A door that whistles only on windy days is often revealing where outside air squeezes through a small gap. Replacing every seal with thicker material can make the door hard to latch, so identify the leak first.
QUICK STEPS
If you need the short version, try these steps first.
- Close and latch the door normally.
- Feel around the top, sides, and threshold for moving air.
- Inspect weatherstrip for flattened, torn, or missing sections.
Before you continue, check these safety points.
- Do not alter fire-rated door assemblies without following manufacturer requirements.
- A door that will not latch securely needs hardware or alignment attention.
Trace the leak around the closed door
On a windy day, use your hand to feel for a draft around the perimeter and note where airflow is strongest.
- Close and latch the door normally.
- Feel around the top, sides, and threshold for moving air.
- Inspect weatherstrip for flattened, torn, or missing sections.
- Check whether the door rubs or needs extra force to latch.
- Match damaged seal profile or address alignment if the gap varies.
Thicker weatherstrip can create a closing problem
A seal that is too thick can keep the latch from engaging fully or load the hinges unnecessarily.
A moving frame or loose hinges need repair first
If the gap changes when you lift the door or the frame moves, correct the hardware issue rather than stacking foam over it.
Before you call it done
- Draft location is identified
- Weatherstrip is checked for damage
- Door latches securely without excessive force
- Loose hinges or frame movement are addressed first