This page gives practical advice on checking pipes in the slab. The slab was about 4in thick with wire mesh and a plastic barrier between the concrete and the. Fill until the concrete reaches the tops of the forms. Does anyone know of a good self leveling product that can be poured over this new garage floor so the color is consistent and the rough spots are covered up. If concrete were poured against the rough parts, it would conform to the. Pour the mix into a puddle on the slab and immediately spread it photo 7. Concrete patch in bath remodel for plumbing pipes youtube. How to repair a hole in the floor of a slab foundation.
Concrete slab repair for plumbing trench ive just cut several trenches 23 ft wide x 25 ft long in my existing concrete slab to run plumbing. Why acid etching is no longer recommended as a concrete. Selfleveling concrete is a liquid mortar that you pour and spread onto a sloped, rough, uneven, but structurally sound floor. Before pouring the self leveler there is some prep work required. Well, the contractor walked midjob, so ill be gcing after all. Installation of sub rough plumbing begins before the pouring of the concrete slab. Removing the existing plumbing leaves holes in the floor that must be filled.
You can create a smooth surface with a metal trowel. A rough edge is much better as the new concrete patch will adhere. I have probably 2030sq ft of concrete basement 4 slab that needs to be patched after rough plumbing work. Use a putty knife to fill the crack or hole in the concrete, and then level the top of the resin with the floor using the knife. It can also run under sidewalks, stoops, patios and decks. You will probably be checking the layout after the workers have finished and gone for the day. These plumbing sewer pipes should be checked anytime there had been significant foundation movement or foundation repair. We are redoing the floor of an old stone building that never had plumbing or electricity and are trying to negotiate the services. It took about 25 bags of 60 pound concrete mix to fill and repair the new bathroom floor. How to back fill and pour new concrete in your basement. How to plumb a basement bathroom the family handyman. The pictures below see next post are how the contractor left the work. Switch the trowel for a wood float to make a rough surface.
Although all multistory buildings require multiple small slab penetrations for routing of plumbing, fire protection piping, and ductwork between floors. Patching concrete slab after plumbing work concrete. Fill the damaged areas with epoxy resin to the surface level of the surrounding concrete floor. Simply pouring wet concrete into a hole in your driveway, sidewalk, or basement floor wont make for a lasting repair. Just prior to the contractor ending work, his plumbing and electrical subs had passed their rough inspections, then his demo guy covered up the work in preparation for patching the slab. How to run plumbing under concrete home guides sf gate. We are planning to have a concrete floor foundation with these layers. Plumbing is one of the roughin elements of construction and is. How can i patch my slab around a roughin pipe in a difficult to access. The concrete should be damp when you apply the resurfacer, but not wet to the touch. Get the rough in right, and you are 90 percent of the way there. Patching concrete slab after plumbing work they should have saw cut the floor before chopping.
Use this stepbystep process to smooth out rough wall surfaces. Dont ignore this because water leakage under a concrete foundation can cause additional problems. Installation of sub rough plumbing and hvac begin after the concrete pouring in the foundation walls and the formwork taking off. One of the most important characteristics of selfleveling concrete is that it can provide a very dense and durable concrete floor. So far it looks okay although i think my concrete could have been a little wetter. The slab was about 4in thick with wire mesh and a plastic barrier between the concrete and the wet clay like soil home located in new orleans. The walls have a 2x8 treated board around the bottom which has about 1 12 inches above the top of the concrete floor.
The floor is in different sections and has had plumbing and electrical strips cut in and repoured. This article will get you through the initial stage of this project, the rough plumbing. Helpful illustrations will guide you during the home repair. To keep this damage from spreading too quickly, and to prevent potentially unsafe conditions, youll want to repair these problems before they get too big. Know the roughin of your basement toilet the distance from the wall to the. Thin cracks in concrete that are less than 14inch wide are even easier to patch. Checking the plumbing layout in a concrete slab before it is poured is one of the most important things the home builder will do. Drain pipe, and hot and cold water pipes, ready for slab pour. In the commercial work i design, we require all cutouts to be sawcut.
A concrete floor sealer can help protect your concrete from the elements. The experts show how to repair a waterdamaged subfloor. The plumber test the pipes, cover them with sand and then you can pour the concrete for the basement floor. I added additional cement to the concrete mix to give it more strength. Under slab plumbing diagrams dawson foundation repair. The floor varies from a flat plane by 12 inch to 34 inch. You can mix a pourable patch for this repair, but i dont recommend it. If you use a readymix concrete patch, all you need to add is water. After framing your new dream home, its time to start the plumbing rough in. Then 12 drill horizontal through existing slab, and epoxy rebar, concrete over.
Purchase a liquid concrete patch repair, such as liquid nails concrete repair or quikrete acrylic concrete patch. Patching hole in concrete slab terry love plumbing. Your plumbing contractor should be present when the concrete is poured to ensure no pipe or vent is shoved or kicked out of place. As the concrete settles, scrape the surface with a trowel. For small patching jobs, use a premixed concrete patch. Various thickness overlay concrete construction magazine. In my area, we put 2 gravel, 6 mm visqueen or 10 mm if you can find it. From there, the pipe runs under the floor and out to the city sewage system under the. Vacuum the residual debris at the rough edges with a wetdry vacuum. Repairs after the fact are costly and difficult, and require cutting into the. Concrete slab repair for plumbing trench concrete, stone. Be sure the plumbing lines are well bedded, and no rock is pushing on it, that will cause it to crack. This step in our how to build a home series of articles covers the schedule, preparation, and quality checks for the plumbing.
The dowels prevent the concrete from moving up and down, creating problems with your flooring. It is advised that you place the wirings in a protective pipe or tube together with the rough in. Roughin plumbing for a bathroom toiet, tub, sink drain and ejection pump basin has. The existing floor is 3 to 4 depending on the spot.
You can repair a concrete floor by cleaning and straightening the damaged area, and then filling it with mortar. Plumbing in concrete slab benjamin franklin plumbing. During the initial building of a home that has a concrete slab foundation and basement level. Patching concrete floor after rough plumbing terry love. This project guide offers steps and instructions on how you can repair those small cracks and crumbles yourself using just a few common masonry tools and a little bit of time. After the primer has cured, mix the compound and spread it onto the floor up to 12 inch thickwith a floor squeegee. Feb 14, 2019 checking the plumbing layout in a concrete slab before it is poured is. You have to prep the edges correctly and use the right materials. Why acid etching is no longer recommended as a concr ete prep method by sophia daukus on february 7th, 2018 in environment regs, installation, technical the longevity of a coating partly depends on how well it adheres to the surface of the concrete. I used a scraper and lightly hammered any spots that sounded hollow underneath to loosen any weak pieces. Follow this stepbystep guide for sealing your surface. How to backfill after laying waste lines under basement floor be sure to tamp it down if you use existing dirt, no need in having your new concrete floor cracking prematurely. If you have concerns about the state of repair of under slab plumbing or have.
How to repair a hole in the floor of a slab foundation home guides. Rough in plumbing 24 days if you have a basement with plumbing or if you are building the house on a concrete slab as opposed to wooden floor joists, once the foundation is in and backfilled and tamped packed down, and the soil treated, your plumber needs to install the sewer line and the water pipes that will be under the concrete. In this video you can see where we filled in the concrete flooring that. Installing below grade basement bathroom and kithenette must. How to patch and level a concrete subfloor pretty handy girl. Im not sure whether this is the appropriate newsgroup to post this question, but i would appreciate any pointers or suggestions. How to rough plumb a basement bathroom with pictures. Plumbing is one of the roughin elements of construction and is generally hidden by the finished elements such as walls, floors and roofs. Building and plumbing a house takes skill, perseverance, precision and aptitude. Need recommendations to fix newly but poorly finished.
Depending on your concrete slab design and specification, shovel granular fill such as crusher dust or compressable sand onto the slab pad to the required height and screed it level. Apply the concrete repair sealant to the affected area and smooth over with a putty knife. This is when the plumbing contractor puts the pipes in place, prior to the cement being poured. Removing the existing plumbing leaves holes in the. The plumbing system build starts with a concrete slab plumbing rough in. Mix concrete and pour into the hole, backing it under the undercut and ensuring no voids exist. 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. The period for completing the entire rough in plumbing procedure usually takes two to four days depending on the complexity of your plumbing needs. After the drain relocation was done i put the sand back in, compacted it and. Installation schedule of subrough plumbing and hvac. Many remodel projects in homes with a concrete foundation and slab call for moving plumbing fixtures, such as toilets, sinks and floor drains.
Opening s in concrete floor slabs buildings if you took an advanced concrete design course, you probably had a good introduction to the design of twoway slabs. Surface repair options for concrete floors and subfloors. Patch and level a concrete subfloor preparing the concrete floor. Then, begin in the opposite corner and work to the middle again. How to backfill after laying waste lines under basement floor. We started and finished the rough in of the upstairs pex supply lines. Often the hardest part about plumbing is the rough in. Bathroom plumbing diagram concrete slab plumbing installation. Keep adding sand until it matches just below the bottom of the existing slab. Remove the chipping debris and brush the rough edges of the concrete with a wire brush.
For a bathroom floor repair, either concrete will perform just as well as the other. After you properly finish and wrap your plumbing connection is it permitted, will you have a city inspector sign it off. You need to be sure the dirt is close to optimum moisture as you put it back. Im pouring concrete over rough plumbing as pictured. There are generally accepted plumbing rough in measurements for sinks, toilets, and tubshowers. Holes 1 inch or deeper require a concrete mix with coarse, crushedstone aggregate, which bonds well with existing concrete. The last step of connecting the sink, toilet, or tub is almost superfluous. Most compounds require that you first coat the floor with a primer. Saturate the concrete with water and then use a broom to push out any puddles from the pitted areas or low spots.
These watery repair materials are superb for narrow cracks as they conform to the crack. The client wants the overlay to be the finished product with 4foot squares cut in the floor for a pattern. For the back fill, you dont need to take out concrete rubble or rocks less than about 112inches in size. Below are a some under slab plumbing diagrams that are relatively common. We are going to do a 2inch overlay on an existing concrete floor. Rough in plumbing goes beneath the concrete structure or slab where there are wires attached thereto. Plumbing systems in concrete slabs go in before the concrete is poured, as they are installed beneath the slab. Like other repair treatments, selfleveling concrete can be colored with tints during the initial mixing, or the treatment can be colored after it is applied and cured, using dyes. Building the house step by step foundations roughin.
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