Can you cut down a hollow core door?
Trimming a standard door to fit a frame risks compromising its structure or exposing the hollow inside. Because custom doors can take months to arrive, people need to shorten standard sizes themselves but do not know the maximum amount they can safely remove.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
Can you cut down a hollow core door?
- 1Drill a small hole in the bottom and use a bent paperclip to feel the internal depth before cutting.Did this help you?
- 2Cut off whatever amount is needed, then salvage the solid wood bottom rail and glue it back into the newly exposed hollow bottom.Did this help you?
- 3Buy a solid wood door, which can be easily trimmed to custom dimensions without having to rebuild the edges.Did this help you?
- 4Cut a hollow core door, push back the interior cardboard, and glue and nail a new wood block into the exposed edge.Did this help you?
- 5Check local lumber yards for custom door orders, as they often have much faster lead times than big box stores.Did this help you?
- 6Carefully measure from the existing frame's latch hole to ensure hinge mortises and doorknob heights still line up after trimming.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“I have a need for a custom, interior door in my basement. I received a fair quote from Home Depot but the lead time is 3-4 months, and I really need it within 30 days.”source ↗
“would I be able to cut the door down to fit into the frame, assuming I had appropriate tools? Or would I be compromising the structure of the door?”source ↗