Poor door weather sealing wastes energy and allows water damage. Here's how to assess and fix sealing issues on exterior doors.
Window and Door Replacement
Exterior doors are a primary source of air infiltration in Canadian homes. Worn weatherstripping, damaged door sweeps, and compromised thresholds allow cold drafts in winter, significantly affecting comfort and energy bills.
The door frame is sealed by three weatherstripping components: head (top of the door), jamb sides (left and right), and the door sweep or threshold at the bottom. Each needs to create a complete seal when the door is closed.
Energy Efficiency and Style
Test your door sealing by passing a lit candle slowly around the door perimeter (with the door closed) on a windy day. Flame disturbance indicates air movement. A sheet of paper held at the frame and then pulled — with resistance — indicates good contact.
Weatherstripping types include foam tape (low-cost, low-durability), V-strip (durable, for sides of doors), compression bulb (highly effective, visible but durable), and magnetically held seals (excellent for steel doors).
Getting a Free Estimate
Door sweeps seal the bottom of the door against the threshold. Basic brush sweeps are replaced easily; automatic door bottoms retract when the door opens and lower when closed — ideal for thresholds with height irregularities.
Threshold condition matters. Worn thresholds with the insert compressed flat no longer create effective seals. Replaceable inserts or full threshold replacement restores seal integrity.
Air sealing around the door frame — the gap between the rough frame and door jamb — is often neglected. Spray foam or caulking in this cavity prevents cold air from bypassing the weatherstripping entirely.
Key Takeaways
- Exterior doors are a primary source of air infiltration in Canadian homes.
- Test your door sealing by passing a lit candle slowly around the door perimeter (with the door closed) on a windy day.
- Door sweeps seal the bottom of the door against the threshold.
- D&D Exterior Finishing serves Kitchener, Waterloo, Cambridge, Guelph and surrounding areas
- Get a free no-obligation quote — call or book online anytime
Sources & References
- Ontario Building Code — Relevant Standards & Guidelines
- D&D Exterior Finishing field experience across Waterloo Region
