Which weatherstripping type lasts longest?

Metal V-strip and interlocking types last 15-20+ years. Rubber gaskets last 5-10 years. Foam tape lasts 1-3 years and needs frequent replacement.

How do I know if I need new weatherstripping?

Check for visible daylight around closed doors, feel for drafts, or hold a dollar bill in the door - if it slides out easily the seal is worn.

What is the best type for exterior doors?

Rubber or silicone gasket weatherstripping provides the best seal and longevity for exterior doors. Pair with a door sweep at the bottom.

WeatherstrippingGenerating image…

Insulation

Sealing

$3-$20 per door or window

Weatherstripping: Seal Doors & Windows Against Drafts (2026)

Prepared by Lumberama's Building Materials Team

|Last updated May 15, 2026|Sources & methodology

Weatherstripping consists of flexible sealing materials applied to the edges of doors and windows to block air infiltration, moisture, dust, and insects. It is one of the most cost-effective energy improvements a homeowner can make. Types include adhesive foam tape, V-strip, rubber gaskets, and door sweeps.

Key Features

Blocks air infiltration; Multiple material types; Self-adhesive options; Door and window applications; Most cost-effective energy upgrade

Specifications

Types: foam tape

V-strip (tension seal)

rubber gasket

door sweep

interlocking metal. Compression range: 1/16 to 3/4 inch gap. Temperature range: -20F to 150F for most products.

Applications

Exterior doors; Windows; Attic hatches; Garage doors; Basement doors

Installation Overview

Clean surfaces thoroughly with rubbing alcohol. Measure and cut weatherstripping to length. For adhesive types, peel and press firmly. For V-strip, nail or staple in place. For door sweeps, screw to the bottom of the door. Test closure for proper compression.

Pros & Cons

Pros

✓ Very cost-effective; Easy DIY installation; Immediate energy savings; Blocks drafts and dust; Multiple types for any gap

Cons

✗ Wears out and needs replacement; Adhesive types can peel; Some types compress permanently; Must match gap size accurately; Can interfere with door operation

Top Brands

Frost King

M-D Building Products

Duck Brand

Code Requirements

IRC N1102.4.1 requires sealing of building envelope. Weatherstripping at doors and windows is one method of compliance. Energy code requires blower-door testing in many jurisdictions.

Buying Tips

Measure the gap before buying - too thin will not seal, too thick will prevent closure. Replace all four sides at once for consistent sealing. Door sweeps are the most impactful single improvement for drafty doors.