cure until tack free. Apply a second coat in the same way as the first. For best result and optimum performance it is recommended that 2 coats are applied.

    After completing the application of Sika Sikafloor Proseal W, allow the floor to cure. This should be for a minimum of 16 hours before returning to service.

    This varnish can also be used on walls as an anti-graffiti tamilnadu item girls phone number and also on previous coated floors. To seal and protect a worn or patina effect, bare or painted floor we first need to prepare the surface for coating with Rustoleum Polycoat 2K. The first step in the process would be to thoroughly clean the floor. You will need to ensure the surface to be coated is clean, dry, sound and free from wax, oil or any other contamination.

    The next step would be lightly sand any area of paint on the floor. This would just be to take the gloss off the surface and produce a key for the to adhere to. If any of the paint is peeling and flaking, this will need to be removed. If any areas of bare concrete has laitance present or has a power floated finish, it is recommended these areas are abraded to open the pores and remove laitance.

    Rustoleum is a 2 pack product, meaning it is supplied in 2 components, a base and a hardener. They need to be combined before application in order to cure. The components are supplied pre-measured in the correct ratio. The best way to mix them together is to use a power drill and paddle mix on a low speed setting. Ensure you mix for a minimum of 3 minutes. Many coatings require an induction time, if so, allow to stand for 5 minutes, or the recommended time on the manufacturers product data sheetbefore applying.

    After allowing the first coat to cure, apply 2 additional undiluted coats. Allow the coating to then cure for 3 days before returning to service. Rustoleum EpoxyShield Clear Sealer Primer Rustoleum EpoxyShield Clear Sealer Primer is a single component water based floor sealer which can be applied to bare suitably prepared concrete floors.

    EpoxyShield reduces dust production, protects the floor against liquid, chemicals and solvent spillage and simplifies the cleaning process.

    Expert advice

    This sealer can also be used as a primer for EpoxyShield Ultra floor paint. Before rushing ahead and applying you first need to prepare the floor for sealing. As previously described ensure the floor is fully cured. If the concrete has a power floated finish or any laitance, remove this by either blast tracking or acid etching. Thoroughly clean the floor removing any loose particles, dirt or contamination and ensure the floor is completely dry. Once suitably prepared, using a roller, apply a coat of EpoxyShield to the surface.

    Once the first coat has cured apply a second coat in the same way. Centrecoat All Surface Protector Centrecoat All Surface Protector is used to seal the surface of concrete floors making them waterproof without changing the appearance of the surface. Another advantage of Centrecoat All surface protector is it will protect the surface from soiling or staining. It even allows for the easy removal of chewing gum.

    All surface protector can even be used on dense polished concrete. All Surface Protector is not limited to concrete. It can also be used both internally and externally on clay tiles, granite, stone, brick, sandstone, limestone, travertine, concrete, porcelain, lime mortar, plus many more.

    Prepare the floor by thoroughly cleaning removing all dirt, loose particles and any contamination.


    How to waterproof concrete floor