Can you install a prehung door over floating flooring?
Installing a prehung door directly on top of laminate or luxury vinyl plank flooring risks pinning the material down and preventing its natural expansion, which can cause the floor to buckle. While some people install doors straight over the flooring without issues in small spaces, weight and restricted movement can lead to long-term problems.
Core Friction Pattern
Analysis of 3 peer accounts across online developer and community forums reveals that “Can you install a prehung door over floating flooring?” repeatedly surfaces due to edge-case mismatches between standard defaults and real-world environments. Standard troubleshooting frequently falls short, compelling practitioners to develop custom workarounds.
+4 alternative community-tested workarounds cataloged below.
What the numbers show
Counted from the threads quoted below. How we count
- People have been saying this in most months since September 2026.
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 install a prehung door over floating flooring?
- 1Placing the door directly on top of the flooringDid this help you?
- 2Using metal shims to lift the side jamb during installation and removing them afterward to create a gapDid this help you?
- 3leaving a small expansion gap around the vanity base so the floor can still moveDid this help you?
- 4installing the vanity first and finishing the flooring around it with quarter roundDid this help you?
- 5installing a floating vanityDid 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.
“Personally I wouldn't because of the weight and it may cause issues.”source ↗
“That’s my concern about what could happen down the line.”source ↗
“I knew the “right” answer was installed on subfloor not LVP but I’ve heard a lot of people haven’t had issues in smaller spaces where there likely won’t be much movement.”source ↗
“Do I need to uninstall the vanity and cut the LVP so that the vanity sits on the subfloor?”source ↗
“I'm doing flooring first, going to leave the 3/8" expansion gap next to the studs on either side of doorway. Then I was going to install my prehung door.”source ↗
“Some people say just throw the door on top of the flooring and install like normal. But that may pin it down and cause it to buckle, no?”source ↗
“Surprisngly, I actually really can't find info related to this exact predicament.”source ↗
Where this came up
People with this problem also raised
- 4Can you put new flooring over old pine boards without a subfloor?
- 2Can you put a vapor barrier under floating LVP on concrete?
- 2How to stop LVP from moving when going room to room
- 3New flooring hits the door and won't clear
- 2Installing flat door trim behind hinges and strike plates
- 2How to fix an H-pattern in installed flooring without tearing it all up