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Exterior Door Drafts: Causes & Simple Fixes | EPHI

Exterior Door Drafts: Weather stripping, Sweeps, and Thresholds Explained

A drafty exterior door can make an entryway uncomfortable and allow outdoor air, moisture, and dust into the home. The cause may be a worn seal, a damaged sweep, a threshold problem, poor alignment, or a door for exterior door drafts that no longer fits the opening well.

Weather stripping Seals the Sides and Top

Weather stripping creates the seal between the door slab and the frame. When it is compressed, torn, missing, or uneven, light and air can pass around the sides or top of the door.

The Door Sweep Seals the Bottom

The sweep closes the gap between the door and the threshold. A worn or poorly fitted sweep can allow cold air, insects, water, or debris into the home at the bottom of the entry.

Thresholds Need Solid Support

The threshold must sit correctly so the door can close and seal against it. Settling, wear, moisture damage, or a poor fit can create gaps that simple weatherstripping will not fully solve.

Alignment Affects the Seal

Hinges, latches, and the strike plate help the door close in the correct position. If the door rubs, sags, or does not latch tightly, the weather stripping may not contact evenly around the opening.

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