The first area the patio doors fit perfectly.
Gap at bottom of sliding door.
The sweep is a brushy or rubberized strip attached to the bottom of the door designed to close any gaps between the door and the sill.
There is an overlap between the moving door and the fixed door where the two doors should meet up and this is where the leak is occurring.
I had a contractor install sliding patio doors in 2 different areas in my house.
It should be measured from the floor surface to the bottom of the door.
The bug strip gets installed on the side of the door opposite the lock where it seals the gap from top to bottom between the screen door and the patio door.
The door gap to the floor should be 5 8 to 3 4 inch.
I planned very hard to have a double sliding barn door installed as part of a basement finishing project.
How would you fill the gap in these sliding barn doors.
However in the second area there is a gap that leaks air.
This number is regardless of flooring.
Sliding doors slide best when a uniform gap is maintained along the edges and bottom of the door.
The gap can be different from one door to the next so you need some way of adjusting the width of the strip.
The rollers at the top can also wear down lowering the bottom of the door so that it rubs on the track.
Most sliding doors have a mechanism called an adjusting screw located at the bottom of the door ends.
Open your door approximately six inches and watch the gap between the door and frame turn the adjustment screws with your screwdriver until a uniform gap is achieved.
In these cases the problem is usually that the rollers at the bottom of the door have started to rub against the track.
Reach underneath the door and pull on the door sweep.
If each room has individual air returns the numbers can be smaller for personal taste.