Plywood grades explained: MR, BWR and BWP

Plywood grades describe how well the boards resist moisture. Matching the grade to the location is the single biggest factor in how long your furniture lasts.

The three common grades

• MR (moisture resistant) — for dry interiors such as wardrobes and bedroom furniture.
• BWR (boiling water resistant) — for kitchens and areas with occasional moisture.
• BWP / marine (boiling water proof) — for sink cabinets, bathrooms, exteriors and anywhere wet.

Plywood vs MDF vs HDHMR

Board	Strengths	Watch out for
Plywood	Strong, holds screws well	Higher cost for premium grades
MDF	Smooth for painting and routing	Weak against moisture
HDHMR	Dense, moisture resistant, flat	Heavier; needs proper hardware

Tips

• Check the brand's authenticity code or app where offered.
• Seal all exposed edges with edge banding or lipping.
• Use soft-close hinges and channels rated for the shutter weight.