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Endura Flap Severe Weather Vinyl Sliding Glass Dog Door - Installation Instructions

Installation Instructions

Click to view the Single Flap Vinyl Sliding Glass Pet Door Instructions.

Installation icon Printable Version
Installation icon Difficulty Easy
Installation icon Steps 10
Installation icon Time Required 0.5 hours
Installation icon Sections 01
Installation icon Flags 01


  • 1 Vinyl Panel Pet Door
  • 1 Weatherstrip Seal Roll
  • 1 Center Post Weather Seal Draft Stopper


  • Flathead screwdriver
  • #2 Philips head screw driver
  • Non-metal hammer
  • Scissors

Please read instructions & notes thoroughly before installation. If you need to adjust the step-over, complete steps A-F prior to installing the panel in your track.

Step 1 Loosen Height Adjustment Locks

  • Note: Horizontal Cross pieces have Edge Guides on each end. Carefully remove these parts and keep them together. This will help with assembly and orientation and when reassembling the piece.
  • Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.

Step 2 Insert Panel Into Track

  • Insert the panel into the upper track of your door frame, push the panel into the spring mechanism, then swing the bottom of the panel up and over the threshold into the lower track rail.
  • If you can’t clear the track, try swinging in from the outside, as the outside track wall may be shorter. If the panel still doesn’t fit, see the FAQ for guidance.

Step 3 Apply Weatherstrip

  • Once you are confident that the panel fits, remove the panel from the track and lay it on its side on the ground.
  • Apply the foam weatherstrip seal by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres. Install on both sides and trim to fit with scissors.

Step 4 Place Panel In Track

  • Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place.

Step 5 Install the Draft Stopper

  • The center post weather seal strip (draft stopper) should be installed on the inside of the home.
  • It can install on either the back edge of the sliding door panel or the leading edge of the stationary panel.
  • This strip prevents air from leaking between the sliding glass door and the stationary panel.
  • Trim with scissors as needed. Clean the edge of your patio door with rubbing alcohol before installing to assure a good seal.
  • Repeat step two to install the panel in your track.

The following steps are only applicable if you need to adjust the step-over height. Complete these steps prior to installing the panel in your track.

Step A Separate Flap Frames

  • Lay the entire panel on a flat surface. Use a #2 Philips head screwdriver to unscrew the four frame screws from the flap frames to separate them, then set them aside.

Step B Loosen Side-Screws

  • Loosen both the middle and bottom sets of side-screws by one turn.

Step C Adjust Stepover Height

  • Once the bottom and middle side-screws are loosened, slide the spacer(s) down to the bottom of the panel. Pull the adjustable seal extrusion(s) down and out to place it between the adjustable spacer and the adjacent crosspiece.
  • You can move the spacer(s) above or below the flap to raise or lower it until the desired flap height is achieved.

Step D Replace Side and Middle Screws

  • Once the desired flap height is achieved, replace and tighten the bottom side-screws and tighten the middle side-screws.

Step E Reattach Flap Frames

  • To reinstate the pet door assembly, sandwich the interior and exterior frames on either side of the pane how they came. Insert the four frame screws through the pet door frames.
  • Do not fully tighten the screws until all four are inserted and the pet door is leveled.
  • If the white connector pieces fall off of the Bottom Crosspiece, this step's diagram pictures how to orient the connector back onto both sides of the Bottom Crosspiece.

Step F Add Hole Plugs

  • Use the wooden of a hammer, a rubber mallet, or another non-metal tool to tap the hole plugs over the eight exposed frame screws.

How to Adjust Stepover Height


What if my panel is slightly too tall?

You can trim up to 5/16" off the spring-loaded adjustment piece at the top. Remove the adjustment piece with a #2 Philips head screwdriver and use scissors to cut down the flanges. Be careful not to cut too low.

What if my panel is slightly too short?

We ofer height extensions that will add 1 1/2" to the top of the panel that you slide into the channel at the top. These are made from the same vinyl as the panel so the color will match exactly. If the extension makes the panel feel unstable, you can secure it with screws.

What if the panel is wobbling slightly back and forth?

If your track is wider than 1 1/2", you can use small wooden shims or extra weather-stripping to fill the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.

Locking Your Door

Since you cannot lock your sliding glass door to the panel, we have provided you with a sliding door clamp lock to secure your home.

Installing the sliding door clamp:

This clamp as a screw that tightens by hand to prevent the sliding door from moving beyond the clamp's placement. For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door's raised track.

If you aren't able to use the lock that comes with the panel:

A great alternative to locking your sliding glass door is a Charley bar or dowel. Both block the slider from opening. When engaged, you cannot pull the sliding door away from the pet door panel.

My slider isn't closing evenly against the panel?

Your slider may not be level, which can happen in older houses. In that case, you may be able to adjust the wheels on the slider enough to line it back up. It will depend on your door, but you should be able to adjust a screw near the bottom of the door.

Turning the screw will adjust the wheels slightly. If the slider is level then it could be an issue with the metal height adjustment lock at the top of the panel. You can also use a rubber mallet to tap the curve into a straight line.

If the height adjustment lock is hitting the edge this can mean that the bottom of the panel is going further into the jamb that it can at the top. A gap appears that gets wider as you go down the panel. You can use wood shims or weatherstripping in the jamb to push out the bottom of the panel.