The best crawl space plastic liner depends on the coverage you need and how much material thickness suits your project. These five black-and-white polyethylene liners include four 10-mil options and one 14-mil option. The 14-mil Crawldryer liner is best for buyers prioritizing thicker sheeting; the 10-by-100-foot rolls suit larger coverage needs, while ALORAIR’s 10-by-65-foot roll may fit smaller projects.
| Product | Thickness | Roll Size | Best For |
|---|---|---|---|
| Crawldryer Black and White Film | 10 mil | 10 × 100 ft | General-purpose coverage |
| ALORAIR 10 × 100 ft | 10 mil | 10 × 100 ft | Moisture-control projects |
| ALORAIR 10 × 65 ft | 10 mil | 10 × 65 ft | Smaller coverage areas |
| Crawldryer 14 mil | 14 mil | 10 × 100 ft | Thicker sheeting |
| SPIRECOVER Panda Film | 10 mil | 10 × 100 ft | Virgin-poly film option |
Crawldryer 10-Mil Black And White Film
This 10-mil high-density polyethylene liner measures 10 feet by 100 feet and is listed to cover 1,000 square feet. Its black-and-white surfaces are designed for different purposes: black blocks light, while white reflects over 90% of light. The smooth film is described as easy to clean.
Best for: Homeowners seeking a full-size, general-purpose roll for crawl space encapsulation or other covering jobs. It was selected for its stated dimensions, 10-mil thickness, and double-sided design. The product description also identifies it for painter’s tarps and protective covering.
Consider: A 10-mil sheet is thinner than the 14-mil option below. The listing describes vapor and radon mitigation applications, but a liner alone should not be treated as a guaranteed radon-control system.
ALORAIR 10-Mil 10-By-100-Foot Barrier
ALORAIR’s black-and-white polyethylene sheeting is intended for crawl space encapsulation, moisture control, and weatherproofing. The product description notes anti-aging additives intended to help resist tearing, a smooth surface, and vapor resistance on both sides. The white side reflects up to 90% of light; the black side blocks light penetration.
Best for: Buyers who want a 10-by-100-foot roll with the brand’s described reinforced design and anti-aging additives. Its listed uses include protecting foundations, insulation, and structural components from moisture-related damage.
Consider: The listed features do not state a specific mil thickness for this particular roll, so confirm thickness on the product listing before comparing it with other 10-mil choices. Installation details and required coverage are also project-dependent.
ALORAIR 10-Mil 10-By-65-Foot Barrier
This ALORAIR roll measures 10 feet by 65 feet. Its described features match the larger ALORAIR option: black-and-white double-sided polyethylene, anti-aging additives, a smooth surface, and use for moisture control and crawl space encapsulation. The product description identifies the white surface as reflecting up to 90% of light.
Best for: Buyers whose measured project needs less sheeting than a 10-by-100-foot roll provides. The shorter length can make it easier to plan coverage for a smaller area and avoid purchasing as much material.
Consider: It provides less total area than the 100-foot roll, so calculate floor and wall coverage, overlaps, and any cuts before choosing. The listing’s feature text does not specify this roll’s mil thickness; verify it before purchase.
Crawldryer 14-Mil Heavy-Duty Liner
This low-density polyethylene film is 14 mil thick and measures 10 feet by 100 feet, with stated coverage of 1,000 square feet. The listing describes it as heavy-duty, reusable, and suitable for crawl space encapsulation. Its black side blocks light, while its white side offers over 90% reflectivity.
Best for: Buyers who prefer thicker sheeting than the 10-mil options provide and need a full-size roll. It stands out in this group by listed thickness, not by a different roll footprint.
Consider: A thicker liner may be more material than some projects require. Plan around crawl space dimensions and installation needs rather than selecting thickness alone.
SPIRECOVER 10-Mil Panda Film
SPIRECOVER’s 10-mil polyethylene film is made from 100% virgin poly materials, according to its listing. The 10-by-100-foot roll is described as covering 1,000 square feet. Its black surface helps block light, and its white surface reflects up to 90% of light. The product is also described as reusable.
Best for: Buyers seeking a 10-mil, 1,000-square-foot black-and-white roll with virgin-poly material specified in the product details. It was selected as a comparable full-size alternative to the other 10-mil options.
Consider: Its stated area is the deployed roll coverage; cuts, overlaps, and wall coverage reduce the area available for the crawl space floor.
Buying Guide: How To Choose A Crawl Space Plastic Liner
How much coverage should you buy?
Measure the crawl space floor and any walls that need lining. Add material for seams, overlaps, irregular corners, and trimming. A 10-by-100-foot roll is listed as covering 1,000 square feet before those project needs are accounted for. The 10-by-65-foot roll is a smaller option, but provides less total material.
Is 10 mil or 14 mil the better choice?
Mil describes film thickness: 14 mil is thicker than 10 mil. In this product selection, the Crawldryer 14-mil liner is the thicker option, while the other clearly specified liners are 10 mil. Compare the thickness against your installation conditions and handling needs; the product descriptions do not establish that one thickness is necessary for every crawl space.
What do the black and white sides do?
The black side is described as blocking light. The white side reflects up to 90% of light on several listed products, and over 90% on the Crawldryer options. Both ALORAIR products are described as offering vapor resistance on either side. Follow the product’s installation directions for orientation and placement.
What else should buyers check?
- Confirm the listed thickness for the exact roll you plan to order.
- Compare roll width and length with the crawl space layout.
- Consider whether you need extra material for seams, walls, and obstacles.
- Address drainage and standing water separately; a plastic liner is not a substitute for resolving water intrusion.
- Do not assume a vapor barrier by itself ensures radon control. Follow local guidance and consult a qualified professional when radon is a concern.
Frequently Asked Questions
What is a crawl space plastic liner used for?
It is laid over crawl space soil as part of a moisture-control or encapsulation project. The listed products are designed to reduce soil moisture vapor migration.
How many square feet does a 10-by-100-foot roll cover?
The dimensions equal 1,000 square feet before cuts, overlaps, and material used on walls or around obstacles.
Is a 14-mil liner thicker than a 10-mil liner?
Yes. A 14-mil liner is thicker than a 10-mil liner, although the best choice depends on the project and installation conditions.
Does a crawl space liner eliminate radon?
No product details here establish that a liner alone eliminates radon. Treat radon as a separate concern and consult qualified local guidance.
Can the white side face upward?
The listed products describe the white surface as reflective, but the provided features do not specify a required installation orientation. Check the instructions for the selected liner.