Should I Put A Tarp Under My Pool?

When It Makes Sense

• Good fit: You have an above‑ground pool in a region with a lot of leaf fall or dust, and you want to protect the pool liner while the pool sits dormant for part of the year.
• Good fit: You are setting up a temporary pool on a hard‑surface patio or deck and need a smooth, level barrier that prevents moisture from the ground reaching the liner.

When You Should Avoid It

• Warning sign: You live in a hot, humid climate where a tarp can trap heat and moisture, accelerating liner wear or fostering mold.
• Warning sign: Your pool sits on grass or soil that can retain water; a tarp may create a puddle beneath the pool, leading to uneven support.

Pros and Cons

Pros

• Provides a physical barrier that reduces punctures, tears, and wear on the pool liner from sharp objects.
• Keeps debris, leaves, and insects out, making water cleaning easier and reducing chemical demand.

Cons

• Traps heat and humidity, which can accelerate liner degradation and make the pool surface hotter to the touch.
• Improperly secured tarps can shift, creating wrinkles that cause uneven pressure on the liner or even damage the frame.

Decision Checklist

• Is the pool location prone to debris, sharp objects, or ground moisture that could harm the liner?
• Will the tarp increase heat or humidity in a way that could shorten the liner’s life or affect comfort?
• Do you have a method to securely anchor the tarp so it stays flat and does not create pressure points?

Alternatives to Consider

Instead of a full tarp, you might use a pool liner protector mat, a roll‑out ground cloth, or a sand‑filled base that levels the ground and drains water. For permanent installations, a concrete slab or a purpose‑built deck provides the most durable barrier without the heat‑trapping issues of a tarp.

Final Recommendation

If you run an above‑ground pool on a hard, clean surface and need extra protection from debris while the pool is unused, a properly fitted, well‑ventilated tarp can be a practical solution. In hot, humid climates or on soft ground, consider a more permanent base or a breathable protective mat. Always follow manufacturer guidelines and, if uncertain about structural support or moisture‑related risks, consult a pool installation professional.