01
Sizes on the rack
5/8" MoldBloc — 4×8, 4×12
1/2" MoldBloc — 4×8, 4×12
Stocked
Drywall · 3 of 7
Moisture and Mold-Resistant Board
For the rooms that get wet. Not a substitute for cement board where tile goes in a shower.
OUTWEST1995Five Colorado yards.
One outfit.
02
Where it goes, and where it does not
Bathrooms, laundry, kitchens, basements, anywhere humidity runs high or a leak is likely. It resists mold growth on the face and core. It does not resist standing water, and it is not a tile backer inside a shower or tub surround — that is cement board or glass-mat backer, and inspectors in Colorado will call it.
03
Manufacturers
American Gypsum — MoldBloc
Common questions
Ask the counter.
Is this the "green board"?+
It replaced it. Green board was moisture-resistant only. MoldBloc is moisture and mold-resistant, and it is what the trade uses now.
Can I tile a shower on it?+
No. Use cement board or glass-mat tile backer inside the wet area. MoldBloc is for the rest of the bathroom.
The branch makes the call