Doors & Flush Doors · Material Guide
Best Plywood for Doors
The right plywood for a door depends heavily on where that door hangs — an interior bedroom door has very different needs from a kitchen, bathroom or exterior gate.
Matching Grade to Where the Door Hangs
Interior Doors
MR or commercial grade plywood is generally sufficient and cost-effective for bedroom, living room and interior passage doors.
Kitchen & Utility Doors
BWR grade handles the occasional splashing and steam a kitchen or utility door faces without the full cost of marine grade.
Bathroom Doors
BWP marine-grade plywood is essential here — bathroom doors face the most sustained moisture exposure of any door in the house.
Exterior & Gate Doors
BWP grade paired with a weatherproof finish and a thicker sheet handles direct sun and rain exposure on gates and exterior doors.
Thickness Matters as Much as Grade
Interior doors typically use 30–35mm construction, while exterior and security doors benefit from stepping up further for extra rigidity.
Grade First, Then Finish
Once the core grade is right for the door's location, the face finish — laminate, veneer or paint — is what determines the final look. See our marine plywood guide for BWP grade specifics, and our MR vs BWR vs BWP grade guide for choosing between the three.
Frequently Asked Questions
What grade of plywood is best for an interior door?
MR or commercial grade is generally sufficient for interior doors in dry rooms, since they don't face the sustained moisture exposure that kitchens or bathrooms do.
Do bathroom doors need a different plywood grade than bedroom doors?
Yes — bathroom doors need BWP (boiling waterproof) marine-grade plywood, since they face far more sustained moisture than a bedroom or living room door ever will.
What thickness of plywood is used for doors?
30–35mm is typical for interior doors, with thicker construction recommended for exterior and security doors that need extra rigidity and durability.
Can the same plywood grade be used for both interior and exterior doors?
It's not recommended — exterior doors face direct weather exposure and generally need BWP grade with a weatherproof finish, while interior doors can use a lower, more cost-effective grade.
Is commercial plywood good enough for a passage door?
Yes, for a dry interior passage door with no moisture exposure, commercial grade plywood is a reasonable, cost-effective choice.
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