I want to put in a bi-fold door from the kitchen to the
laundry/utility/pantry space. I saw some in a Big Box ad the other day,
which noted there were three standard sizes to choose from, I don't
remember exactly, but let's say 30 ", 32" and 36". So I measure the the
opening, which matches the height given in the ad (80" I think), but the
width of the opening is 35 5/8". There is a track at the top of the
space, I assume from an old door, and a bit of hardware in one bottom
corner of the doorway. The floor is a miscellany of adhesive tile over
cement slab.

Can I buy the 36" door and cut it 3/8" off one edge? Which machine would
do this correctly? Would they do this for me at the Big Box, or would I
be pestering the neighbor, who seems to have Tools? Hire a handyman,
which the mister is not? Is it likely the existing track would fit a new
door? How would I cut the track to fit, if this were necessary? How
exactly is a bi-fold door attached, anyway? And I would want to latch
this door shut to repel kids and dog, but put in a cat flap to allow the
cat access this space.

One of those things that seems easy enough, until you actually get it
home, which is what I'm trying to avoid...

Thanks,

Karen