ProSource Blue Tarpaulin 20x30 ft

Worth it for contractors who need reliable temporary coverage that stays flexible in Montana’s freezing conditions. The 5 mil medium-duty polyethylene construction provides enough strength for construction site protection without the stiffness that plagues cheaper tarps when temperatures drop. At 600 square feet of coverage, this size handles standard equipment groups, lumber stacks, or temporary roof patches.

Skip it if you’re looking for multi-season outdoor storage. The medium-duty rating means this is temporary protection, not a permanent solution. Heavy-duty tarps in the 10+ mil range cost more but last years instead of seasons.

Cold Weather Performance and Construction Details

The tarp remains pliable in freezing temperatures — a critical feature most manufacturers don’t even mention. Contractors working through Montana winters know the frustration of wrestling with frozen, brittle tarps that crack along fold lines. This flexibility comes from the 5 mil thickness hitting the sweet spot between durability and workability.

The rope-reinforced hem with heat-sealed edges prevents the common failure point where water wicks into unsealed edges and freezes, splitting the material. Reinforced corners add strength where tie-down stress concentrates, especially important when securing loads in wind.

Specification	Value
Dimensions	20 ft x 30 ft
Coverage Area	600 square feet
Thickness	5 mil (Medium-duty)
Material	Polyethylene (PE) weave
Weave Density	8 x 10 mesh (some variants report 16 x 20 strands per sq in)
UV Protection	UV-coated
Waterproof	Yes

The weave density variation in specifications suggests different production runs or measurement methods. Either way, the construction provides adequate tear resistance for temporary use.

Grommet System and Wind Resistance

Rust-resistant aluminum grommets spaced every 3 feet around the perimeter match standard tie-down spacing for most applications. Three-foot intervals allow enough attachment points to prevent wind billowing without over-complicating the setup.

The aluminum grommet material matters more than contractors realize. Steel grommets rust after one season of snow exposure, weakening the attachment points and staining whatever’s underneath with rust streaks. These aluminum grommets resist corrosion, maintaining strength through multiple uses.

Customer feedback emphasizes durability, water resistance, and affordability, confirming the tarp performs as specified in real-world conditions. Users specifically noted it “stayed flexible in cold weather as advertised” — validation that matters when you’re working in January.

Installation and Maintenance

Secure using grommets every 3 feet with rope or bungee cords. Avoid dragging over sharp objects to maintain water-tight integrity. Standard advice, but the sharp object warning is especially relevant on construction sites where exposed rebar, metal edges, and rough lumber are everywhere.

Clean with soap and water; air dry before rolling for storage. Store in a cool, dry place away from direct sunlight when not in use. Proper storage extends lifespan significantly. Tarps stored wet develop mildew that weakens the material. UV degradation continues even in storage if exposed to sunlight through shop windows.

Applications and Comparisons

Common applications include vehicle and boat storage covering, equipment and lumber protection, ground cover or drop cloth, temporary roof repair or window sealing, woodpile and hay bale covering, camping shelter or rain fly, and construction site material protection.

Compared to 3.5 mil light-duty versions, this 5 mil offers better durability and longer lifespan. Brown 5 mil versions (T1620BB90-BRN) provide identical specs in earth-tone color for applications where blue stands out too much. Heavy-duty options (10+ mil) in silver/black colorways are available for multi-year outdoor use.

The 5 mil thickness represents the middle ground — tough enough for job site abuse but light enough for one person to handle. Some contractors note that while suitable for general purposes, they may not be ideal for heavy-duty or long-term applications where extreme conditions demand thicker materials.

FAQ

Q: How does the cold weather flexibility compare to standard tarps?

This tarp remains pliable in freezing temperatures, unlike standard polyethylene tarps that become brittle and crack. Customer reviews specifically confirmed it “stayed flexible in cold weather as advertised”. The 5 mil thickness provides durability without the rigidity that makes heavier tarps unworkable in winter conditions.

Q: What’s the actual coverage area accounting for tie-down overlap?

The tarp measures 20 ft x 30 ft providing 600 square feet of coverage. Figure on losing about 6 inches per side for proper tie-down overlap, giving you roughly 19 x 29 feet of usable coverage area (551 square feet). Grommets are spaced every 3 feet around the perimeter, so you’ll have 20 total attachment points.

Q: How long will this tarp last in typical construction use?

As a medium-duty tarp suitable for short-to-medium term seasonal storage, expect one to two seasons of regular construction site use. Professional reviews note these tarps last 3 to 4 times longer than standard tarps when used outdoors, though this refers to the heavier 8 mil versions. The 5 mil construction trades some longevity for better cold-weather handling and lower cost.