Honestly, I get the logic behind using green board as a “just in case” move, but I’ve seen it give people a false sense of security. It’s still not waterproof—just a bit more resistant. If you’ve got real moisture issues or leaks, green board won’t save you from mold or rot in the long run. I’d rather focus on fixing airflow and plumbing up front than rely on a slightly tougher drywall. Maybe that’s just me being stubborn after too many bathroom gut jobs... but I’d rather do it right once than patch over problems later.
Maybe that’s just me being stubborn after too many bathroom gut jobs...
I get what you’re saying about airflow and plumbing being the real priorities. I used green board in a small bathroom reno mostly because it fit my budget, but I kept wondering if it was just a placebo. Is there any scenario where it actually pays off, or is it just a marketing thing? I feel like “a bit more resistant” isn’t all that reassuring when you’re worried about leaks behind the wall.
Green board’s kind of a weird middle ground, isn’t it? I did a ton of research before my first bathroom reno and kept seeing mixed opinions. It’s definitely not a substitute for proper waterproofing—if there’s a real leak, green board won’t save you. But in areas with just occasional humidity (like above wainscoting or on the ceiling), it might buy you a little extra time before things get gross. Still, if you’re tiling a shower or anywhere water could sit, I’d go with cement board every time. Green board just feels like a compromise that doesn’t solve the big problems.
Green board is definitely a weird in-between. I get why people use it—it's cheaper than cement board and feels like “doing something extra” for moisture. But yeah, you nailed it:
I learned that the hard way after a leaky pipe behind my bathroom wall... had to rip out everything anyway. For places that just get steamy, sure, but anywhere near water? Cement board’s worth the extra bucks. Sometimes saving a little now just means paying more later.“if there’s a real leak, green board won’t save you.”
Cement board’s worth the extra bucks. Sometimes saving a little now just means paying more later.
Yeah, I get what you mean about green board feeling like “doing something extra.” I used it behind a vanity once and it held up fine, but after seeing what water can do, I’m not risking it in a shower. Is anyone actually waterproofing over green board, or is that just throwing money away? Cement board’s heavier and pricier, but at least you know it won’t turn to mush if there’s a leak.