Marine, BWP & Waterproof · Bathroom
Marine Plywood for Bathroom Interiors
Bathroom furniture faces more sustained moisture than almost anywhere else in the house, which is exactly the environment marine-grade plywood is built for.
Three Bathroom Applications
Vanity Cabinets & Shelves
Constant proximity to the sink and splashing makes marine-grade plywood the sensible choice for vanity carcasses and open shelving.
Partition Walls
A plywood partition separating a wet and dry zone within the bathroom needs marine grade on at least the wet-facing side.
False Ceilings
Bathroom humidity rises, making the ceiling area more exposed to moisture than it might seem — marine grade avoids sagging and mould issues over time.
Choosing the Right Sheet
Check for genuine certification (BWP/marine grade stamp), confirm anti-termite treatment if the bathroom is on a ground floor or in a termite-prone area, and match the thickness to the specific application — thinner for shelving, thicker for structural cabinet carcasses.
Don't Forget the Door
Bathroom furniture and the bathroom door face the same moisture challenge — see our flush doors for bathrooms guide for that specific application, and our marine plywood range for our in-stock options.
Frequently Asked Questions
What plywood grade should be used for bathroom cabinets?
Marine or BWP grade is recommended, since bathroom cabinets face sustained moisture exposure that a standard MR-grade sheet isn't built to handle.
Does bathroom ceiling plywood need to be waterproof too?
Yes — bathroom humidity rises and affects the ceiling area more than it might seem, so marine or BWP grade helps avoid sagging and mould issues over time.
Can standard plywood be used for a bathroom partition?
It's not recommended for the wet-facing side — marine or BWP grade should be used at minimum where the partition faces direct moisture exposure.
Should bathroom plywood also be termite-treated?
It's a good idea, especially on ground floors or in termite-prone areas — ask specifically for a sheet that combines marine/BWP grading with anti-termite treatment.
What thickness of marine plywood is used for bathroom shelving?
12-16mm is typical for open bathroom shelving, while thicker sheets (18-19mm) suit structural cabinet carcasses that carry more weight.
Need the Right Board for Your Project?
WhatsApp us your requirement and we'll recommend the right grade and thickness.