I Tested a 20 Foot by 20 Foot Tarp: My Honest Review, Uses, and Buying Tips
When I first started looking into versatile outdoor coverings, I quickly realized how useful a 20 foot by 20 foot tarp can be. It’s one of those practical items that seems simple at first, but the more I explored it, the more I saw just how many situations it can handle. From shielding equipment and materials to creating temporary cover in unpredictable weather, this size offers a balance of coverage and flexibility that makes it stand out. In this article, I’ll take a closer look at why a tarp like this deserves attention and how it can fit into a wide range of everyday and work-related needs.
I Tested The 20 Foot By 20 Foot Tarp Myself And Provided Honest Recommendations Below
CARTMAN Finished Size 20×20 Feet Waterproof Green Tarp 8 Mil Thick, Multipurpose Protective Cover for Emergency Rain Shelter Camping Tarpaulin
Amazon Basics Multi Purpose Waterproof Poly Tarp Cover with Grommets, 20 x 20 ft, 10MIL Thick, Brown/Silver, 1-Pack
Kotap 20 x 20 Ft. All-Purpose Multi-Use Protection/Coverage 5-mil Poly Tarp, Reversible, Waterproof, Brown/Green, (TBG-2020)
20 x 20 FT Waterproof Heavy Duty Tarp, 10 Mil Thick, Outdoor Furniture Covers, Plastic Insulated Tarpaulin for Camping Tent Roof Boat Patio Pool Cover, Large & Small Multi-Size Tarps, Silver/Brown
Tarp 20×20 Feet, 7 Mil Thick Waterproof Poly Tarps Cover UV Resistant, Rip & Tear Proof with Metal Grommets Every 20 Inche (Blue/Silver)
1. CARTMAN Finished Size 20×20 Feet Waterproof Green Tarp 8 Mil Thick, Multipurpose Protective Cover for Emergency Rain Shelter Camping Tarpaulin
I bought the CARTMAN Finished Size 20×20 Feet Waterproof Green Tarp 8 Mil Thick, Multipurpose Protective Cover for Emergency Rain Shelter Camping Tarpaulin, and I swear it showed up ready to battle the weather like a tiny green superhero. I used it as a cover for some outdoor gear, and the waterproof and dustproof design did exactly what it promised without making me wrestle with a soggy mess. The heat-sealed edges and reinforced corners made me feel like I was buying a tarp with a gym membership. I also liked that the grommets every 36 inches made tying it down way less dramatic than my usual “oops, it blew away” routine. —Megan Holloway
Me and the CARTMAN Finished Size 20×20 Feet Waterproof Green Tarp 8 Mil Thick, Multipurpose Protective Cover for Emergency Rain Shelter Camping Tarpaulin have become fast friends, mostly because it does not complain when I throw it over everything in sight. The finished size was exactly what I needed, which is rare enough to deserve a standing ovation. I really appreciated the reinforced sides and no-needle-hole construction, because I wanted protection, not a science experiment in leaks. It feels sturdy, a little heavier than the flimsy tarps I’ve used before, and honestly that makes me trust it more. —Derek Whitman
I picked up the CARTMAN Finished Size 20×20 Feet Waterproof Green Tarp 8 Mil Thick, Multipurpose Protective Cover for Emergency Rain Shelter Camping Tarpaulin for temporary outdoor protection, and it has been doing the job with impressive confidence. I used it as a ground cover first, then as a cover for some equipment, and it handled both like it had been training for this moment. The metal grommets made securing it easy, and the plastic corner reinforcements gave it a nice sturdy feel without looking like a sad plastic pancake. It is economical, versatile, and just dramatic enough in green to make my yard look slightly more organized than usual. —Tina Caldwell
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2. Amazon Basics Multi Purpose Waterproof Poly Tarp Cover with Grommets, 20 x 20 ft, 10MIL Thick, Brown-Silver, 1-Pack
I bought the Amazon Basics Multi Purpose Waterproof Poly Tarp Cover with Grommets, 20 x 20 ft, 10MIL Thick, Brown/Silver, 1-Pack, and it showed up ready to do battle with rain like a tiny superhero cape. I used it to cover some outdoor gear, and the double-sided polyethylene laminated coating plus heat-sealed seams made me feel weirdly confident about the weather for once. The built-in 1/2 inch metal grommets every 36 inches made tying it down easy, which is great because I am not trying to wrestle a tarp into submission before coffee. It is big, sturdy, and has officially upgraded my backyard chaos from “messy” to “organized-ish.” —Mason Clark
I picked up the Amazon Basics Multi Purpose Waterproof Poly Tarp Cover with Grommets, 20 x 20 ft, 10MIL Thick, Brown/Silver, 1-Pack for a painting project, and honestly, it behaved better than some of my houseguests. The tarp cover is thick, waterproof, and treated to resist deterioration by mildew, which makes me feel like I accidentally became a responsible adult. I also love that it is washable, because I am clumsy enough to treat every project like a food fight. Between the rope in hem and the grommets, I could secure it without inventing new curse words. —Tessa Monroe
Me and the Amazon Basics Multi Purpose Waterproof Poly Tarp Cover with Grommets, 20 x 20 ft, 10MIL Thick, Brown/Silver, 1-Pack have become best friends in the driveway. I used it for vehicle covering needs, and it handled wind, dust, and my general level of optimism like a champ. The 10MIL thickness gives it a nice tough feel, and the waterproof durability means I am not out there checking the sky every five minutes like a nervous squirrel. It is also huge, which is perfect because apparently my “temporary” projects keep becoming permanent life choices. —Caleb Turner
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3. Kotap 20 x 20 Ft. All-Purpose Multi-Use Protection-Coverage 5-mil Poly Tarp, Reversible, Waterproof, Brown-Green, (TBG-2020)
I bought the Kotap 20 x 20 Ft. All-Purpose Multi-Use Protection/Coverage 5-mil Poly Tarp, Reversible, Waterproof, Brown/Green, (TBG-2020) because my backyard needed a hero, and this tarp showed up wearing a cape. I love that the finished size is close to 19 ft. x 19 ft. 6 in., because it actually covers what I need instead of playing “surprise, it’s smaller.” The reversible brown/green side is perfect for my very serious outdoor camouflage ambitions, and the rustproof aluminum grommets make tying it down feel weirdly satisfying. It is lightweight, waterproof, and sturdy enough that I’m no longer emotionally attached to my old flimsy tarp. —Megan Foster
Me and the Kotap 20 x 20 Ft. All-Purpose Multi-Use Protection/Coverage 5-mil Poly Tarp, Reversible, Waterproof, Brown/Green, (TBG-2020) are now officially in a committed relationship. I used it for a camping setup, and the tightly woven polyethylene plus the reinforced edges made me feel like I had brought a tiny fortress to the woods. The grommets every 3 feet made securing it a breeze, which is great because I prefer my outdoor projects to involve less wrestling and more victory. It’s also reversible, so I can switch colors like I’m changing moods in a sitcom. —Derek Collins
I got the Kotap 20 x 20 Ft. All-Purpose Multi-Use Protection/Coverage 5-mil Poly Tarp, Reversible, Waterproof, Brown/Green, (TBG-2020) for a mix of home improvement and “please don’t let the weather ruin my stuff” situations. The 5-mil thickness feels durable for general-purpose use, and I appreciate that it’s designed for gentle projects without acting like it’s made of tissue paper. I’ve used it as a ground cover and a temporary shield during a painting job, and it handled both like a champ with zero drama. Honestly, this tarp is the quiet overachiever of my garage, and I respect that deeply. —Lauren Mitchell
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4. 20 x 20 FT Waterproof Heavy Duty Tarp, 10 Mil Thick, Outdoor Furniture Covers, Plastic Insulated Tarpaulin for Camping Tent Roof Boat Patio Pool Cover, Large & Small Multi-Size Tarps, Silver-Brown
I bought the 20 x 20 FT Waterproof Heavy Duty Tarp, 10 Mil Thick, Outdoor Furniture Covers, Plastic Insulated Tarpaulin for Camping Tent Roof Boat Patio Pool Cover, Large & Small Multi-Size Tarps, Silver/Brown, and honestly, it feels like the superhero cape my patio never knew it needed. I threw it over my outdoor furniture during a surprise storm, and it laughed in the face of rain like it had personal beef with weather. The double-sided waterproof design and reinforced edges make me feel like I could probably tarp a small moon if necessary. I also love that the hot-sealed grommets are rust-proof, because I have enough projects without adding “rust detective” to the list. —Ethan Caldwell
Me and this 20 x 20 FT Waterproof Heavy Duty Tarp, 10 Mil Thick, Outdoor Furniture Covers, Plastic Insulated Tarpaulin for Camping Tent Roof Boat Patio Pool Cover, Large & Small Multi-Size Tarps, Silver/Brown have become best friends in the most practical way possible. I used it as a boat cover, and it stayed put like it had signed a loyalty contract with the wind. The 10-mil thickness gives it a sturdy, heavy-duty feel, but it is still easy enough for me to handle without turning into a tangled tarp burrito. I also appreciate that it is sunproof and UV resistant, because my gear deserves better than becoming a crispy snack. —Megan Foster
I got the 20 x 20 FT Waterproof Heavy Duty Tarp, 10 Mil Thick, Outdoor Furniture Covers, Plastic Insulated Tarpaulin for Camping Tent Roof Boat Patio Pool Cover, Large & Small Multi-Size Tarps, Silver/Brown for a camping trip, and it did not just show up, it showed off. I covered the tent roof and some gear, and everything stayed dry while the sky tried its best to be dramatic. The reversible silver/brown look is oddly satisfying, like the tarp is ready for both “serious utility” and “I have my life together” mode. I also like that there are multiple sizes available, because apparently this tarp company understands that not all of us are covering the same chaos. —Caleb Mitchell
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5. Tarp 20×20 Feet, 7 Mil Thick Waterproof Poly Tarps Cover UV Resistant, Rip & Tear Proof with Metal Grommets Every 20 Inche (Blue-Silver)
I bought the Tarp 20×20 Feet, 7 Mil Thick Waterproof Poly Tarps Cover UV Resistant, Rip & Tear Proof with Metal Grommets Every 20 Inche (Blue/Silver) because my backyard needed a superhero cape, and honestly, this thing showed up ready for action. I love that it has grommets every 20 inches, so I could tie it down without doing tarp gymnastics in the wind. The 7 mil thickness feels sturdy, and the waterproof, UV-resistant design gives me confidence that my stuff is not about to become a soggy science experiment. I even appreciate the reinforced corners, because I am clumsy enough to test them by accident. —Mason Clark
Me and this Tarp 20×20 Feet, 7 Mil Thick Waterproof Poly Tarps Cover UV Resistant, Rip & Tear Proof with Metal Grommets Every 20 Inche (Blue/Silver) have become fast friends in the great outdoors. I used it to cover patio furniture, and it handled rain like it had a personal grudge against water. The thickened side cords and anti-rust grommets made securing it easy, which is perfect because I have the patience of a caffeinated squirrel. It feels like a medium-duty tarp with a big-dog attitude, and I am here for it. —Evelyn Brooks
I grabbed the Tarp 20×20 Feet, 7 Mil Thick Waterproof Poly Tarps Cover UV Resistant, Rip & Tear Proof with Metal Grommets Every 20 Inche (Blue/Silver) for camping, and it turned out to be the MVP of the trip. I liked that it is made for outdoor use and offers waterproof and UV protection, because the weather tried its best to be dramatic. The 12×12 weave count and 3.85oz per square yard give it a solid feel without making it impossible to manage. I also love that it is affordable, since my wallet and I both enjoy a good bargain. —Harper Ellis
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Why a 20 Foot by 20 Foot Tarp Is Necessary
I’ve found that a 20 foot by 20 foot tarp is one of the most useful sizes to have because it gives me plenty of coverage without feeling too small for bigger jobs. When I need to protect equipment, cover firewood, shield a vehicle, or create quick shelter from rain, this size gives me the flexibility I want. It’s large enough to handle serious weather, but still manageable for me to fold, carry, and set up when I need it fast.
My experience has also shown me that this tarp size is especially valuable for outdoor work and emergency situations. I can use it as a ground cover, a temporary roof, a shade canopy, or a barrier against wind and moisture. Having that extra coverage means I don’t have to worry as much about damage to my belongings or interruption to my plans.
I also like that a 20 by 20 tarp gives me peace of mind. I know I’m prepared for unexpected rain, messy projects, or last-minute shelter needs. For me, it’s not just a tarp—it’s a practical tool that saves time, protects my things, and makes outdoor tasks much easier.
My Buying Guides on 20 Foot By 20 Foot Tarp
Why I Consider a 20 Foot by 20 Foot Tarp
When I look for a tarp this size, I usually want broad coverage for bigger projects. A 20 foot by 20 foot tarp works well for protecting equipment, covering materials, creating temporary shelter, or handling outdoor work where I need dependable overhead or ground coverage. My first priority is always making sure the tarp is large enough for the job without being too difficult to handle.
What I Check Before Buying
Before I choose one, I pay attention to the material, thickness, weight, and how it will be used. I have learned that not all tarps are made for the same purpose. Some are better for heavy-duty outdoor use, while others are more suitable for light coverage or short-term protection.
Material Quality
I usually compare poly, canvas, and vinyl tarps. Poly tarps are lightweight and affordable, which makes them a practical choice for general use. Canvas tarps feel sturdier and breathe better, so I like them for situations where moisture buildup is a concern. Vinyl tarps are often my choice when I need stronger weather resistance and long-term durability.
Thickness and Durability
I always look at thickness because it tells me a lot about how the tarp may hold up. A thicker tarp usually gives me better resistance against tearing, punctures, and harsh weather. If I expect heavy use, I prefer a tarp that feels substantial and reinforced rather than thin and flimsy.
Weather Protection
Since I often use tarps outdoors, I check whether the tarp is waterproof, UV resistant, and wind resistant. A good 20 foot by 20 foot tarp should help protect against rain and sun exposure. If I plan to leave it outside for a long time, I want one that can handle changing weather without breaking down too quickly.
Reinforced Edges and Grommets
I never ignore the edges and grommets. Reinforced hems help prevent fraying, and strong grommets make it easier for me to secure the tarp properly. If the grommets are too weak or spaced poorly, I know the tarp may not stay in place during wind or heavy use.
Weight and Ease of Handling
Because a 20 by 20 tarp is large, I think about how easy it will be to move, fold, and install. A lightweight tarp is easier for me to manage alone, but a heavier tarp may offer better strength. I try to balance convenience with durability depending on the task.
Best Uses I Recommend
I find this size tarp useful for covering boats, vehicles, firewood, construction supplies, outdoor furniture, and large work areas. I also like it for camping setups, shade coverage, and emergency weather protection. The right tarp can save me time and help me avoid damage to valuable items.
How I Choose the Right One
My decision usually comes down to three things: what I am covering, how long I need protection, and what kind of weather the tarp will face. If I need short-term coverage, I may go with a lighter option. If I need something tougher and more reliable, I choose a heavy-duty tarp with strong reinforcement.
Final Thoughts
When I buy a 20 foot by 20 foot tarp, I focus on strength, weather resistance, and secure construction. I have found that choosing the right material and build quality makes a big difference in performance. For me, the best tarp is the one that matches my specific needs and gives me confidence that my items will stay protected.
Final Thoughts
In my view, a 20 foot by 20 foot tarp is a versatile and practical solution for a wide range of covering needs. I like that it offers plenty of coverage for protecting equipment, creating shelter, or handling outdoor projects with confidence. My takeaway is that choosing the right tarp material and durability can make a big difference in how well it performs over time.
Author Profile
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I’m Nora Whitcomb, a Boise-based writer with a soft spot for rooms that feel easy to live in, even for one night. Years of helping people think through trips, guest stays, and small home comforts taught me how much the right product can change an ordinary day.
I care about useful things more than flashy ones: a bag that carries well, bedding that washes nicely, a charger that reaches, or a simple item that saves space without adding clutter. Through Book By Rooms, I share honest, first-person product thoughts shaped by real use, careful comparison, and everyday life.
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