Should I Put A Tarp Under My Pool?

When It Makes Sense

• Good fit: You have a brand‑new above‑ground pool that will sit uncovered for weeks while you wait for installation accessories; a tarp keeps leaves, dust, and insects out.
• Good fit: You live in a region with strong UV exposure and want to minimise sun‑bleaching of the pool liner before you begin regular use.

When You Should Avoid It

• Warning sign: The pool is an in‑ground fiberglass or concrete model that already has a factory‑installed protective coating; additional tarping can trap moisture and cause surface issues.
• Warning sign: You lack a flat, level area to lay a tarp without creating folds, which can create pockets where water collects and promotes mold growth.

Pros and Cons

Pros

• Provides a physical barrier against leaves, insects, and debris, reducing the time needed for initial cleaning.
• Helps limit UV‑induced fading of liners or fabric components, extending their visual lifespan.

Cons

• Improperly secured tarps can trap heat, accelerating water evaporation and potentially warping or weakening liner material.
• Extra setup and removal steps add labor and may require additional accessories (grommets, weights, or tie‑downs).

Decision Checklist

• Will the pool be left uncovered for an extended period before first fill?
• Do you have a level, clean surface and secure anchoring points for the tarp?
• Can you monitor the tarp regularly to prevent heat buildup or water pooling?

Alternatives to Consider

Instead of a tarp, you might use a pool cover specifically designed for your pool type, which often includes integrated drainage and UV‑blocking layers. For short‑term protection, a simple mesh net can keep large debris out while allowing air flow. In climates with minimal leaf fall, simply scheduling a quick rinse before filling may be sufficient.

Final Recommendation

If your pool will sit idle for weeks, you live in a sunny area, and you can secure the tarp properly, using a tarp is a reasonable protective step. Conversely, if you have a permanent in‑ground pool, limited anchoring space, or concern about heat buildup, opt for a purpose‑built pool cover or skip the tarp altogether. For any high‑risk scenarios—such as dealing with costly liner warranties—consult the pool manufacturer or a qualified pool installer before proceeding.