Endura Flap Pet Door For Doors (Double Flap) - Installation Instructions

Installation Instructions

Installation icon Difficulty High
Installation icon Steps 14
Installation icon Time Required 2-3 hours
Installation icon Sections 06
Installation icon Flags 04


  • 1 Installation Template
  • 8 Hole Plugs
  • 4 2-1/4" (5.7cm) Screws
  • 1 Locking Cover
  • 2 Flap Frames
  • 4 Tunnel Pieces
  • 1 Tube of Silicone
  • 4 2-3/4" (7,0 cm) Screws


  • Pencil
  • Drill with 3/8" (9,5 mm) drill bit
  • Level
  • Measuring Tape
  • Jigsaw or Reciprocating Saw
  • Phillips head screwdriver
  • Rubber Mallet (or hammer and block of wood
  • Safety gear, mask, gloves & clamps recommended

Please read instructions & notes thoroughly before installation.

Double Flap Door Mount

Step 1 Measure your Pet

  • If you have not yet measured your pet, watch this video to ensure the pet door will work.
  • If possible, remove the door from its hinges using a screwdriver and hammer to tap out the hinge pins. Lay the door flap for installation
  • Tape the provided template to the door. The top edge of the cut-out line should be at least 2" (3.2 cm) above the dog's shoulders
  • Be careful not to cut too close to the bottom of the door as your may reduce the door's strength
  • Level the top edge of the cut-out line

Step 2 Drill Holes

  • Once you are certain the pet door will work with your door, drill through the holes marked on the template with a 3/8" (9,5 mm) bit
  • Make sure your drill is kept level and drills all the way through the door

Step 3 Trace Template and Cut Door

  • Draw lines to connect the outsides of the holes using a straight edge and/or level, then cut along the line with a saw
  • If your door is less than 1 3/8" (3,5 cm) thick, see special instructions on pages 4 & 5

Step 4 Check Weather-Stripping

  • Ensure the weather-stripping is firmly pressed in the groove on both frames.

Step 5 Apply Silicone & Position Frames

  • Apply silicone along the inside of the tunnel where it mates with the flap frame. Run a bead of silicone around the edges of the tunnel where it will meet the other frame
  • Place the inside frame with the tunnel on the inside of the door to sandwich with the other flap frame. Take the exterior frame (without the tunnel) and place it on the outside of the door.

Step 6 Select Screws & Insert

  • Select appropriate screws and insert into the pet door from the inside. Short screws for 1 ¾" (4,4 cm) thick doors Long Screws screws in doors 1 ¾" – 2 ¼" (4,4 cm – 5,7 cm) thick
  • Do not fully tighten screws until all four screws are inserted and the pet door is leveled

Step 7 Tighten Screws

  • Once the pet door is leveled, tighten the screws so that the weather-stripping compresses and the frames touch the door.
  • Do not over tighten.

Step 8 Insert Hole Plugs

  • Use the wooden end of a hammer, rubber mallet, or other non-metal tool to tap in the hole plugs.
  • You can also place a wood block on the hole plug and tap the block with a hammer.


Make sure that you double check the total thickness of the door as the single and double flap models fit different ranges. The single flap fits doors from ½” – 1 ¾” (1.3 cm – 4.4 cm) thick and the double flap fits doors 1 ¾” – 2 ¼” (4.4 cm – 5.7 cm) thick. If you are using the double flap and your door is less than 1 ¾” (4.4 cm), you will need to build out with shims or weather-stripping to get the door to at least 1 ¾” (4.4 cm) in thickness for a tight fit.


The best way to install the pet door is to have it straddle the recessed area of one of the panels. Have the pet door sit on the flat area in the middle, side, and below the recessed panel. The frame will cross the recessed area on the top, so you will be left with a gap. The easiest way to fill this gap is to get battens or shims from a local hardware store, and cut them to fit. When that gap is mostly filled, caulk the remaining areas to seal the doggy door to the surface of the people door. If the space is very irregular you can also use a squishy foam weather stripping, which will compress down for a tight fit. When finished, use caulking to seal the door.