Setting up an inflatable pool on your concrete patio or driveway is a great way to cool off, but you need a protective layer. If you’re wondering exactly what to put under inflatable pool on concrete, you’re in the right place. Placing a protective layer under an inflatable pool on concrete prevents abrasion and helps insulate the water from the cold surface.
Without a proper ground cover, the rough concrete can wear down your pool’s vinyl floor, leading to leaks and a shorter lifespan. The cold concrete can also make the water uncomfortably chilly. The right materials create a barrier, providing comfort, safety, and durability for your summer fun.
This guide will walk you through all the best options, from budget-friendly picks to premium solutions. We’ll cover how to install them and what to absolutely avoid. Let’s get your pool set up for a safe and long-lasting season.
What To Put Under Inflatable Pool On Concrete
Choosing the correct underlayment is the most important step for your pool’s setup. The ideal material serves three key functions: it cushions, insulates, and protects. You need something that shields the pool vinyl from concrete’s abrasive texture, provides a softer surface for your feet, and adds a layer of thermal insulation.
Concrete might seem smooth, but it has microscopic roughness and often small cracks or pebbles that act like sandpaper on the pool floor under the weight of the water. A proper barrier stops this friction. It also keeps the water temperature more stable by blocking the cold that seeps up from the concrete slab.
Here are the top recommended materials to use under your inflatable pool on concrete, starting with the most effective and popular choice.
Interlocking Foam Tiles (EVA Foam Mats)
These are widely considered the best overall option for concrete surfaces. Interlocking foam tiles, often made from EVA foam, create a custom-sized, cushioned platform. They are soft, provide excellent insulation, and are very easy to install.
The interlocking design means you can build a pad that perfectly matches your pool’s dimensions. They offer a uniform surface that eliminates pressure points. Many are also moisture-resistant and provide a non-slip texture, adding to safety.
- Pros: Superior cushioning and insulation, easy to assemble and take apart, provides a uniform surface, often has drainage channels, can be used for other purposes after.
- Cons: Can be more expensive upfront than some options, may need to be weighted down initially as they can float if water gets underneath.
- Best For: Anyone seeking a premium, durable, and comfortable solution. Ideal for larger pools and for families who want the best protection.
Geotextile Ground Cloth (Landscaping Fabric)
This is a professional-grade barrier that is incredibly effective and affordable. Geotextile fabric is a thick, felt-like, non-woven material used in landscaping to suppress weeds. It is perfect for placing directly on concrete.
It is designed to be permeable, allowing water to drain through while providing a tough, protective layer. It won’t tear easily and creates a smooth buffer between the pool and the concrete. It’s one of the most recommended materials by pool manufacturers for hard surfaces.
- Pros: Excellent protection against abrasion, allows for water drainage, very affordable, easy to roll out and cut to size, durable and puncture-resistant.
- Cons: Provides minimal cushioning or insulation for your feet or the water temperature.
- Best For: Top priority on protecting the pool vinyl from punctures. A fantastic first layer that can be combined with a softer top layer.
Padded Pool Floor Liners
These are specialized products made specifically for this purpose. A padded pool floor is a tarp-like sheet with a layer of soft batting or foam fused between two durable layers. It’s an all-in-one solution.
They are designed to be waterproof and provide both padding and protection. You simply unroll it under your pool. They are more expensive but offer a clean, integrated look and feel.
- Pros: Purpose-built for pools, combines padding and protection in one product, often includes UV resistance, easy setup.
- Cons: Higher cost, can be bulky to store, may not provide as much insulation as thick foam tiles.
- Best For: Those who want a dedicated, no-fuss solution and are willing to invest in a specialized product.
Old Carpets Or Rugs
Using old carpets or large area rugs is a popular budget-friendly and recycling option. They provide decent cushioning and a thick barrier against the concrete. Ensure the carpet is clean and free of any debris, sharp objects, or loose threads that could cause damage.
Avoid carpets with rubber backings, as these can degrade and stick to both the concrete and the pool liner. Wool or synthetic pile carpets work best. This is a good way to repurpose something you already have.
- Pros: Very low cost (often free), good cushioning, provides some insulation, readily available.
- Cons: Can get heavy and soggy if water gets underneath, may mildew if not allowed to dry thoroughly, not a permanent solution.
- Best For: Temporary setups or as an extra layer of padding over another protective barrier like a tarp.
Tarps And Drop Cloths
A heavy-duty tarp is a common choice, but it must be used correctly. On its own, a basic plastic or polyethylene tarp offers almost no cushioning and can become slippery when wet, creating a hazard. It also provides no insulation.
However, a thick, woven polyethylene tarp can serve as a good moisture barrier. The key is to use it in combination with another material. For example, place a tarp down first to block moisture, then add foam tiles or a rug on top for comfort and protection.
- Pros: Inexpensive, good for blocking ground moisture, easy to find.
- Cons: Slippery and dangerous when wet, offers no padding or insulation, can tear easily on rough concrete.
- Best For: Use as a secondary moisture barrier underneath a primary cushioning layer. Never use a thin tarp alone.
Combination Approach (Layering)
For the ultimate protection and comfort, many experts recommend a layered approach. This method addresses all concerns: moisture, abrasion, cushioning, and insulation.
A typical and highly effective three-layer system would be:
- Base Layer (Moisture Barrier): A heavy-duty woven tarp or geotextile fabric laid directly on the concrete. This stops ground moisture and provides initial abrasion protection.
- Middle Layer (Insulation/Cushion): Interlocking foam tiles or old carpet. This layer provides the soft, warm surface for the pool and its users.
- Top Layer (Final Protection): A final sheet of geotextile fabric or a smooth pool floor liner. This creates a seamless, non-abrasive surface for the pool vinyl to rest on, preventing any snags from the middle layer.
What To Avoid Putting Under Your Inflatable Pool
Just as important as knowing what to use is knowing what not to use. Some common household materials can actually cause damage or create serious safety risks.
Thin Plastic Tarps Or Painter’s Drop Cloths
As mentioned, these are a major slipping hazard. When wet, they become extremely slick, making it dangerous to enter or exit the pool. They also puncture easily and provide no meaningful protection or warmth.
Blankets Or Towels
While soft, these materials are not designed for this purpose. They will compress to almost nothing under the weight of the water, offering zero protection. They also retain water and will quickly develop mildew and mold against the concrete.
Cardboard
Cardboard seems like a good idea because it’s thick and readily available. However, it disintegrates completely when wet. It will turn into a pulpy, messy layer that sticks to your pool and concrete, and provides no structural support or protection once saturated.
Sand Or Dirt
Never pour sand or dirt directly on concrete to create a soft base. This is counterproductive on a hard surface. The material will shift and create an uneven base, putting stress on the pool seams. It will also be incredibly messy and can scratch the pool liner as it shifts.
Nothing At All
This is the worst option. Placing your inflatable pool directly on concrete guarantees accelerated wear and tear. The constant friction will thin the vinyl, leading to leaks. The cold surface will make the water unpleasant. Always use a barrier.
Step-By-Step Installation Guide
Now that you’ve chosen your material, proper installation is key. Following these steps will ensure a secure, level, and safe setup for your pool.
Step 1: Prepare The Concrete Surface
Start with a clean, smooth base. Sweep the concrete area thoroughly to remove all dirt, pebbles, and debris. If there are any obvious sharp protrusions or cracks, consider filling them with a concrete patch compound and letting it cure. A clean surface prevents unseen damage to your underlayment and pool.
Step 2: Lay Your Base Protective Layer
If you are using a layered approach, start with your base moisture or abrasion barrier (e.g., geotextile fabric or heavy tarp). Unroll it and center it in your chosen spot. Smooth out any wrinkles or folds. If using multiple pieces, overlap them by at least 12 inches to ensure full coverage.
Step 3: Add Cushioning And Insulation
Next, add your cushioning layer. For foam tiles, interlock them tightly within the area of your base layer. For a carpet or rug, ensure it lies flat and its edges are smooth. The goal is a perfectly flat surface without bumps or gaps that could cause uneven pressure on the pool floor.
Step 4: Apply The Final Top Layer
Place your final protective sheet (if using one) over the cushioning layer. This is often another layer of geotextile fabric or the padded pool floor itself. This top sheet should be wrinkle-free and extend slightly beyond the area where the pool walls will sit.
Step 5: Position And Inflate The Pool
Carefully unfold your inflatable pool on top of the prepared surface. Gently maneuver it into its final position, trying not to drag it and shift the layers beneath. Begin inflation, following the manufacturer’s instructions. A properly supported pool will look even and stable as it fills.
Step 6: Fill With Water And Final Check
Start filling the pool with water. As it fills, walk around the perimeter and gently smooth out any remaining wrinkles in the pool liner from the inside. Check that the underlayment hasn’t shifted or bunched up at the edges. Once full, your pool should be sitting on a secure, protective base.
Additional Tips for Maintenance and Safety
Your job isn’t done once the pool is filled. Proper maintenance of the area under and around your pool extends the life of all your materials and ensures ongoing safety.
Regularly Check For Moisture Buildup
Even with a good setup, water can sometimes get between the layers from splashing or rain. Every few weeks, partially drain the pool so you can lift an edge and check underneath. Look for standing water, mildew, or unexpected wear. Allow the area to dry completely before repositioning the pool.
Secure The Edges
Wind can get under the edges of your protective layers and cause them to shift or blow. Use heavy, flat objects like pavers or sandbags to weigh down the exposed edges of your ground cloth or tarp. Place them just outside the pool’s footprint so they don’t create a bump under the pool wall.
Clean And Store Materials Properly Off-Season
At the end of the season, drain and dry your pool completely. Then, remove all the underlayment materials. Clean them according to their type—hose off foam tiles and tarps, shake out rugs, and let everything dry thoroughly before storing. This prevents mold and ensures they’re ready for next year.
Monitor Pool And Underlayment Condition
Throughout the season, periodically feel the pool floor from the inside. If you start to feel lumps, bumps, or unusual hardness, it may indicate that the underlayment has shifted or degraded. Address it promptly to prevent damage to the pool.
Frequently Asked Questions (FAQ)
Can I Put An Inflatable Pool Directly On Concrete?
It is not recommended. Concrete is abrasive and will wear down the pool liner over time, leading to leaks. It is also very cold, which can make the pool water uncomfortably chilly. Always use a protective layer.
What Is The Cheapest Thing To Put Under A Pool On Concrete?
The most cost-effective option is often old carpets or rugs that you already have. The next cheapest is purchasing a roll of geotextile landscaping fabric, which is very affordable and provides excellent protection against abrasion.
How Do I Keep My Pool Warm On A Concrete Surface?
Insulation is key. Using materials with good insulating properties, like interlocking EVA foam tiles or a padded pool floor, will create a thermal barrier between the cold concrete and the pool water, helping to retain heat.
Can Water Under The Pool Cause Damage?
Yes, trapped water between the pool liner and the concrete can lead to mildew, mold, and can cause some underlayments (like certain foams) to degrade faster. It can also create a slippery, unsafe surface when you take the pool down. Using a permeable layer like geotextile fabric or ensuring good drainage is important.
Is It Better To Use A Tarp Or Foam Under A Pool?
For concrete, foam is generally better than a tarp alone. A tarp provides only a moisture barrier and becomes slippery. Foam provides crucial cushioning and insulation. For best results, many people use both: a tarp as a base moisture barrier, topped with foam for comfort.
Choosing the right material to place under your inflatable pool on concrete makes all the difference. It protects your investment, makes the water more comfortable, and creates a safer environment for everyone. Whether you opt for the premium comfort of foam tiles, the professional protection of geotextile fabric, or a smart layered approach, taking this step will ensure your pool provides fun for many summers to come. Remember to prepare the surface, install your chosen underlayment carefully, and perform regular checks to keep everything in great shape. Now you’re ready to set up your pool with confidence and enjoy a cool, refreshing oasis right on your patio.