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Common Problem

Sliding Door Not Sealing Properly

A door can look fully closed and still not actually seal, letting in humidity, noise, and pests without an obvious visible gap. This is a step beyond a simple draft and usually points to the panel itself, not just the weatherstripping.

Most Common Causes

The Paper Test

Close the door on a piece of paper at several points along the frame. If it slides out easily anywhere, the seal isn't engaging at that spot, even though the door looks shut.

How It Gets Fixed

We identify whether the root cause is the panel, the seals, or the frame geometry, since replacing weatherstripping alone won't fix a warped panel, and correct the actual issue so the door seals uniformly.

How to Tell It Apart From Similar Problems

The door looks fully closed but doesn't actually seal airtight, different from a door with a visible gap, this failure isn't obvious by eye.

What Not to Do

Don't assume it's fine just because it looks closed, use the paper test (close the door on a sheet of paper at several points) to check.

Why Forcing It Makes Things Worse

No forcing risk, but an unaddressed seal failure lets in humidity and pests continuously without any visible warning sign.

Typical Cost & Repair Time

Cost: $150-$300 depending on whether it's the seals, panel, or frame.
Time: 45-75 minutes typically.

Repair vs. Replacement

Repair in most cases, unless the panel itself is warped beyond correction.

Why This Happens More in Florida

Florida humidity can warp panel materials over time, changing how the door meets the frame even when everything looks normal.

Related Reading
FAQ

Common Questions

How do I test if my door seals properly?

Close it on a piece of paper at several points, if it slides out easily anywhere, it's not sealing there.

Is this worse than a visible gap?

It can be, since it's less obvious and can go unnoticed for longer while still causing humidity and pest issues.

Honest Pricing Most repairs$180–$420
Free on-site estimate No trip charges Price quoted before we start

Door Won't Seal Right?

Get a free quote to find out what's really letting the air through.

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