It's hollow. Typically it may have cardboard strips on
edge, glued inside, to provide slight siffening. But basically,
hollow means hollow.
Usually it will be plywood or pressboard 1/4" panels.
A hollow core door is only for light use, interior.
Then there's solid core, which usually mean filled with
coarse particle board. It's heavier than hollow core and
might block noise slightly better, but it's still no good
for exterior use and generally pointless.
Then there are solid wood doors, which could be panel
doors or staved wood. (Glued up pieces to make a solid
slab.) In recent years, panel doors have been coming
through cheaply made, with veneer over glued-up pieces.
A panel door meant for interior (1 3/8") used to also be
usable for exterior use where a 1 3/8" door is needed, but
that's no longer the case. They delaminate with moisture
That's the selection for wood doors.
| What does "hollow core" mean? Have been getting different answers.
| Last input from local hardware store says it doesn't mean there's nothing
in there; it means door is filled with ?? something. What?