IronSlide -How to Measure
Measure the opening width and add 2 inches to each side this total is the width your door should be.
Measure the opening width and add MINIMUM 3 inch, this total is the width your door should be.
Measure the opening from floor to top of trim and add 1 inch this total is the height your door should be.
Measure the opening from floor to top of trim and add 1 inch this total is the height your door should be.