What this guide helps you decide
On a windy day, note whether the draft is at the meeting stile, jamb, threshold or surrounding trim. A draft around trim may point to the rough opening rather than the moving panel.
Start with the existing conditions
Check visible track debris, rollers, panel alignment, latches and worn weather seals. Cleaning the track can help an otherwise sound door seal correctly.
Plan materials, layout and access
Inspect accessible exterior caulk and drainage without plugging weep holes. Adding thick stick-on seals can interfere with roller operation or trap water.
Check the result and plan follow-up
Address alignment and drainage first, then choose the correct replacement weatherstripping for the exact door system. Test the door's full travel and locking after a change.
Common mistakes to avoid
- Blocking sill weep holes
- Installing generic foam that jams the door
- Assuming every draft comes from the glass
Tony’s Pro Tip
Place a small strip of tissue near several edges on a windy day to map the draft, then stop before disassembling the heavy glass panel.
Should you DIY or hire help?
Hire a door specialist for damaged rollers, failed insulated glass, frame distortion or water entering the track area.
Keep planning with related guides
Need a second set of eyes?
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Request a Free EstimateGeneral homeowner education only; not a substitute for a site inspection or manufacturer instructions. Local code, permits and applicable licensing may affect the correct approach. © 2026 My Neighborhood Handymen. All rights reserved.