This double-sided, under-door option is our top choice for strong insulation on both sides of a door—and for situations where floor care and a light touch are important.
Installation is a cinch: Unlike adhesive or screw-in models, it slides easily under the door and stays in place, so sticky residue or holes in the door when removed. Its soft foam also slides over wood and tile floors without risk of scratching them. As a bonus, its two-sided coverage blocks light and muffles sound inside and out.
Made with durable foam tubes on both sides, it covers interior doors up to 38 inches wide, which is wider than most, and cover gaps of up to 1.4 inches, also taller than most. Plus, it comes in four colors (black, brown, gray, and white) and three different door lengths, from 30 to 38 inches. Just be sure to measure your door’s thickness in addition to length and gap for this one: It only fits doors 1.375–1.75 inches thick.
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