There are different varieties of plywood available in the market, when buying plywoods in Chennai one needs to be aware on which grade and brand of plywood is required.
Consider the above case of MR vs. BWR grade. People often think Moisture Resistant means waterproof. However this is not the case.
Please note that MR (Moisture resistant) is of a lesser quality and cost compared to BWR grade. While it true that MR plywood can resist a certain degree of moisture and humidity, it certainly cannot be called waterproof. On the other hand, BWR plywood is a waterproof plywood.
MR is an interior grade plywood useful for making indoor furniture (office furniture, furniture where there is less application of water or moisture) while BWR plywood is exterior grade(places like kitchen, bathroom doors, furniture below water tanks or any spot where the surface is directly exposed to sunlight and water .