The best 20 x 100 plastic sheeting depends on the job: choose 10-mil sheeting for a thicker, more durable cover or 4-mil sheeting for a lighter-duty, full-size roll. The products below include two options listed at 20 feet by 100 feet, plus alternatives for greenhouse use, crawl spaces, and overwintering. Check the dimensions and thickness carefully: several alternatives are not 20 x 100, so they may suit a specific task better but will not cover the same area.
| Product | Listed Size | Best For |
|---|---|---|
| Top Visqueen Poly Sheeting | 20 ft x 100 ft, 10 mil | Thicker general-purpose coverage |
| Farm Plastic Supply Greenhouse Film | 16 ft x 10 ft, 6 mil | Greenhouse applications |
| Crawl Space Vapor Barrier | 10 ft x 50 ft, 20 mil | Crawl-space barrier projects |
| Farm Plastic Supply White Sheeting | 28 ft x 25 ft, 6 mil | Overwintering coverage |
| Clear Plastic Poly Sheeting | 20 ft x 100 ft, 4 mil | Large-area, lighter-duty coverage |
Top Visqueen 10-Mil Poly Sheeting
This translucent or white poly sheeting is listed as 20 feet by 100 feet and true 10 mil thick. Its larger size and thicker construction make it the best fit here for buyers who need a full-size roll and want a more substantial sheet than the 4-mil alternative. The listing describes it as durable, making it a candidate for demanding general coverage tasks.
Best for: Buyers prioritizing both the requested 20 x 100 dimensions and higher listed thickness. Limitation: The listing does not specify a particular application or provide additional performance details, so match it to the requirements of your project.
Farm Plastic Supply 6-Mil Greenhouse Film
This clear polyethylene film is described as greenhouse sheeting with a four-year designation and 6-mil thickness. At 16 feet by 10 feet, it is much smaller than a 20 x 100 roll, but its stated greenhouse purpose makes it more application-specific than general-purpose sheeting.
Best for: Greenhouse buyers who need clear film and a size suited to a smaller coverage area. Limitation: It does not meet the 20 x 100 size requirement; choose another option if a single large sheet is essential.
20-Mil Crawl Space Vapor Barrier
This white plastic sheeting is listed at 20 mil and 10 feet by 50 feet. Its product name identifies it as a crawl-space vapor barrier, and its thickness is substantially greater than the 4- or 6-mil options in this selection. It is therefore better suited to buyers shopping for a crawl-space barrier than for a wide, general-purpose cover.
Best for: A crawl-space project where the listed barrier type and 20-mil thickness are priorities. Limitation: The roll is only 10 feet wide and 50 feet long, so it is not a substitute for a continuous 20 x 100 sheet.
Farm Plastic Supply White Overwintering Film
This 6-mil white plastic film is described for overwintering and greenhouse use. Its listed dimensions are 28 feet by 25 feet, which provide a different coverage shape from a 20 x 100 roll. Buyers comparing white film for seasonal plant or structure coverage may find its stated purpose more relevant than clear general-use sheeting.
Best for: Buyers seeking white film for an overwintering application. Limitation: It is not 20 x 100, so confirm that its dimensions fit the intended area before choosing it.
Clear 4-Mil Poly Sheeting, 20 x 100
This clear plastic poly sheeting is listed at 20 feet by 100 feet and 4 mil thick. The stated uses include containing hazardous dust, asbestos, lead paint, and mold-remediation debris, as well as weather-proofing, covering fresh concrete, and placing under landscaping mulch.
Best for: Buyers who need the requested full-size dimensions for listed coverage and containment tasks, and who prefer a thinner sheet than the 10-mil option. Limitation: At 4 mil, it is thinner than the 10-mil and 20-mil products here; check project requirements before selecting it for demanding use.
Buying Guide: How to Choose 20 x 100 Plastic Sheeting
Should you choose 4 mil or 10 mil?
Thickness is a key comparison point. The 4-mil option is listed for dust containment, weather-proofing, concrete covering, and landscaping uses. The 10-mil option is described as durable and offers a thicker sheet in the same 20 x 100 dimensions. Select thickness based on the demands of the job, handling, and any project specifications rather than assuming all plastic sheeting performs alike.
How much coverage does a 20 x 100 roll provide?
A 20-foot-by-100-foot sheet covers 2,000 square feet before accounting for overlaps, edges, cuts, or waste. Measure the surface and include extra material where seams or folded edges are needed. For irregular surfaces, plan how the sheet will be cut and positioned before purchase.
Does color or application matter?
Yes. The exact-size options are translucent/white 10-mil sheeting and clear 4-mil sheeting. The other products are application-focused alternatives: clear greenhouse film, white overwintering film, and white crawl-space barrier. Use the listed purpose and color as selection criteria, but verify that the chosen product meets the requirements of the specific project.
Frequently Asked Questions
What does 20 x 100 mean for plastic sheeting?
It refers to a sheet listed as 20 feet wide by 100 feet long, with a nominal area of 2,000 square feet.
Which listed products are actually 20 x 100?
The Top Visqueen 10-mil sheeting and the clear 4-mil poly sheeting are both listed at 20 feet by 100 feet.
Is 10-mil sheeting thicker than 4-mil sheeting?
Yes. A 10-mil sheet has a greater listed thickness than a 4-mil sheet. Thickness alone does not establish suitability for every application.
Can greenhouse film replace a 20 x 100 roll?
Not by dimensions in this selection. The greenhouse film is listed at 16 feet by 10 feet, so it may fit a smaller greenhouse project but does not provide the same coverage as a 20 x 100 sheet.
What should I check before ordering?
Confirm the listed width, length, thickness, color, and intended application. Also account for overlaps, cuts, and project-specific requirements before deciding how much material to buy.