If the polythene does stretch you will see that it will do so from two sides of the stretch.
How to make a dog door lock.
Buy an appropriately sized door.
How to make a doggie door burglar proof step 1.
Often times overly extra large pet doors are purchased for smaller dogs or cats.
Don t switch to an electronic door.
It s a pretty good rule though you can probably shave a little off the width if needed.
A far better deterrent for door crossing burglars is an old fashioned lock and key.
Consider automatic pet doors.
Not only can this be a concern.
Make the flap for the doggie door using a rubber auto floor mat.
Measure the height of the opening and add 1 1 2 inches to allow for attaching the flap at the top of the opening.
A cheap and easy way to make a dog door.
The dogs were slow at first but.
I used clear vinyl runner material from hd and some peel and stick magnetic tape.
This is not a foolproof solution however for those times when you re out of the house as the presence of an intruder will no doubt bring the dog close enough to the doggy door to trigger its unlocking.
Rule of thumb is to make the door two inches wider than your dog at her widest point and two inches longer than the height of her torso with the bottom of the dog door an inch below the bottom of her torso.
An electronic dog door requires your pet to wear a transmitter on her collar.
Install your pet door in a.
Electronic doggy doors use a microchip you can place on your dog s collar the door only unlocks when the dog or cat is nearby.
To lock the pet door the section that you cut from the door can be fitted into the frame and secured by bolts.
With a piece of polythene cut off the piece you will be using for the pet door hinge.
These doors are also not meant to withstand intruders intent.
This is a basic key less lock.
6 tips for a burglar proof doggie door.