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Endura Flap Designer Pro Series Pet Door for Walls (Frames Only) - Installation Instructions

Installation Instructions

installation video image
Installation icon Printable Version
Installation icon Difficulty High
Installation icon Steps 13
Installation icon Time Required 2-3 hours
Installation icon Sections 04
Installation icon Flags 02


  • 1 Inside Frame
  • 1 Outside Frame
  • 1 Locking Cover
  • 1 Cutout Template


  • Pencil
  • Hammer/Mallet
  • Measuring Tape
  • Electric Drill
  • Safety Gear
  • Stud Finder
  • Drywall Knife (or other for cutting inner wall)
  • Saw for Cutting Outer Wall (compatible with your wall material)
  • Razorblade (for trimming tape)
  • Philips Screwdriver
  • Straight edge
  • Level

Read instructions & notes thoroughly before installation. We recommend a licensed, bonded and insured contractor do this work.

Step 1 Measure Your Pet

  • Measure your pet and make a mark at least 3” above your pet’s height on your wall, this will line up with the top of the cutout.
  • Depending on pet height and the height of your baseboards you may need to cut into the baseboards to install the frame. If you want to avoid that, make sure to set the height accordingly.

Step 2 Prepare Wall for Installation

rough cutout dimension chart
rough cutout dimension chart
make rough cutout
  • Find a location clear of plumbing, electrical and other obstructions. If you have stud construction choose a spot against one stud when possible.
  • Use the included cutout template to mark out the rough opening in the wall. Make sure your lines are level. This cut out will leave space for the tunnel material.
  • Double check your template dimensions with the chart before cutting into your wall.

Step 3 Make the Rough Cutout

  • Cut through your wall with the appropriate tools.
  • In some cases, you may have to cut and brace a stud. See local building codes to ensure this is done properly. We recommend hiring a professional if you are unsure what to do.
  • Remove insulation inside the wall as needed. You can save some to put back into open areas of the wall cavity.

Step 4 Add a Bottom Support Stud

  • The step won't be necessary for most cinder block walls.
  • Add a bottom support stud between the studs in your wall.
  • Add any other supports or bracing as needed.

Step 5 Create A Tunnel Liner Box

  • Create a tunnel liner box using 1/2" plywood.
  • The depth should be 1/8" less than the thickness of the wall.

Step 6 Attach the Tunnel Liner Box

  • Insert the tunnel liner box into the rough cutout opening. Use shims to get the tunnel level and square.
  • Use wood screws and/or concrete screws to attach the tunnel box to a nearby stud, brick, concrete, or bottom support.
  • Trim off shims flush to the wall. You can score with a knife then snap them off.

Step 7 Apply Spray Foam Sealant

  • If needed, use spray foam sealant to fill any gaps around the tunnel box.
  • Once the sealant dries, trim off any excess.

Step 8 Seal the Tunnel

  • Use an outdoor rated paint to seal any exposed wood in the tunnel.

Step 9 Screw in the Frames

  • Make sure the four tabs are upright and snug to the inside frame. You may have to loosen the screw to rotate it into place using a Phillips screwdriver.
  • Insert the inside frame and level it. While holding the frame flush against the wall, use four wood screws to screw the mounting tabs to the inside of the tunnel.
  • If there are larger gaps you can pre-bend the mounting tab toward the tunnel.

Step 10 Install the Outside Frame

  • Repeat installation step #10 for the outside frame, making sure the flap(s) swing through both frames without interference.

Step 11 Seal the Inside Frame

  • From the outside, apply silicone in the tunnel, around the sides and bottom edges of the inside frame. This will seal the tunnel to prevent water intrusion.

Step 12 Seal the Outside Frame

  • Apply silicone where the outside frame meets the exterior wall on the top and sides, but leave the bottom open to allow for drainage.

Step 13 Add Home Trim

  • Add trim to the interior frame to suit your home design.
  • Use caulking and paint as desired