Double doors can be very difficult to secure because of how they close.
Securing double door garage.
Make sure the door from your garage into your house is as secure as your front door ensure you have a strong sturdy door made out of solid core wood or reinforced steel and install an anti kick device like door armor on it.
Use the smallest tie you can find.
If your trolley has a pair of holes you can make a garage door lock with the release and a small plastic tie.
However when you use this special extremely effective system you can keep double doors firmly together without any problems.
Garage door side lock.
Simple items to secure garage door.
Easy diy shed garage door security bar.
Instead two parts must come together and lock with one another.
These methods are inexpensive and fast.
The plywood is fastened to the cleat with just two brad nails so it can break away rather than do damage if it runs into something while the door is traveling.
Secure lock garage door from inside.