Schluter Kerdi on regular drywall
I’m going to use the Schluter Kerdi system for my shower, mainly because it’s less work and seems more fool proof than the traditional mortar bed. Prior to this, I always considered waterproof drywall a must in the bathroom. The manufacturer says regular drywall is fine because the Kerdi membrane is waterproof. Looking for opinions, would waterproof drywall behind Kerdi membrane be insurance or overkill?
If Kerdi over regular drywall is acceptable, is it preferable to waterproof drywall alone for the rest of the bathroom? The advantage I see is that the membrane is continuous around corners, unlike Hardie Backer or DensShield.
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