A 20×20 tarp covers a lot of ground. It shelters a stack of firewood, wraps a boat for winter, blocks a roof leak until the roofer shows up, or pulls double duty as a camping canopy when the weather turns. The right one earns its keep for years. The wrong one rips at the first grommet the first time you cinch it down.
This roundup pulls together ten solid options worth your attention. We focus on real-world thickness, grommet quality, and the kind of weather each tarp is actually built to take. Your specific job dictates which one makes sense.
A Closer Look At The Lineup
RAINDEWAY 20×20 Feet 18Mil Super Heavy Duty Tarp
TARPAL 20×20 Feet Super Heavy Duty 20mil Tarp
Xpose Safety 20×20 Ultra Heavy Duty 20 Mil Tarp
RAINDEWAY 20×20 Feet 9Mil Green/Black Tarp
TARPONIX Brown Poly Tarp 20×20 Lightweight 5 Mil
Boen Heavy Duty 20×20 16 Mil Rip Proof Tarp
GUARD SHIELD 20×20 Black 20mil Heavy Duty Tarp
Tarps Plus 20×20 12 Mil White Tarp
WHITEDUCK Canvas Tarp 18 oz Olive Drab
TARPAL 20×20 Black 14mil Heavy Duty Tarp
Why These Options Stand Out
The RAINDEWAY 18-mil tarp is a workhorse in the truest sense, designed for homeowners who want one cover that handles most jobs without complaint. At 9.2 oz per square yard with a 16×16 weave count, it has real heft in the hands and lays flat instead of flapping like a thinner poly sheet. The reversible gray-and-brown design means you can flip the visible side to match surroundings or simply extend the life of the tarp by rotating wear.
For most backyards and small construction sites, this is the kind of tarp you buy once and forget about until you need it. Reinforced metal grommets sit along the edges for tie-downs, and the woven polyethylene fibers shed water reliably during extended downpours. It handles snow loads without sagging into the pile, and the thickness keeps wind from catching and snapping smaller covers.
Everyday Wins
- Reversible two-tone finish extends useful life and lets you match the environment.
- 18-mil thickness and dense weave give a substantial feel that inspires confidence.
- Reinforced metal grommets stay anchored even when cinched tight against wind.
- Waterproof construction holds up through multi-day rain and snow exposure.
- Cut size matches the listed 20×20 dimensions for predictable coverage planning.
Worth Noting
- Heavier than mid-weight tarps, so solo handling over long distances can tire you out.
- Folding creates sharp crease lines that may eventually weaken if stored balled up.
Key Specs
Right Fit For
Homeowners who want one rugged tarp for firewood stacks, vehicle covers, and emergency roof patches over multiple seasons.
Swap It Out When
You need a thinner, easier-to-fold sheet for backpacking or tent fly duty, where the TARPONIX 5-mil tarp is a smarter fit.
TARPAL pushes thickness to 20 mil, sitting at the top of the polyethylene category and rivaling the Xpose Safety option covered next. The grey-and-brown reversible finish is a small detail that pays off over years of service, since you can flip the tarp when one side starts showing wear from UV or abrasion.
Compared with the RAINDEWAY 18-mil just reviewed, this TARPAL adds another two mil of body that helps when you’re covering sharp-cornered loads or letting the tarp sit through a tough winter. The trade-off is weight: this is a heavier sheet to wrestle into position alone, so a second set of hands helps during setup.
Notable Gains
- 20-mil thickness makes it one of the thickest poly tarps in this size category.
- Reversible color extends useful life by letting you rotate the wear side.
- Multi-layer construction improves tear resistance under stress.
- Polyethylene build holds up against mildew in damp storage conditions.
Points To Note
- Bulky to fold and store, so plan a dedicated bin or shelf space.
- Stiffer in cold weather, which can make precise draping tricky below freezing.
- May feel overbuilt for light weekend tasks like covering a picnic table.
Made For
Property owners in storm-prone regions who want maximum thickness for protecting equipment, boats, or roof leaks during extended bad weather.
A Better Fit Elsewhere
Casual users who only need seasonal coverage should consider the lighter Tarps Plus 12-mil instead, since the extra weight here adds little value for short-term projects.
The Xpose Safety tarp is built like a shelter system component, which makes sense given its design roots in camping and outdoor use. At 20 mil, it ties with the TARPAL option for the thickest polyethylene body in this roundup, while reinforced corners and an all-weather build focus on staying put when the wind picks up.
For a basecamp canopy or a long-term outdoor shelter, this tarp earns its reputation. The reversible white-and-brown finish gives you a heat-reflective side for sunny setups and a darker side for blending in. It is a step up in stiffness from the 16-mil Boen tarp reviewed later, so plan accordingly when folding for transport.
Useful Touches
- Reinforced corners survive repeated staking and tensioning without splitting.
- Reversible white-and-brown sides suit both sun reflection and visual concealment.
- UV protection extends service life during long sunny deployments.
- All-weather design handles rain, snow, and wind-driven debris.
Honest Caveats
- Premium thickness comes with extra weight that complicates solo backpack setups.
- Stiffer material makes tight folds harder without warm conditions.
Feature Snapshot
Best Suited To
Outdoor enthusiasts running basecamps, hunting camps, or extended expeditions where shelter reliability matters more than packing weight.
Look Elsewhere When
You only need a tarp for occasional backyard use, where the Boen 16-mil Hunter Green offers similar weather resistance at a more practical weight.
Stepping down in thickness, this 9-mil RAINDEWAY tarp trades the heavier build of its 18-mil sibling for easier handling and quicker deployment. At 5.3 oz per square yard with a 10×10 weave count, it folds without a fight and stores in a tighter space, making it a practical choice for projects that do not call for maximum thickness.
For seasonal yard work, painting projects, or temporary ground cover, this tarp covers the bases without overspending. The green-and-black reversible color option helps it blend into outdoor settings. It is not the tarp to leave out through a harsh winter, but it pulls its weight for shorter jobs.
The Value In It
- Lighter 5.3 oz weight folds easily and stores in smaller spaces.
- Reversible green-and-black finish suits outdoor aesthetics and extends life.
- UV-resistant treatment helps the material last through repeated sunny exposure.
- Full 20×20 finished size matches listed dimensions for accurate coverage planning.
Points To Keep In Mind
- 9-mil thickness is more vulnerable to punctures from sharp branches or hardware.
- Lighter weight means more flapping in high winds if not tightly secured.
Whose Shelf It Belongs On
DIY homeowners tackling painting, leaf cleanup, or short-term equipment covers who want a manageable tarp they can deploy without dragging out extra help.
Reach For A Different Pick When
You need a tarp that holds up to months of continuous outdoor exposure, where the GUARD SHIELD 20-mil black tarp is the more durable call.
The TARPONIX 5-mil tarp is the easygoing end of this list, built for quick covering jobs where weight and storage matter more than brute strength. At 5 mil thick, it is the thinnest option here, but the polyethylene body is still waterproof and UV-resistant for its intended short-term use.
Camping trips, painting drop cloths, and temporary ground cover are where this tarp shines. Compared with the heavier RAINDEWAY 9-mil covered earlier, this TARPONIX folds down to almost nothing and weighs far less in your pack or truck bed. Just do not expect it to survive rough winters or repeated sharp-edge contact.
A Few Highlights
- Lightweight build makes it easy to carry and deploy alone.
- Waterproof and UV-resistant for short outdoor deployments.
- Brown color blends into garden, camping, and outdoor work settings.
- Folds compactly for storage in tight garage or vehicle spaces.
Trade-Offs
- 5-mil thickness tears more easily than mid-weight or heavy-duty options.
- Best suited for short-term projects rather than year-round outdoor exposure.
- Limited abrasion resistance around rough tie-down hardware.
Quick Facts
Right Fit For
Campers, painters, and homeowners who want a tarp they can toss in the trunk without thinking twice about weight or bulk.
Skip It When
You need year-round weather protection for a stationary load, where the TARPAL 20-mil tarp will outlast this one by years.
The Boen 16-mil tarp hits a practical middle ground between the lightweight TARPONIX and the 20-mil heavyweights. Its hunter green color blends into wooded and yard settings, and the high-density woven top layer paired with a low-density laminate backing gives the material a flexible feel that resists cracking in cold weather.
Grommets every 18 inches along the edges and at each corner make this tarp a cinch to secure tightly. Compared with the RAINDEWAY 18-mil reviewed first, the Boen is slightly thinner but easier to fold, making it a smarter pick when you want dependable coverage without the wrestling match.
What Earns Its Place
- Frequent 18-inch grommet spacing allows tight, secure tie-downs.
- High-density woven top layer resists rips and abrasion.
- Flexible laminate backing holds up in cold temperatures without cracking.
- Waterproof and UV-resistant for year-round outdoor use.
- Versatile across vehicles, boats, camping, and construction applications.
Some Limits To Know
- 16-mil thickness sits between mid-weight and heavy-duty, not the toughest option.
- Some users may find the green color shows dirt and mildew stains over time.
Spec Overview
Who Should Grab It
Truck owners, contractors, and homeowners who need a versatile tarp for vehicles, gear, and temporary roof patches across changing weather.
A Better Fit Elsewhere
Anyone wanting maximum thickness for harsh winter exposure should pick the GUARD SHIELD 20-mil black tarp instead, which adds extra body for a small jump in weight.
The GUARD SHIELD tarp leans into maximum durability with a 20-mil double-sided polyethylene body and rope reinforced into the hem for serious edge strength. Rustproof brass grommets every 18 inches give you reliable tie-down points that do not corrode after a season in wet weather.
This is the tarp for outdoor setups that stay out all year. Pool covers, sandbox covers, vehicle storage, and boat protection are where it earns its reputation. Compared with the TARPAL 20-mil reviewed earlier, the GUARD SHIELD swaps grey-brown coloring for solid black and adds brass hardware that holds up better near saltwater.
Well-Handled Touches
- Heat-sealed seams and rope-reinforced hem strengthen the most common failure points.
- Brass grommets resist rust even in damp or coastal environments.
- Portable, washable, and reusable for multi-season deployments.
- Double-sided 20-mil thickness handles heavy wind and snow loads.
Where It May Fall Short
- Black color absorbs heat, which can be a drawback in direct summer sun.
- Stiffer material is harder to fold cleanly in cold weather.
- Heavier than mid-weight options, so plan for extra help during setup.
Who It Suits Best
Homeowners and tradespeople who leave tarps deployed outdoors through rain, sun, and wind for months at a time and want hardware that does not fail early.
Consider Something Else When
You want a lighter sheet for sunny roofing work, where the Tarps Plus white 12-mil reflects heat and is easier to handle overhead.
The Tarps Plus 12-mil tarp focuses on heat reflection and clean visibility, making it the natural pick for sunny roofing work, patio shade, and projects where you want to see what is underneath. Pure, non-recycled polyethylene gives it a tighter, more dependable weave than budget blended sheets.
At 12 mil thick with a laminated waterproof coating, it sits between the lightweight TARPONIX and the heavier Boen. The white surface stays cooler under direct sun and resists fading better than darker tarps in the same conditions. Compared with the GUARD SHIELD reviewed just before, this is the better choice for hot, exposed deployments.
The Practical Payoff
- White color reflects sunlight and keeps covered areas cooler.
- Pure polyethylene construction resists stretching and tearing under normal use.
- Laminated waterproof coating sheds rain without wicking.
- Versatile for roof leaks, garden use, boats, and pool coverage.
- Reinforced grommets support secure tie-downs for outdoor installations.
Factors To Consider
- White surface shows dirt, mildew, and stains more visibly than darker tarps.
- 12-mil body is mid-weight, so it sits between light-duty and heavy-duty categories.
Feature Rundown
Who Will Love This
Homeowners tackling sunny roofing patches, garden shade structures, or pool covers who want a tarp that stays cool and resists fading.
Not Your Match When
You need to blend into wooded or backyard surroundings, where the Boen Hunter Green offers better visual discretion.
The WHITEDUCK canvas tarp breaks from the polyethylene pack entirely. Made from 18 oz cotton duck canvas with a wax-treated finish, it brings a heavier, stiffer feel that trades waterproof construction for water-repellent breathability. The olive drab color suits industrial, military, and rustic applications where poly looks out of place.
At 37 mil thick (610 gsm) with double-filled plied yarn, this tarp is built for workshop floors, equipment covers, and traditional industrial use. Rustproof grommets keep the anchor points intact. Note the finished size runs slightly smaller than the listed 20×20 cut dimensions, so plan coverage accordingly.
Points In Its Favor
- Heavy 18 oz cotton duck canvas outlasts poly tarps in abrasive environments.
- Wax-treated finish repels water without trapping moisture underneath.
- Rustproof grommets hold up to industrial and outdoor work conditions.
- Tight weave construction resists tearing under heavy loads.
- Olive drab color suits industrial, agricultural, and workshop settings.
Less Ideal Details
- Finished size runs smaller than the listed 20×20 cut dimensions.
- Heavier than any poly tarp in this roundup, so solo handling is challenging.
- Water-repellent, not fully waterproof, so prolonged standing rain can soak through.
- Requires more storage space due to canvas stiffness.
Perfect Match For
Industrial and commercial users who want a breathable canvas tarp for workshops, equipment covers, and traditional rugged applications.
Where Another Pick Shines
Anyone needing full waterproof protection for boats or roof leaks should pick the GUARD SHIELD 20-mil poly tarp, which seals out water entirely.
The TARPAL 14-mil black tarp splits the difference between the brand’s own 20-mil heavyweight and the lighter 9-mil RAINDEWAY covered earlier. At 14 mil with a double-sided thickened coating, it brings solid tear and wear resistance without the bulk of thicker options. The solid black finish absorbs heat but hides stains well.
For everyday property use covering firewood, ATVs, or outdoor furniture, this tarp handles most jobs without strain. Aluminum grommets resist rust and accept standard tie-down hardware. It is the kind of tarp you grab for general tasks without overthinking the choice.
The Good Stuff
- 14-mil thickness balances durability with manageable weight.
- Double-sided thickened coating improves waterproof performance.
- Tightly woven polyethylene fibers resist tearing under tension.
- Aluminum grommets stay rust-free through repeated wet weather.
- Black finish hides dirt and mildew stains better than lighter colors.
Things To Weigh
- Black color absorbs heat, which can be a drawback in direct summer sun.
- Not as thick as the 20-mil options for the most demanding winter exposure.
Built With In Mind
Homeowners looking for an all-around tarp for firewood, outdoor furniture, and general property coverage that balances price and durability.
Another Choice May Suit
You need maximum puncture resistance for rough winter conditions, where the Xpose Safety 20-mil tarp offers thicker body for harsh deployments.
Matching Thickness To The Job At Hand
Choosing the right 20×20 heavy duty tarp comes down to matching thickness, material, and hardware to what you actually need it to do. Most shoppers underestimate how much difference a few mil of thickness make in real-world durability, so start there before anything else.
Mil thickness measures the plastic or canvas film thickness in thousandths of an inch. A 5-mil tarp handles light, short-term jobs like painting drop cloths. A 9 to 12-mil tarp covers seasonal yard work and moderate outdoor exposure. Once you pass 14 mil, you enter heavy-duty range where the tarp shrugs off snow loads, rough tie-down hardware, and months of UV without complaint. Anything 18 mil and up is built for serious year-round outdoor service.
Material matters just as much as thickness. Polyethylene is the most common, offering waterproof protection at a manageable weight. Canvas tarps trade full waterproofing for breathability and abrasion resistance, which matters in workshop and industrial settings where moisture needs to escape. Grommet material also signals long-term value: brass and aluminum resist rust, while basic metal grommets can corrode after a wet season.
For most homeowners, a 12 to 16-mil polyethylene tarp with rustproof grommets covers the majority of needs. If you store vehicles or equipment outdoors year-round, push toward 18 to 20 mil. If you only need a tarp for a weekend project or tent fly, save weight and storage space with a 5 to 9-mil option.
Real-World Use Scenarios
A tarp that works on a calm summer afternoon may fail the first time it sees a winter storm, so match your pick to your climate and exposure. Homeowners in storm-prone regions benefit from 18-mil or thicker builds with reinforced edges. Campers and outdoor enthusiasts want thicker fabric but should weigh that against pack size. Workshop users often prefer canvas for breathability and abrasion resistance over pure waterproofing.
Reader Profiles Worth Noting
First-time tarp shoppers often default to the thickest option without considering weight. Experienced users know that mid-weight 12 to 16-mil tarps handle most jobs and store more easily. Industrial buyers prioritize grommet quality and edge reinforcement over raw thickness, since those features determine whether the tarp survives repeated handling.
Avoiding The Usual Tarp Traps
Common Shopping Slip Ups
The biggest mistake is buying a tarp based on listed dimensions without checking finished versus cut size. Some manufacturers list the cut size before hemming, meaning the finished tarp runs a few inches smaller in each direction. That can leave gaps in coverage you did not plan for. Another common trap is choosing the cheapest 5-mil tarp for a job that calls for 14-mil durability, then watching it shred the first time wind picks up. Always match mil thickness to your exposure level, and check grommet spacing if you plan to secure the tarp at specific intervals.
What The Higher Tier Buys
Spending more on a 20-mil tarp gets you thicker material, reinforced edges, and rustproof brass grommets that hold up to years of outdoor exposure. You also get tighter weave counts, which improve tear resistance and reduce water seepage at seams. The upgrade pays off when you leave tarps deployed for months at a time or use them in harsh weather. For occasional weekend projects, mid-weight options deliver plenty of value without the extra weight and cost.
Frequently Asked Questions
What thickness of 20×20 tarp do most homeowners need?
Most homeowners do well with a 12 to 16-mil polyethylene tarp for general property use. Heavier 18 to 20-mil options make sense for year-round vehicle or equipment storage.
How long do heavy duty tarps typically last outdoors?
A 16 to 20-mil tarp with UV protection can last several years of continuous outdoor exposure. Thinner 5 to 9-mil tarps usually hold up for one to two seasons of intermittent use before showing wear.
Are canvas tarps better than polyethylene for outdoor use?
Canvas tarps offer better breathability and abrasion resistance but are water-repellent rather than fully waterproof. Polyethylene tarps seal out water completely, making them better for rain and snow protection.
What does mil thickness actually measure?
Mil measures tarp film thickness in thousandths of an inch. Higher mil numbers mean thicker material, which translates to better tear resistance, puncture protection, and durability under load.
How far apart should grommets be on a 20×20 tarp?
Most quality tarps space grommets every 18 inches along the edges and at each corner. Closer spacing allows tighter tie-downs in high-wind conditions.
Wrap Up
The right 20×20 heavy duty tarp depends on how you plan to use it. Storm-prone regions and year-round storage call for 18 to 20-mil builds like the GUARD SHIELD or TARPAL options. Campers and outdoor enthusiasts get reliable shelter from the Xpose Safety tarp. Sunny roofing and heat-reflection jobs favor the Tarps Plus white sheet. For everyday property work, a 12 to 16-mil mid-weight tarp covers most needs without the bulk. Match the mil thickness and material to your climate, and the tarp will earn its keep for years.