The plumbing is done, and now im ready to repair the slab. If you will be installing a floor covering, and do not have 4 to 6 months for the trench concrete to dry, you can either use rapid set concrete from cts cement or treat the top of the trench concrete and one foot each side onto the main slab with ardex mc or koster vap 1 2000. Patching concrete slab after plumbing work i am a moderatelycapable diyer, but i hired a contractor for this job because my life is more busy than usual at this time. Adding extra water to concrete will make it more workable and less freeze and crack resistant. It is advised that you place the wirings in a protective pipe or tube together with the roughin. Broke the concrete in my basement to run new pipes for the basement bathroom. How to repair a hole in the floor of a slab foundation put on safety glasses. You can repair a concrete floor by cleaning and straightening the damaged area, and then filling it with mortar. Prepare the edges of the hole by undercutting them with a cold chisel. Installation of sub rough plumbing begins before the pouring of the concrete slab. How to repair a hole in the floor of a slab foundation home guides. Oct 14, 2019 sure, concrete is tough stuff, but even concrete cracks. Product costs, availability and item numbers may vary online or by market. Considerations cutting through a concrete floor should be a last resort.
Apply a layer of crack isolation membrane over cracks to prevent cracks from appearing later in the overlying tile. There are a variety of ways to remove unsound concrete, including highpressure water jets, sand blasting, grinding, scarifying, and, of course, oldfashioned impact methods, such as with scabblers or jack hammers. Rough in plumbing goes beneath the concrete structure or slab where there are wires attached thereto. Installation of subrough plumbing begins before the pouring of the concrete slab. After the primer has cured, mix the compound and spread it onto the floorup to 12 inch thickwith a floor squeegee. Sure, concrete is tough stuff, but even concrete cracks. I also had to break up footings in a few locations as well.
During finishing, the floor is leveled and smoothed with a surface that you can walk across on your bare feet. Patch and level a concrete subfloor preparing the concrete floor. Vinyl concrete patcher is made of a special blend of vinyl resin, fine sand and portland cement. Concrete slab repair for plumbing trench concrete, stone. Letting concrete dry before it cures garuntees cracks. Concrete patch in bath remodel for plumbing pipes youtube. I am perplexed to how the plumber would have glued the drain down before concrete was.
To cut through the steel and concrete, rent a walkbehind concrete wet saw, fitted with a diamond blade. Using the dimensions on the floor plan, measure from the outside of the foundation walls or slab. Many remodel projects in homes with a concrete foundation and slab call for moving plumbing fixtures, such as toilets, sinks and floor drains. Well, the contractor walked midjob, so ill be gcing after all.
How to patch and level a concrete subfloor pretty handy girl. Its important to repair any leak underneath a concrete floor slab as. Patching concrete slab after plumbing work concrete, stone. Jun 23, 2019 patching concrete floor patching concrete floor in basement patching cracks in concrete garage floor. I added additional cement to the concrete mix to give it more strength.
Concrete is also often a major building material in and around homes. The technique for patching cracks will depend on the size of the crack. The concrete should have been set up enough to support wheelbarrow weight after a day, but go ahead and wait the same 7 days. Im pouring concrete over rough plumbing enter image description here. If the floor has a rough finish, apply the polyurethane with a broom or brush using the bristles to work the sealer into the rough surface. A wellfinished concrete floor should be comfortable to use as well as strong and durable. After that, you need to let the concrete dry for a day. For small patching jobs, use a premixed concrete patch. May 30, 2016 any way you slice it, if you want to be an owner builder but worry about the costs of plumbing, doing an informed diy job is a huge cost savings. I used a concrete saw to score the trenches and then a jack hammer to break the concrete.
After breaking up the concrete to run the plumbing for the sinks and toilet, it was time to start framing the walls and ceiling. Installation of subrough plumbing and hvac begin after the concrete pouring in the foundation walls and the formwork taking off. It has strong adhesive properties allowing it to be applied down to a featheredge. Do not use readymix concrete such as quikrete as this is not suitable for patching. Once the concrete is out, you can dig in the remaining trench to remove the sand or soil before running the new plumbing. Patching and repairing concrete can be easy or difficult, depending on the project and the amount of deterioration.
Roughin plumbing goes beneath the concrete structure or slab where there are wires attached thereto. Typically, the plumbing rough in starts just after the rough framing has been completed. Forget about circular saws, concrete blades and jackhammers. Subrough plumbing and hvac installation schedule how to. The reason being, it can be difficult to glue pipes together if rain is dripping down through the roof sheathing. Sand floors will need to be retroweled extensively, to restore a smooth, divot free surface. Plumbing in a concrete slab with images concrete slab, pouring. Our schedule has the roofing contractor starting the day before the plumber in order to get the house dried in. How to sand concrete in 4 easy steps homerepairgeek. Pour the mixture directly from the bucket or use a plastic sprinkler can to distribute it over the old concrete. I am a moderatelycapable diyer, but i hired a contractor for this job because my life is more busy than usual at this time.
Switch the trowel for a wood float to make a rough surface. Vinyl concrete patcher is ideal for making smooth repairs to crack or chipped concrete floors, sidewalks or steps. Start by taking a hammer and chisel and tapping any rounded edges around the crack or hole to make them straight, which will help the mortar stick better. This is of course a licensed plumbers domain so dont bother doing it yourself, unless you are a plumber, or dont intend to get the slab inspected by the council authorities.
Concrete easily absorbs stains, and sealing will prevent that. All pipes passing through concrete walls or floors are protected from breakage. Jan 07, 20 patch and level a concrete subfloor preparing the concrete floor. The plumber installs these stubs right after the builder frames the shell of the house. Large shower units are positioned in the bathroom, but the plumber will not hook them up to the roughedin plumbing stubs until the construction is further along. For a bathroom floor repair, either concrete will perform just as well as the other.
If you have concerns about the state of repair of under slab plumbing or. Temperature changes, heavy weights, and dropped objects can all damage your concrete floor by causing cracks and holes. Surface preparation machines can remove unsound concrete and leave the proper surface profile. As the concrete settles, scrape the surface with a trowel. Holes 1 inch or deeper require a concrete mix with coarse, crushedstone aggregate, which bonds well with existing concrete. How to cut a concrete floor for new plumbing home guides. Crackshot posted in construction techniques on january 12, 2007 11. With years of use though, a concrete floor will wear down, with the once smooth surface becoming roughened or damaged. You can create a smooth surface with a metal trowel.
Learn a simple system to back fill the hole after running your new plumbing in the basement. While concrete is a strong construction material, it can still crack. Chisel all the loose concrete edges so there is an undercut. Oct 24, 2011 installation of sub rough plumbing and hvac begin after the concrete pouring in the foundation walls and the formwork taking off.
The plumber put sand under the pipes to support them at the correct angle. The plumbing system build starts with a concrete slab plumbing rough in. If concrete were poured against the rough parts, it would conform to the contours of the sides. Push air bubbles out to the edge with a jroller or the edge of a. If you get some of the mixture on your skin, rinse the affected area under cool water. Simply pouring wet concrete into a hole in your driveway, sidewalk, or basement floor wont make for a lasting repair. Plumbing in concrete slab benjamin franklin plumbing. You have to prep the edges correctly and use the right materials.
Concrete bonding adhesive eliminates the need to roughen up the surface for the new concrete to adhere. After the primer has cured, mix the compound and spread it onto the. Rough in plumbing is the inslab drainage piping that is laid for all showers, toilets, vanities, laundry basins and kitchen sinks. Underground plumbing backwater valves are required to be accessible for inspection and repair at all times. Removing the existing plumbing leaves holes in the. These rough ins are not below concrete, but they are below the subfloor. Scrub with a concrete degreaser and a stiff brush, then follow up with a pressure washer.
The gravel bed is roughly six inches covering all of the pipes, and will support our insulation and concrete slab. Sep 20, 2019 pour the acid mixture over the old concrete. Checking the plumbing drain roughin installation in the stud walls is one of the most important things you will do. Take your floor plan and measuring tape, and check the location of every pipe. You will be pouring a little over existing floor but not much and feather flat. How to repair a hole in the floor of a slab foundation. Very durable, it can also be aesthetically pleasing. It is advised that you place the wirings in a protective pipe or tube together with the rough in system so as to have an organized and orderly plumbing system. The photo below shows a sink drain, hot water line, and cold water line at a stud wall on the outer edge of the floor slab. Patching concrete floor after rough plumbing terry love.
Then 12 drill horizontal through existing slab, and epoxy rebar, concrete over. After the drain relocation was done i put the sand back in, compacted it. Most compounds require that you first coat the floor with a primer. If you use a readymix concrete patch, all you need to add is water. Overview and total cost of diy rough plumbing in a slab when. Most residential concrete floors are about 4 inches thick and contain steel reinforcement in the form of steel rebar and steel mesh.
After making sure that the concrete has been properly sealed, you are ready to start tiling. After passing the plumbing inspection i back filled the dirt and. If concrete were poured against the rough parts, it would conform to. Most of the trench edges have 12 inches of smooth saw cut with the rest of the edge jagged. Explore the concrete to see if there are any cracks, pits, or discrepancies in levelness that need to be fixed and use a concrete repair kit to fix them. Removing the existing plumbing leaves holes in the floor that must be filled. I used a scraper and lightly hammered any spots that sounded hollow underneath to loosen any weak pieces. Before pouring the self leveler there is some prep work required. Nov 14, 2010 concrete is one of mankinds greatest inventions. As you put the sand in moisten it and tamp it down. Voids around piping passing through concrete floors on the ground are appropriately sealed. Fortunately, you can make simple concrete repairs yourself. You can add a small amount feb 19, 2010 it took about 25 bags of 60 pound concrete mix to fill and repair the new bathroom floor.
Do roughedin shower drains have to be below concrete. Selfleveling concrete is a liquid mortar that you pour and spread onto a sloped, rough, uneven, but structurally sound floor. Vacuum the area around cracks and apply a peelandstick primer with a roller or paint pad. In that time, the concrete should have gained about 75% of its final strength. How can i patch my slab around a roughin pipe in a difficult to access. Use it as a depth gauge to locate pits and craters that need filling, then circle them. Cement or vermiculite floors can be cleaned with a broom or blower, patching any divots or rough areas. This is what i ended up doing after some research and opinion asking. Patching concrete slab after plumbing work concrete. Make sure the piping is well supported and that the closet flange is level. You can mix a pourable patch for this repair, but i dont recommend it. How to back fill and pour new concrete in your basement.