Greenboard, Purple Board, or Cement Board for Bathroom Walls?
Introduction Choose wallboard by the water exposure at that exact location—not by board color or perceived toughness. Greenboard and purple board are gypsum-based categories whose approved uses vary by product. Cement board is a durable tile backer, but it is water-resistant rather than waterproof. Related guidance: Is Oil Based Paint Waterproof?. For ordinary bathroom walls, […]
Greenboard, Purple Board, or Cement Board for Bathroom Walls? Read More »










