This 20 x 28 ft / 6 x 8.5 m greenhouse polyethylene film covers a full residential DIY hoop-house build or a small-market grower's low tunnel in a single panel—eliminates the mid-roof seam joints that become the leak-and-tear point in spliced installs, where condensation pools and winter wind finds the weakness first. 6 mil / 0.15 mm thickness survives wind-flap abrasion across a full 4-season cycle, outlasting 3-4 mil hardware-store contractor poly that tears at the rafter rub-line within one season and forces emergency mid-winter re-cover. UV-resistant additive slows photodegradation so the clear film doesn't yellow, stiffen, or turn brittle by end of summer the way untreated contractor poly does. Retains heat at night for seedling protection and season-extension crops (late tomatoes, overwintered greens, early starts), transmits the full light spectrum, and resists dust accumulation that would shade the crop below. Multi-purpose: construction / masonry drop cloth, dust barrier, landscaping weed-block, lawn slip-and-slide, emergency rain tarp. Unfolds from roll form and refolds for off-season storage. DIY install with greenhouse clips or batten strips. Thickness 6 mil / 0.15 mm; dimension 20 x 28 ft / 6 x 8.5 m; material polyethylene; DIY install.