
Concrete Pool Repair in 6 Steps
- Remove Damaged Substrate. Remove any of the substrate or surface material, including patching or foreign materials. ...
- Find Hollow Spots. Although you will be able to easily spot cracks in the pool's surface, it may not be as easy to identify spots where the ...
- Clean the Substrate Surface. ...
- Fill Cracks and Depressions. ...
- Apply a Fill Mixture. ...
How do you fix a cracked swimming pool?
When patching, you’re encouraged to drain your pool below your target repair area and remove any loose cement on the surface of your pool floor. Once the plaster is mixed to your preferred density for patching, you can apply it to any cracks you might see.
How to repair plaster in an empty pool?
Repairing Plaster In an Empty Pool 1 Preparing Your Pool. The first step is to drain your pool if there’s any water left in it. ... 2 Before You Plaster. Before you add a new layer of plaster, you need to use your chemicals to remove the old plaster application. 3 Applying Your Plaster. ... 4 Adding the Finishing Touches. ...
How do you use vermiculite to repair a pool floor?
Pour one part of vermiculite powder and three parts of cement into a five-gallon bucket. Slowly add water to the mixture until you achieve a thick mud-like consistency. Gather some vermiculite onto a trowel, and place it onto the damaged section of the pool floor.
Is it easy to repair a concrete pool?
But, with the proper tools and materials, you'll find that concrete pool repair can be easy if you use the six steps as described below. Remove any of the substrate or surface material, including patching or foreign materials.

How do I repair my pool floor?
1:544:10How to Fix a Hole in Vinyl Swimming Pool Liner Underwater RepairYouTubeStart of suggested clipEnd of suggested clipWith your patch cut apply bonding cement to the underneath side of the patch. And lightly fold inMoreWith your patch cut apply bonding cement to the underneath side of the patch. And lightly fold in half so the glue is on the inside. Be sure to use a liberal amount of glue.
How do you fix the bottom of a pool with water in it?
Pool Leak RepairGive the area around the leak a thorough cleaning.Cut a patch from your leak repair kit. ... On a smooth surface, place the patch and spread the waterproof epoxy or cement on the patch's underside.Fold the patch, put it underwater and into the location of the leak.Press the patch over the leak.More items...
What is the bottom of an inground pool made of?
The two most common materials for the bottom of your pool are vermiculite and grout. Whichever material you choose, you'll apply it right on top of the soil with a round-edged pool trowel, and then the liner goes on top of it.
How do you fix a crack in an inground pool?
First, drain the pool until it reaches the level below the cracked area. Next, sand the cracked area and cut around the crack with a diamond-bladed saw. Fill the crack with hydraulic cement if it is leaking water. Next, apply the bond coat, followed by the mixed polyester putty.
Can you patch a pool without draining it?
1:334:03Pool leak repair without draining your pool DIY - YouTubeYouTubeStart of suggested clipEnd of suggested clipThen you can still use this just make sure you're in covering the entire rip. The other thing youMoreThen you can still use this just make sure you're in covering the entire rip. The other thing you need is something soft put on top of the patch after. This is if it's at the bottom of your pool.
Does Flex Seal liquid work on pools?
It's inconvenient and pool liners can cost hundreds (sometimes thousands) of dollars to replace. That's why we recommend keeping Flex Tape or our Pool patch and repair kit nearby. The next time you find yourself with this problem, just use Flex Tape and your pool leak will be repaired in a matter of minutes.
What is the best flooring for pools?
The Best Types of Flooring for a Room Next to a PoolNon-Slip Carpet. One of the easiest and most affordable options to install is non-slip carpet. ... Vinyl Flooring. When it comes to flooring that's water resistant, vinyl flooring is one of the best options because it withstands water wonderfully. ... Ceramic & Stone Tiles.
What is the best bottom for a pool?
A concrete pool floor is the best pool bottom you can get and the only way a top inground pool builder will build.
What is the pool floor called?
Vinyl. A vinyl liner is a common pool bottom option. Vinyl liners cover the entire pool in a single solid piece, so there are no cracks or seams that could result in leakage. They are less expensive than tile, fiberglass or concrete flooring alternatives.
Can a cracked swimming pool be repaired?
Cracks in a gunite or concrete pool can conjure up all sorts of fears of much worse things. In most cases, pool cracks do not continue to crack, and can be permanently repaired.
How do you fix structural cracks in pool?
You'll have a few options when it comes to fixing structural cracks in a concrete pool shell:Inject epoxy or polyurethane into the crack to seal it off.Apply hydraulic cement over the crack.“Staple” the crack closed with rebar staples.Tear out and redo the damaged area of the pool.
Can you fix a crack in a concrete pool?
0:006:52How to repair cracks in concrete pools. - YouTubeYouTubeStart of suggested clipEnd of suggested clipConcrete and ground movement sometimes do not mix especially in the case of a swimming pool a poolMoreConcrete and ground movement sometimes do not mix especially in the case of a swimming pool a pool can crack under the conditions of ground movement due to different types of soils lack of moisture
How long does a PVC pool drain last?
Main Drains are rarely defective, even after many years, but if yours has become worrisome, or you want to upgrade to a safer dual main drain system, it’s doable! PVC pipes can last over 50 years underground, but some pool kits built with black poly pipe, or with Flexible PVC pipe, may need plumbing repairs sooner.
How long does a pool liner last?
There comes a time in every pool’s lifespan where a renovation becomes necessary. The vinyl liner will deteriorate every 15 years or so, but other problems with the coping, steps, walls or floors may develop over longer stretches of time.
Can you replace coping on a vinyl pool?
For the type of vinyl pool coping that the pool deck is poured into , you’ll have to replace the pool deck to replace the pool coping. But once that is done, you can install a new liner track in a flat style that will allow for brick or paver coping. Snap Strip coping shown here, can be purchased by special order for pool renovation, or can be replaced with a flat track style that will allow brick or paver coping.
Do pool skimmers need replacement?
Pool skimmers and main drains do not commonly need replacement , but if a skimmer has been leaking for years, and rusted the wall beneath, a panel (and skimmer) replacement may be in order. Adding a second skimmer is a worthy upgrade that helps keep your pool much cleaner. Main Drains are rarely defective, even after many years, but if yours has become worrisome, or you want to upgrade to a safer dual main drain system, it’s doable! PVC pipes can last over 50 years underground, but some pool kits built with black poly pipe, or with Flexible PVC pipe, may need plumbing repairs sooner.
Can you install a liner track in a flat style?
But once that is done, you can install a new liner track in a flat style that will allow for brick or paver coping. Snap Strip coping shown here, can be purchased by special order for pool renovation, or can be replaced with a flat track style that will allow brick or paver coping.
Can you add tanning benches to a vinyl pool?
Many vinyl pool renovations are now adding a tanning bench , or internal step and bench sections, or a swim out aka love seat, in the deep end areas. Adding new step sections, spas or tanning benches will definitely qualify as a nice renovation project!
Can you replace a wall in a pool from 1967?
It’s rare to have to replace walls , but if your pool from 1967 was built with wood walls, or your galvanized steel walls from 1973 are bulging or rusting through, there are some pool wall repairs in order. Wooden wall replacement can be done for a single panel, but for an entire pool, it’s best to rip everything out.
What is the second stage of a pool?
The second stage of the two stage pool bottom is to add a smooth layer overtop of the rough floated structural layer. A two stage bottom can be rough concrete covered by a smooth grout layer, but also can be completed by using a vermiculite mix for the second stage.
What is a 2 stage bottom?
A two stage bottom, exactly as it sounds, is a pool floor that is completed in two separate stage s. The first stage is a very rough (usually raked or floated) concrete layer that is added to the entire floor of the pool, usually at the same time the collar is poured around the outside wall footings and buttresses.
What is the biggest mistake people make when patching pool floors?
The biggest mistake that people make when patching pool floors, other than to use the wrong patch material, is to forget to bond the new concrete to the old concrete. The old concrete needs to be clean and damp and you need to add a bonding layer between the new concrete patch and the old concrete.
What is vermiculite in pool?
Vermiculite is a natural mineral that when used as a mortar aggregate in place of sand, increases the thermal resistance of the concrete greatly. The vermiculite also provides a somewhat cushioned finish to the concrete which is excellent for liner longevity versus a rougher grout bottom finish. While vermiculite does have some advantages, it is considered an optional upgrade with most installers and costs more than a grout bottom. For this reason vermiculite bottom pools are fairly rare when compared to the other two.
How to tell if a pool has sand?
You can also sometimes tell if you have a sand bottom pool just from standing in the pool (even when it is full of water) as you can feel the flooring give underneath of your heels. Vermiculite Bottom - A vermiculite bottom pool is a mortar mix that uses some sand, and some vermiculite as the aggregates.
What is the lowest floor in a swimming pool?
In order to determine which type of floor that you have you need to know what the potential flooring options are: Sand Bottom - Sand bottom swimming pools are the lowest end floor option in swimming pools. For this reason they are popular for most aboveground swimming pools and budget inground pool installations.
What is grout bottom?
Grout bottoms are the most common used in inground vinyl liner pool construction.
How long does it take for plaster to dry?
This will allow you to later apply plaster without creating uneven places on the surface. When finished with the caulking, let it dry for 24 hours.
How to make a cement sand mix?
Apply a mixture of white concrete, white sand, acrylic cement bonding agent, and enough water to create a mixture as thick as a thin putty. With your trowel, force the mixture into all divots, holes, and corners, being careful to force out any air bubbles. Use your trowel to smooth the mixture over the surface until the surface is level and smooth. Wait until the mixture has begun to set up, about 15 minutes, before smoothing the surface again with your trowel.
Is it safe to work with acid?
Warning: Working with acid is dangerous if the proper safety precautions are not taken. Read the product’s directions thoroughly and wear rubber gloves, boots, splash-safe eye goggles, and an approved respirator for acid fumes. Also, note that you should never add water to an acid; always add acid to water.
What does it mean when a pool leaks?
If it leaks only when the system is running, that likely indicates a plumbing leak. However if the pool leaks all the time, it's more likely to be a leak in the liner. Advertisement.
How to check if pool is leaking?
Fill a bucket with water and mark the level. Mark the water level in your pool and leave the bucket beside the pool for a day. If you don't have a leak, the levels should have gone down the same amount. If the pool has gone down more than the bucket, you have a leak. Small leaks underwater can be difficult to detect.
How to tell if a pool has a leak?
If the pool has gone down more than the bucket, you have a leak. Small leaks underwater can be difficult to detect. Using food color or the red phenol chemical in your water testing kit, squirt a little near where you suspect a hole. If there is a leak, you will see the colored water moving towards it.
What causes a cut in a pool liner?
Look near the water line. If you live in a cold weather area, ice breaking up in the spring could cause a cut in the liner. An animal falling into the pool then clawing at the walls could also cause a cut in the liner.
How much water should I add to my pool to prevent leaks?
Adding water constantly to your pool is a good indicator that you have a leak. A good rule of thumb is, if you need to add 2 inches or more a week, you probably have a leak.
Can a vinyl pool liner leak?
A leaking swimming pool bottom is most likely going to happen with a vinyl-lined pool. It would take something pretty dramatic to cause a concrete pool to crack and leak at the bottom, whereas a vinyl pool liner over time will dry out, become brittle and be more susceptible to cracks.
Can you drain a pool liner?
If you find that you have a leak in your pool liner, don't drain the water from your pool. A vinyl pool liner is held in place by the water pressure in the pool. If you remove the water, the liner could slip.
What is vermiculite used for?
Vermiculite is a mineral often mixed with concrete and used in the construction of pool bases and other building projects requiring a solid floor. It can also be used to soundproof rooms as well as be added to potting soil.
How to get rid of vermiculite in pool?
Sweep the entire pool floor with a broom to remove all dirt, debris and smaller pieces of vermiculite. Pour one part of vermiculite powder and three parts of cement into a five-gallon bucket. Slowly add water to the mixture until you achieve a thick mud-like consistency.
How do I drain a pool?
Drain all the water out of the pool by placing a submersible pump into the deepest end of the pool and turning it on. Drain the pool water into the sewer line, which is usually located in the front yard of a home and has a square plastic cap on top. Use a wrench to open the cap, and attach the hose from the submersible pump to the pipe.
Why is my pool base cracked?
Vermiculite pool bases can become cracked and damaged over time, which is usually caused by a puncture from inside the pool. Repairing minor cracks and gouges in a vermiculite pool base can be done at home without professional assistance.
Where can I rent a submersible pump?
You can rent submersible pumps at home improvement stores. You will need to purchase a new pool liner rather than re-installing the old one. If you are replacing the entire vermiculite base, rent a concrete mixer from a home improvement store, or consider hiring a pool professional to do the job. Vermiculite is a mineral often mixed ...
How to fix a small hole in plaster?
If you’re repairing a small hole, roll the plaster into a ball. Once you’ve molded your plaster, press it down into the cracks or holes. After pressing down your material, take a trowel and smooth out the top of the mix and fill in the surrounding spots of your repairs.
What color is plaster pool?
Stains. Most plaster pools are lightly colored like blue, white or gray. Discoloration or a “bleached out” look is common due to sun exposure or areas of heavy use like the stairs. While the discoloration doesn’t necessarily indicate an issue, it may be time to repair if you want even color. Stains are also common and minerals like copper, calcium, ...
Why is my pool plaster peeling?
Peeling. If your pool has a low pH or calcium level, it dissolves the plaster’s material, and it’s more difficult to fix. Pay close attention to your chemical levels to prevent this damage. As soon as you notice peeling, it’s time to take action.
Why is my pool water rough?
Not only is it annoying to walk across rough patches of plaster, but some spots can become sharp and cause injuries. Every pool owner knows the importance of well-balanced pool water chemistry, but excessive roughness is often related to an imbalance in the water.
How long does it take to plaster a pool?
Depending on how much of your pool you need to repair, the prepping process can take a long time and might span into a few days or a few weekends if you are a “DIY Weekend Warrior.”. Once the pool is prepped it’s time to mix up your plaster.
Can you repair plaster in an inground pool?
Fortunately, repairing the plaster in your pool doesn’t have to be complicated.
Do pool owners do their own maintenance?
Many pool owners do their own pool maintenance, which includes bigger tasks like repairing plaster. Like any DIY project, you want to make sure you have a plan, all the tools you need, and fully understand the process before you jump in and start making repairs.
How thick is pool plaster?
New pool plaster will also hide cracks or chips, or cover rough and stained plaster with a soft new coat of plaster, about 3/8” thick, right on top of the old plaster. Here are the steps involved in inground pool plaster replacement – but I do not recommend this as a DIY project.
How to get rid of hollow spots in pool?
Drag the floor of the pool with a heavy chain and listen for hollow spots, or tap the pool floor with a wooden pole, or listen for a hollow sound while spraying the pool with a strong stream of water. Chip up any delaminated areas, wearing gloves and eye protection. 2.
How to fix cracks in plaster?
For a plaster crack, or around skimmers, roll into a ‘snake’, and push into the crack, smoothing out the edges with your fingers. 4. For a Fast Set plaster mix patch, mix the material on the dry side, and roll into a ball shape. Quickly take the patch ball underwater and push into place with a trowel.
How to repair cracks in pool plaster?
Use a mask or goggles to see clearly underwater. 1. First, open the crack a bit by raking a flathead screwdriver down the crack or around the edge of the area to be patched.
How to keep plaster from drying out?
If the pool plaster repair won’t be under water for more than a few hours, cover it with a moist towel or blanket to keep the patch from drying out before the pool repair is covered with water. This will prevent shrink cracking of the plaster patch from drying too fast. 7.
What is a crack in a concrete pool called?
Cracking, hollow spots, sometimes called “pop-offs”, and chipping are not uncommon. Plastered pools also experience worn areas that can become severe, with the gunite below the plaster is showing. Pool plaster is not structural, but is the waterproofing membrane over top of the porous concrete pool shell.
How long does it take for a fiberglass pool to fade?
A fiberglass pool shell begins to look faded and tired after many years. If there are also cracks or surface imperfections, you may wonder what options exist to refurbish the surface and restore the original luster.

Step 1 – Remove Damaged Substrate
Step 2 – Find Hollow Spots
- Although you will be able to easily spot cracks in the pool's surface, it may not be as easy to identify spots where the outer plaster has separated from the shotcrete or gunite beneath it. If these spots exist, they will most likely separate completely over time. It is best for you to repair these potential trouble spots while you are repairing your pool's surface. You can easily identify t…
Step 3 – Clean The Substrate Surface
- Clean all dust, grit, and concrete pieces off the surface you are repairing. Then cover the surface with an acid rinse. Warning:Working with acid is dangerous if the proper safety precautions are not taken. Read the product’s directions thoroughly and wear rubber gloves, boots, splash-safe eye goggles, and an approved respirator for acid fumes. Also, note that you should never add wa…
Step 4 – Fill Cracks and Depressions
- Fill the crack with caulk, leaving a space of ¼ inch between the caulk and the top of the crack. This will allow you to later apply plaster without creating uneven places on the surface. When finished with the caulking, let it dry for 24 hours.
Step 5 – Apply A Fill Mixture
- Apply a mixture of white concrete, white sand, acrylic cement bonding agent, and enough water to create a mixture as thick as a thin putty. With your trowel, force the mixture into all divots, holes, and corners, being careful to force out any air bubbles. Use your trowel to smooth the mixture over the surface until the surface is level and smooth. Wait until the mixture has begun to set up…
Step 6 – Texture The Surface
- If the old surface has a texture that is rougher than your newly patched area, you will want to match the textures while your newly patched spot is still wet. You can do this by texturing the area with a damp sponge. Now that you have repaired your pool surface, you should fill it with water right away. If you expect a delay in filling your pool, spread wet towels over the just-repaired surf…