There are a few unusual factors that can cause your door open by itself.
Osb over garage door opening.
These things can leave you at the mercy of a lo.
We always build garage beams with 2x12 s and 1 2 osb usually on a 16foot opening a 2x12 with a 2x6 on top will suffice put a rip of osb in between with plenty of construction adhesive and nails and on the other side reverse the 2 x s 2x12 on top of 2x6 on one side 2x6 on top of 2x12 on the other this will leave you with a beam about 14 3 4 tall enough for a standard 7 garage door on an 8 wall.
Set on sill plate.
Residential electric garage door openers manufactured after 1993 are equipped with two safety mechanisms that operate while the door is closing.
The first is photoelectric and the second is mechanical.
For instance if the width of the garage door is 8ft the rough opening should be 8ft 3 inches wide.
First cut two pieces of 2x12s to the desired length for your door opening.
Use a sealer on bottom of them up 4 each side and edge.
Garage door locked from the outside.
Find the studs along the wall of your garage above the garage door and mark them with blue painter s tape.
Screws every 12.
Ever forget your keys to the house or even lost your garage door remote.
Create the header board by using a piece of osb and two 2x12s.
This will prevent the osb from sticking out from either end of the header.
Width of garage door opening standard widths are 8 9 10 12 14 16 17 and 18 height of the garage door opening standard residential heights are 7 7 6 8 header the header is ideally a minimum 12 wide micro laminated beam that spans the width of the garage door opening.
Then cut the osb to a length that is slightly shorter than the two 2x12s.
You get the picture.
Pre drilling pilot holes much smaller diameter than the lag screws but still prevents cracking and destruction of the studs is a great plan to do on the wall and on the shelf before you put it up.
The width of the rough opening should be 3 inches greater than the width of the garage door you are purchasing.
Building headers over the garage doors.
Yes it s possible although rare for your garage door to open by itself.
Once we installed that sheet we replaced the bracket and removed the strap.
When the strap holding it in position we removed the bracket and continue with installing the osb.
I would leave a 1 8 expansion gap or just use 1 2 reg ply sheer.
If it s 9ft the opening must be 9ft 3 inches and so on.
Align the three boards together and attach them with 12d.
Here are a few scenarios we ve come across.