Standard Garage Door Rough Opening Sizes

This post is intended for purposes of clarifying how garage door sizes work and opening preparation.

Standard garage door rough opening sizes.

Big trucks bobtails and rvs are not the type of vehicles that can easily fit in a garage door of this length. Standard sizes standard garage doors in our area are 8 9 16 and 18 wide. While building a new garage it is better to check available sizes make a selection and create a rough opening according to manufacturer specifications. Standard width and height will be determined by the type of specific garage door.

A garage will need backroom that equals the door height plus 18 inches and possibly more. 99 of the residential garage doors that we run across are different than these widths. This will give you room to space the door frame off of the sub floor. On either side of the door leave a minimum 150 mm to fit the garage door hardware as door is always wider than opening.

The rough opening is equal to the size of the door but you need to figure back head and side room before choosing and installing the new garage door. Of frame is 40 x 86 as the frame face is 2 around all 3 sides. Now all you need to know is how to properly frame your door rough opening. Ordering a garage door based on a rough opening size can leave you with a door that is too big.

It should be obvious that you don t use twice the thickness for the height since you will not be putting anything on the floor but you have been reminded. Clopay wayne dalton and amarr. Use shims and or caulk to seal gaps between wall and frame. A opening width 4 1 2 b opening height 2 1 4 the rough opening would be 40 1 2 x 86 1 4 for a 3 0 x 7 0 door frame.

1 2 or 1 in one direction of the other will won t typically. In our business we refer to rough openings as the size of the opening before the finished lumber has been added to the jambs. To make my. Ensure there is a minimum of 2100mm unobstructed space to allow garage door to open correctly people often angle the roof of garage make sure at lowest point there is a minimum of 350 mm lintel headroom clearance.

Step 1 measure the old door if you are replacing an existing door with one of the same size or the new door of choice if you are building a new garage. Measure the backroom the distance from the garage door opening to the back wall of the garage. Words like rough opening are thrown around and i m not sure if we are speaking about the same thing. Standard systems require 10 inches of headroom while some require 12 inches while garage door openers often require an additional three inches of clearance.

Framing rough opening sizes are really quite simple. If you have a lot of other stuff inside of your garage and it is bigger then you may need a bigger door. You should add 2 1 2 to the height of the actual door. Typically one big door for two car garage will cost less comparing to installing separate smaller doors for.

Just add 2 to the width of the actual door size.