Should I Put A Tarp Under My Tent?

When It Makes Sense

• Good fit: When camping on damp ground or in areas prone to rain, a tarp can protect the tent floor from moisture and prolong its lifespan.
• Good fit: When you need an extra barrier against rocks, sticks, or uneven terrain that could puncture or abrade the tent’s base.

When You Should Avoid It

• Warning sign: In very windy conditions where a loose tarp can act like a sail and increase the risk of the tent collapsing.
• Warning sign: On hard, rocky surfaces where a tarp adds little benefit but can trap water and create a slippery layer.

Pros and Cons

Pros

• Provides an additional moisture barrier, keeping the interior drier during light rain or ground seepage.
• Extends the life of the tent floor by shielding it from abrasive ground and sharp objects.

Cons

• Improperly secured tarps can catch wind, leading to tent instability or increased setup complexity.
• Additional weight and bulk may be undesirable for backpackers striving for minimal pack weight.

Decision Checklist

• Will the campsite have wet or uneven ground that could affect the tent floor?
• Do you expect strong winds or storms during your trip?
• Can you comfortably secure the tarp without compromising tent ventilation?

Alternatives to Consider

Instead of a full‑size tarp, you might use a lightweight footprint designed specifically for your tent model, or simply choose a campsite with naturally dry, level ground. A groundsheet made of durable, breathable material can also offer protection without the wind‑catching risk of a larger tarp.

Final Recommendation

If you are camping on damp, uneven terrain and can set up a taut, well‑anchored tarp, the extra protection is worthwhile. In windy, exposed sites or when minimizing pack weight is a priority, skipping the tarp or using a tent‑specific footprint is safer. Always assess conditions and, for high‑altitude or extreme weather expeditions, consult experienced outdoor professionals.