And a combination of those two things might work.
Seal drafty sliding glass door.
Tilt the top of the sliding door out far enough to clear the frame.
Sliding glass door weather stripping covers gaps up to 1 wide strong adhesive.
Placing a rug in front of the door.
When you are using a patio pet door insert the sliding door does not seal with the fixed panel.
Draft sealer for sliding glass doors and windows blocks wind draft and cold air wide gap range.
The draft sealer is a 3 wide 1 16 thick heavy duty rubber weather seal that has a peel back self adhesive strip.
Use it to seal the gap between your sliding door and the fixed non sliding panel.
Adheres to the sliding door regular door or window frames for a secure fit.
Identify and locate the.
Weatherstripping stops drafts cold unscrew and remove the header.
Heavy duty stapler seal the exterior of a sliding glass door to prevent drafts.
Use a caulking gun to insert foam insulation into the upper frame of the sliding doors without impeding the sliding.
Then lift the door up and off the.
Things you will need apply weather strips to the inside and outside of the door jamb where the door slides to latch.