Installing a new ground pool in your backyard is an excellent way to optimize your space for outdoor fun and relaxation. But good groundwork is needed to keep your pool in good condition for a long time. Using a tarp underneath your pool can help protect it from damage and wear and tear and provide extra cushioning.
This article will discuss the most critical things tarps can provide and a step-by-step procedure to get the best tarp possible for your ground pool. We’ll also cover some best practices for installing and maintaining tarps and some of the best tarps on the market. Ultimately, you will understand how to make the best-informed decisions when keeping your pool in good condition for as long as possible.
Why Should You Install a Tarp Under Your Ground Pool?

A tarp placed under a ground pool has multiple advantages. It protects the liner from sharp elements, surfaces, and moisture that cause excessive wear and tear. The tarp further minimizes the ground moisture, thus lowering the chances of algae growth while increasing the pool’s longevity. The tarp also strengthens the liner and acts as a protective barrier that prevents abrasions and punctures. Most importantly, it keeps the area around the pool base clean, making maintenance much more manageable.
How a Ground Cloth Protects Your Pool Liner
A ground cloth under the pool liner has various uses. It protects the liner from damage by providing a shield against sharp surfaces and any harmful elements. A ground cloth helps prolong my pool`s lifespan by preventing punctures or abrasions. The ground cloth also contains the moisture that seeps into the pool, avoiding moisture-related problems such as algae growth. Cleaning becomes much more manageable since dirt cannot collect around the pool.
Preventing Punctures and Extending Pool Life
Employing a sturdy pool liner and a pool pad has made it simple to avoid punctures and extend my pool’s lifespan. In my experience, these methods, in combination, have worked the best. Pads primarily serve as a protective blanket between the bottom of the pool and the ground. This prevents sharp objects and harsh surfaces from damaging the liner. I also ensure that the area beneath my pool is debris-free and check the liner occasionally for damages. Cumulatively, all of these steps have helped me keep my pool in good condition, which has ultimately helped avoid expensive repairs. It’s doable with a bit of time and focus. Despite the ease of implementation, this strategy has proven helpful countless times for various users.
Dealing with Uneven Ground Surfaces
Improperly leveled ground and surrounding surfaces can lead to a dip or a rise forming in the water level, which can easily damage your pool. However, if you fix the problem correctly, it becomes permanent. The first step is locating where the problem areas are. It is easiest to do it using a level or a long straightedge. Depending on your issue, if the problem is mild or less than an inch, you can use sand to fill the area. If the issue is worse than that, further digging paired with replanning may be the best course of action.
It may be worth considering using a groundbreaking tool, or even a hired laborer, to facilitate the finer surface details when it is difficult to manage. If no consideration is given to thoroughly compacting the soil with a plate compactor or tamper, settling may occur over time. For additional protection, while allowing for a surface with slight imperfections caused by leveling, installing a pool pad or foam underlayment during the initial stages of pool installation proves beneficial.
About the specific parameters, you should keep in mind that the area within the pool’s radius should be leveled to an accuracy of one inch for height discrepancies. Depending on how steep the yard is, you might have to construct a backfill-grade retaining wall or some other apparatus in unison with bank filling and grading to achieve the desired flat area. These steps ensure that your pool achieves or surpasses the standard without causing any damage.
What Are the Best Tarps for Under Your Swimming Pool?

Durability and size are two essential qualities of a swimming pool tarp. Heavy-duty polyethylene or vinyl tarps resist tearing and can be wet for extended periods, a vital material quality. Durability is also essential for the tarp’s width and length, as it must be larger than the pool’s base while being rigid enough to support the structure’s weight without collapsing. Another good option is UV-resistant tarps, which, as the name implies, endure sunlight without degradation. Popular choices include multi-purpose poly tarps, reinforced pads for pools, or even ground cloths designed for above-ground pools. These options provide a firm surface while shielding the pool liner from destruction by sharp objects or dirt.
Heavy-Duty Tarps vs Regular Poly Tarps
Heavy-duty and standard poly tarps differ significantly in longevity, construction, and functional application. Heavy-duty tarps are constructed to endure incredibly grueling circumstances and often have higher material thicknesses, reinforced edges, and more availability for tear, UV ray, and weather resistance. Such tarps possess an average thickness of 10 to 15 mils, heightened weave count (for example, over 14 x 14), and grommets of 18 to 36 inches spacing for secure binding.
Unlike heavy-duty tarps, standard poly tarps are lightweight and designed for casual use. They possess a thickness of 5 to 8 mils, a low weave count (for example, 8 x 8 or 10 x 10), and optional grommets with spacing of 24 to 36 inches. Regular poly tarps are, by definition, more economical, but they do not prove sufficient for harsh outdoor climates.
Typically, heavy-duty tarps are advocated for the intended use of above-ground pools due to the long-lasting protection they provide and stability for areas that experience extreme weather or debris.
UV-Resistant Options for Longer Durability
UV-resistant tarps are designed to last when subjected to prolonged solar exposure, making them perfect for outdoor uses where strength matters. These tarps are constructed with polyethylene and vinyl fabrics, incorporating UV inhibitors to protect against degradation from ultraviolet rays. Look for added strength with a thickness ranging from 10-20 mils, lower wear with weave counts between 12×12 to 14×14, and heat-sealed seams that reduce fraying over time. Lifting such tarps is effortless due to reinforced edges and grommets placed for easy fastening in high-stress environments 18-36 inches apart. For enhanced durability, many of these tarps are resistant to UV rays and mildew, water, and high temperatures, making them versatile for agricultural, construction, and recreational use.
Specialized Pool Ground Mats and Their Benefits
The customized mats designed for pool areas provide the necessary convenience and protection for your specialized swimming pool. These mats eliminate the possibility of damage from sharp objects, debris, or any rough surfaces, which helps prolong the life of your pool. Apart from this, they help improve comfort by providing a smoother base and have some materials that help prevent mold and mildew formation. These mats also enhance insulation, retain heat, and save energy. With all these mats’ advantages, they are worth the investment.
How to Properly Install a Tarp Under Your Pool

- Prepare the Ground: First, clear where you will put the pool. Remove any rocks, roots, or other debris that could compromise the pool’s liner. Ensure the ground is flat and level to avoid uneven pressure on the pool’s walls.
- Lay the Tarp: Grab it and spread it over the prepared ground. If you intend to protect the base entirely, ensure the edges of the tarp overlap the base of the pool. Remove any creases to ensure a smooth surface.
- Secure the Tarp: In windy regions, secure it with appropriate weights or pegs to prevent it from moving around. This ensures the tarp does not shift while the pool is filled or installed, making it easier to fill it with water.
- Inspect Before Setup: Before proceeding with the setup, inspect the tarp for tears or misplaced parts. Correct problems before placing the pool on top of the tarp.
These steps create an additional protective layer that helps enhance the pool’s durability.
Step-by-Step Installation Process
Step 1: Determine the Surface Selection
Select a flat and level surface shielded from sharp objects, tree roots, and slopes so that the pool does not tilt and lean or, worse, get damaged.
Step 2: Area Cleaning
Remove sharp objects, rocks, debris, and everything else that might damage the tarp and pool liner later.
Step 3: Tarp Installation
Lay the tarp out to cover the base area of the pool to ensure that the liner is protected and does not sustain unnecessary damage.
Step 4: Tarp Fixation
Use the stretches, weights, or other suitably designed mouthpieces to hold the tarp in its proper place so that the will does not move.
Adhering to those guidelines will prepare the ground for a successful pool setup.
Tools and Materials You’ll Need
To properly level the base for your pool and allow for easier installation, the following tools and materials are required:
- Measuring Tape (to measure the dimensions of the pool)
- Shovel (to cut grass, remove rocks, and level the proposed area)
- Rake (to smoothen the rough edges)
- Wheel Barrow (to carry soil, sand, or other materials)
- Leveling tool (bubble or laser level to make sure the base chosen is flat)
- Sand or pool base material (fine sand or pad to level and safeguard the pool base).
- Tarp (to use as extra protection below the pool liner)
- Stakes or Weights (to hold the tarp down)
- A tamper or an excavator (both are used while compressing and leveling the soil or base material)
- Garden hose with a spray nozzle (for wetting the soil or sand before using a compactor)
These are pretty useful as long as you check the dimensions of your pool. Remember to adjust the quantity of materials accordingly. For example, in the case of the tarp and base materials, they should have an area that covers the pool area plus an extra buffer of 1-2 feet. The goal here is that the area inside the perimeter of the level ground should be 1 inch around the entire work area.
Common Installation Mistakes to Avoid
Whenever I am dealing with installing an above-ground pool, there are a few common mistakes I always try to avoid so that the pool is nicely fitted. First, I make sure always to level the ground. Without it, structural issues and an unsafe pool setup are possible. Second. The materials I use are always thick and adequate. Bool liners are mandatory, and there is no way thin materials will suffice. Finally, I make sure not to rush the compaction process. Everything from the filler soil to the sand baseline must settle down first. Otherwise, the structure is bound to fail. The right tools combined with ample time make the difference here.
Do Different Pool Types Require Different Tarps?

While installing pools, the pump design and size variation are all factors that influence the selection of tarps. Above-ground pools are generally the largest, so they need heavy-duty tarps to anchor themselves securely, whereas kiddie and smaller inflatable pools require lightweight essential tarps. The differences do not just end there; the material varies as much as the types of pools do. For instance, thicker puncture-resistant tarps will be needed for vinyl-lined pools. More simplistic will suffice while temporary pools are being used.
Intex and Inflatable Top Ring Swimming Pools
I suggest using high-quality, fully tarped, waterproof tarps and secured with reliable tie-downs for Intex pools and inflatable top ring pools. Since these pools are lightweight and vulnerable, a tarp made from puncture-resistant material is a must. A thicker vinyl tarp is ideal as it protects the pool from debris, ultraviolet rays, and even possible puncturing. To maximize ease of use, choose a tarp that is a size or two more significant than the pool’s diameter to cover the pool adequately. Also, the tarp should be easily collapsible and deployable, which is a must for these temporary pools.
Frame Above Ground Pools
Frame above-ground pools are a standard and reliable option for a backyard pool. The pool is stable and long-lasting due to the sturdy metal frame built from galvanized steel or aluminum. The pool walls are constructed of multi-layered PVC or resin, which is specially designed to withstand punctures, UV damage, and chemical exposure.
When selecting a frame pool, some design factors, such as size, shape, and capacity, must be considered. Frame pools come in all shapes, including round, oval, or rectangular, and range in size from small 10-foot pools to larger 32-foot pools, which hold anywhere from 1,000 to over 15,000 gallons of water. Make sure the frame pool’s diameter and depth meet the restrictions of your yard and are suitable for intended purposes, whether casual swimming or recreation for families with kids.
Preparations and Maintenance
In contrast to other types of pools, frame pools are the easiest to set up and only require 1–2 people for 2–4 hours to assemble, depending on the complexity of the task. To stabilize the pool, a flat surface free of debris is essential. Numerous accessories like ladders, ground cloths, pumps, and even pool covers come with many of these pools. To ensure water cleanliness and circulation, check that the filtration system provided is adequately rated for the pool size. For example:
- If the pool is below 10,000 gallons, use a Filter and pump with a flow rate of 1,000–1,500 GPH.
- If the pool is over 10,000 gallons, use a Filter and pump with a flow rate of 2,500–3,000 GPH.
To check for cleanliness, regularly ensure no excess debris in the pool, the filters are clean, chlorine levels are tested (1–3 ppm), and the water pH level is maintained (ideal range 7.2–7.8).
Important Considerations
- For frame pools, ensure the coating is resistant to rust and corrosion for extended durability.
- Liners need to be reinforced to be more resistant to tears and leaks.
- Most frame pools have warranty terms of 1–3 years, which vary. Make sure to note this when purchasing.
A frame above-ground pool can provide years of use and relaxation if it is researched thoroughly and ensures proper installation.
Specialized Options for Various Pool Sizes
Several manufacturers cater to specialized options for different pool sizes very well. Small models that occupy little space are ideal for compact pools due to their ease of setup and durability. Family pools are medium-sized and have additional features such as improved ladder access and enhanced filtration systems. The large variety of pools comes with a reinforced frame and advanced liner, ensuring stability and long-term use. These options ensure space and requirement-specific flexibility, functionality, and quality all at the same time.
What Size Tarp Do You Need for Your Pool?

Begin by calculating the area of your rectangular pool by determining its length, width, and depth. For round pools, measure the diameter. To effectively secure the pool, choose a tarp that is at least two to three feet larger than all edges. The added tarp material protects the pool from debris and achieves optimal protection.
Calculating the Right Dimensions
In addition, to determine the correct tarp size for a rectangular pool, the first step would be measuring its length, width, and depth. For a round pool, the only measurement needed is the diameter, but the resulting tarp will still need to be two to three feet larger than the pool’s diameter for optimal coverage. This ensures that the pool will be adequately covered and well protected.
Should the Tarp Be Larger Than Your Pool?
Indeed, the tarp must surpass the dimensions of the pool. Ideally, the tarp should overlap the pool’s size by 2 to 3 feet on all sides. This prevents debris from entering the pool, lessens the chance of the tarp moving around, and makes it snug when fastened. For instance:
- For rectangular pools: Increase the width and length of the pool by 2 to 3 feet.
- For round pools: Increase the diameter by 2 to 3 feet.
Doing this ensures that weights, bungee cords, or tie-downs can be used to secure the tarp, providing long-lasting protection.
How to Maintain Your Pool Ground Cloth

Maintaining your pool ground cloth is crucial for increasing its durability and usefulness. Regularly sweep or remove any leaves, dirt, or debris to clean the surface. Inspect the cloth for damages or tears after every use, and for small holes, use patch tape or pool adhesive to seal them off. Ensure heavy objects are not dragged across the cloth, which can cause unnecessary wear. Store the fabric in a dry, shaded area when the pool is unused to avoid moisture and UV damage. Following these steps, the ground cloth will be in excellent condition for many years.
Cleaning and Storage Tips
To maximize the lifespan of your pool ground cloth, best cleaning and storage practices include the following:
- Cleaning
- Remove loose dust, dirt, or leaves by vacuuming or using a soft-bristle broom before washing.
- Combine mild soap with warm water and scrub the surface with a sponge or soft brush.
- Using a garden hose, rinse the cloth and let it air dry.
- Harsh chemicals and pressure washers should not be used as these will damage the material.
- Repairing Damage
- Inspect the ground cloth regularly to check for small holes or tears.
- For any faults found, use a patch kit designed for vinyl or polyethylene material to cover holes or tears.
- Ensure the affected area is thoroughly clean and dry before applying the patch.
- Storage
- After washing and drying, store the ground cloth into neat piles, controlling for creases, as they weaken the cloth’s structural integrity.
- It protects the folded cloth from extreme temperatures, keeping it cool, dry, and shaded from direct sunlight.
- If the folded ground cloth is not used for an extended period, controlling moisture with silica gel or mold- and mildew-absorbing compounds will reduce the growth of mold and mildew.
These steps will ensure longevity for your pool ground cloth. Conduct routine inspections to keep the fabric durable and functional for many years.
When to Replace Your Tarp
You might want to consider replacing the tarp if the rips and holes on it become too numerous and complex to fix. If the tarp is starting to strip off its waterproof layer or the mold—and mildew-resistant surface is being exposed regardless of cleaning, you should probably consider getting a new tarp. Constantly checking your tarp over set periods allows you to catch these problems sooner and keeps the tarp functional longer.
Dealing with Tarp Damage
If my tarp sustains damage, the initial step I take is to evaluate the nature of the damage. After ensuring the surface is clean and dry, I shut them with a tarp repair tape or a patch kit for small rips or punctures. However, if the damage is more significant, I address large rips or panels torn to shreds or wholly broken by sewing them together using heavy-duty thread and then sealing them with waterproof glue. Regarding the technical details, I cover the patch areas with a receiving zone two inches bigger than the tear on every side and ensure all adhesives and patches are UV-resistant and compatible with my tarp material, whether polyethylene or vinyl. If the damage done is beyond what the tarp can handle regarding structural integrity or functionality, I eliminate it to avoid any potential issues. Such problems can be avoided through regular maintenance.
References
- The Best Tarps for Under Pools: Materials, Sizes, and Tips – A detailed guide on choosing the right tarp for pool bases.
- Above Ground Pool Ground Cloth vs Tarp? – A Reddit discussion comparing ground cloths and tarps for pools.
- 19 X 19 Ft Square Tarps Pad for Above Ground Pool – A product page with user reviews and details about a specific pool tarp.
Frequently Asked Questions (FAQ
Q: Why should I use a pool tarp or tarpaulin under my ground swimming pool?
A: A tarp or tarpaulin under your ground swimming pool serves multiple purposes. It provides a protective barrier between your pool liner and the ground, preventing punctures from rocks, roots, or sharp objects. A good pool tarp also helps to create a smooth surface for your pool bottom, extends the life of your swimming pool liner, and can provide additional insulation. Many pool owners find that using a heavy-duty tarp or specifically designed pool liner pad significantly reduces the risk of damage and can save money on repairs or replacements in the long run.
Q: What is the best type of tarp for ground pools?
A: The best type of tarp for ground pools is typically a heavy-duty pool ground tarp made from waterproof PE (polyethylene) material with UV-resistant properties. Look for tarps’ heavy-duty waterproof options specifically designed for pool use, as they tend to have reinforced edges and are thick enough to withstand the weight of water. A dedicated pool liner pad tarp is ideal, but a heavy-duty tarp with at least 5-6 mil thickness can work well if unavailable. For pool inflatable top ring swimming models, ensure the tarp extends slightly beyond your pool’s diameter to provide complete ground protection.
Q: How do I correctly install a pool mat or pool floor protection?
A: To install a pool mat or floor protection correctly, first clear the ground swimming pool area of all debris, rocks, sticks, and sharp objects. Level the ground as much as possible, removing significant bumps or depressions. Lay out your waterproof PE pool mat or tarp and smooth out any wrinkles. For round pools, center the mat protector pad and ensure it extends slightly beyond your perimeter. For square pool ground setups, align the tarp with your intended pool placement. Some pool owners add a thin layer of sand on top of the tarp for additional cushioning. Always install the tarp on dry ground to prevent mold growth underneath your pool bottom.
Q: Can I use a regular tarpaulin instead of a specific pool liner pad?
A: Yes, you can use a regular tarpaulin instead of a specific pool liner pad, but choosing the right kind is essential. Select a heavy-duty tarp that is waterproof, UV resistant, and thick enough (at least 5-6 mil) to provide adequate protection. Avoid mesh tarps as they won’t provide proper security. Canvas tarps can work but may deteriorate faster. The best substitute would be a heavy-duty polyethylene tarp with reinforced edges and grommets (though you won’t need the grommets for pool use). While a dedicated pool ground mat protector pad is optimal, a high-quality all-purpose tarp can be a cost-effective alternative for your pool bottom protection.
Q: How do I prevent wrinkles in my pool tarp that could damage my pool floor?
A: To prevent wrinkles in your pool tarp that could damage your pool floor, start by choosing a dry, windless day for installation. Clear and level the ground thoroughly before placing your tarp. Lay the tarp out flat and pull it tight from the center outward. Have someone help you hold different sections as you smooth it out. For persistent wrinkles, you can place small weights temporarily on the corners while you work on smoothing the center. Some pool owners use a push broom to smooth out wrinkles. For ground pool inflatable top ring models, fill the pool slowly with a few inches of water first, which helps weigh down the liner and naturally smooth out minor wrinkles in the tarp and pool liner.
Q: How large should my pool ground mat be compared to my pool size?
A: Your pool ground mat should be slightly larger than the footprint of your pool—ideally extending about 1-2 feet beyond the perimeter of your ground swimming pool. For round pool liner pad installations, if your pool is 12 feet in diameter, look for a tarp at least 14-16 feet across. This extra margin ensures complete protection of the pool area and accommodates any slight shifting during setup. This extra space is significant for frame above-ground pool inflatable models as it protects against rubbing at the edges. However, avoid using an excessively larger tarp than needed, as excess material can fold and create uneven surfaces or collect water between the ground and your pool bottom.
Q: Does the color of my pool tarp matter for UV protection?
A: Yes, the color of your pool tarp can impact UV protection and functionality. Darker tarps (blue, black, or green) typically offer better UV-resistant properties and can help prevent algae growth by blocking sunlight from reaching the ground beneath your pool. This is particularly important for waterproof PE pool mat installations that will remain in place for extended periods. However, lighter-colored tarps make spotting potential issues like sharp objects or uneven surfaces easier before setting up your pool. For maximum protection, look for tarps labeled as UV resistant, regardless of color. Many pool accessories manufacturers specifically make pool tarps in blue or black because these colors provide optimal protection for the longevity of the swimming pool liner.
Q: How can I maintain my pool liner pad tarp throughout the swimming season?
A: To maintain your pool liner pad tarp throughout the swimming season, periodically check for water accumulation between the ground and the tarp if you can see the edges. Keep the area around your pool clear of sharp debris that could blow under the edges and potentially damage the tarp. If you drain your pool for any reason, consider letting the tarp dry entirely before refilling to prevent mold growth. For pool inflatable top ring swimming models, be careful not to pull or tear the tarp when cleaning around the base. When the swimming season ends, if you’re dismantling your pool, wash the tarp thoroughly, allow it to dry completely, and store it flat in a dry place away from direct sunlight to preserve its waterproof and UV-resistant properties for the next season.