If you can feel air movement, or hear a faint whistle, around a fully closed sliding door, that's a weatherstripping or alignment issue letting conditioned air escape and outside air in.
On a windy day, hold your hand near the frame edges while the door is closed. A steady draft or an audible whistle pinpoints exactly where the seal has failed.
We replace worn weatherstripping and sweeps at the specific leak point, and correct alignment if the panel isn't sitting flush, restoring a proper seal rather than masking the draft.
Air leaking around a closed door is a weatherstripping or alignment issue, different from a visible physical gap you can see with the door open.
Don't just add more weatherstripping tape on top of failing seals, it's a short-term patch that often fails again quickly.
This isn't a forcing issue, but ignoring it steadily raises cooling costs and can lead to moisture intrusion over time.
Cost: $150-$280 for weatherstripping and seal replacement.
Time: 45-60 minutes typically.
Repair, replacing the specific worn seal or sweep.
Florida's long cooling season means even a small leak adds up in energy costs faster than in milder climates.
On a windy day, hold your hand near the frame edges while the door is closed to feel for drafts.
On a frequently used door with visibly worn seals, yes, it's a measurable and fixable energy loss.
Get a free quote to seal it up before your next power bill.