Short answer
Use BWP plywood for the kitchen sink unit and anything near water, plywood for carcasses and shelves that carry weight, HDHMR for shutters and doors that need a smooth finish, and MDF only for dry, decorative or low-load pieces.
What each board is
Plywood
Thin layers of wood veneer glued with the grain in alternating directions. The layers make it strong and stable, and it holds screws well, including near the edges. It comes in grades:
- MR (moisture resistant): for dry indoor areas only.
- BWR (boiling water resistant): handles humidity and occasional water contact.
- BWP (boiling water proof) or marine: made for direct, repeated water exposure.
Look for the ISI mark on the sheet: IS 303 for general purpose plywood and IS 710 for marine plywood.
HDHMR (high density, high moisture resistance board)
An engineered board made from compressed wood fibre. It is much denser than plywood, which gives it a smooth, grain-free surface that takes laminate, acrylic and paint very well. It resists moisture, but it is not waterproof, so the edges must be sealed.
MDF (medium density fibreboard)
Also made from wood fibre, but less dense than HDHMR. It is smooth and easy to cut into shapes, which makes it popular for decorative panels. Standard MDF swells when it gets wet and holds screws poorly at the edges.
Side-by-side comparison
| Plywood (BWR/BWP) | HDHMR | MDF | |
|---|---|---|---|
| Water | BWP is waterproof. BWR is water resistant. | Resistant, not waterproof. Seal the edges. | Swells when wet. |
| Screw holding | Strong, including at edges. | Good on the face, weaker at edges. | Weak at edges. |
| Surface | Visible grain. Needs laminate or veneer. | Very smooth. Takes laminate and paint well. | Smooth. Easy to shape. |
| Weight | Lighter. | Heaviest of the three. | Medium. |
| Relative cost | Highest, rising with grade. | Usually below BWP plywood. | Lowest. |
| Best for | Carcasses, sink units, heavy shelves. | Shutters, doors, drawer fronts. | Wall panels, dry decorative pieces. |
Which board to use, room by room
Kitchen
- Sink unit: BWP plywood. It sees the most water of any cabinet in the home.
- Other base and wall cabinets: BWR or BWP plywood carcasses.
- Shutters and drawer fronts: HDHMR or plywood, finished in laminate or acrylic.
More on planning a kitchen on our modular kitchen page.
Wardrobes
- Carcass and shelves: plywood, since shelves carry weight for years.
- Doors: HDHMR gives a flat, smooth door that suits laminate and paint finishes.
- Wardrobes on a bathroom wall: BWR or BWP plywood, with sealed edges.
See how we plan them on our wardrobe design page.
Bathroom vanity
BWP plywood only. Water exposure here is daily.
TV units and wall panels
Plywood for the main body if it holds weight. HDHMR or MDF for decorative panels in dry areas.
Common mistakes to avoid
- Comparing quotes by thickness only. 18 mm MR plywood and 18 mm BWP plywood are very different boards. Always ask for the grade.
- Leaving edges unsealed. Water gets into any board through raw edges. Every exposed edge should be edge-banded.
- Using MDF under the sink. It is the most common reason kitchen cabinets swell within a few years.
- Ignoring the climate. In humid and coastal cities, choose BWP for more of the kitchen and use rust-resistant hardware.
Sources
Board properties and relative costs are based on manufacturer guidance from CenturyPly and Greenply, and on our own experience fitting kitchens and wardrobes in Bengaluru.