![]() ![]() Comply with ASTM C1658, Standard Specification for Glass Mat Gypsum Panels, for 1/2 in.Quick score-and-snap, no sawing or special tools required.Suitable for use in pre dry-in (fast track or pre-rock) and similar applications of panels before the building envelope is fully enclosed Feature a noncombustible, moisture-resistant gypsum core encased in a fiberglass face and back that shed water.(12.7 mm) Regular glass-mat panels with moisture and mold resistance This means that there's at least some path out for moisture that gets behind the enclosure, as the last thing you want to create is a moisture trap, where water vapor can't get out by hook or by crook. These probably should not be run up to an exterior wall to begin with, but if you must have them on an exterior wall, you'll want to terminate them short of the ceiling (normal) and make sure that water vapor laden air can escape the wall cavity to the inside, below and behind the shower enclosure, as well. That said, many shower systems do have some vapor/air barrier behavior to them, particularly higher quality setups that use fluid applied (RedGard) or continuous sealed membrane (Noble CPE) waterproofing. Any vapor barrier properties it will have are treated as incidental and not warranted, unless you're designing a steam shower setup, where a vapor barrier is actually needed. This specific paperless drywall joint tape is designed for professional renovators. ![]() In the context of shower systems, generally speaking what's fitted is a waterproofing system, designed to divert bulk water back into the shower drain, where it belongs. FibaFuse is a groundbreaking new creaseless paperless drywall joint tape. This makes it a much more water resistant material than regular drywall, but it's also much heavier, and much less vapor permeable. It maintains the vapor open properties of regular drywall, as well as most of its other good traits, while being much more moisture resistant, as there's no paper there for mold to snack on.Ĭement board, on the other hand, consists of cementitious (pozzolanic) materials, a fibrous or flake binder, and miscellaneous additives that add water resistance and structural strength, all baked together into sheets. We offer a comprehensive selection of these products including the trusted Sheetrock and Fiberock brands that are ideal for interior applications. In order to provide a noncombustible, lightweight exterior sheathing product to go with steel studs, drywall manufacturers started sandwiching a treated drywall core between two layers of fiberglass, which is the "paperless drywall" (more correctly called glass faced gypsum sheathing) that I was referring to in the linked post. Drywall Drywall Panels Abuse-Resistant Panels Abuse-Resistant Drywall Panels Builders, architects, and project managers can count on USG Corporation for abuse-resistant gypsum panels. This provides an inexpensive and easily producible product with predictable properties, but has the downside that the results, while vapor open (letting water vapor through), are water sensitive. Normal drywall (sheetrock, plasterboard) consists of a gypsum-and-fiber core that is pressed between sheets of heavy (construction) paper and then dried together. To understand paperless drywall, you need to understand paper drywall Additionally, I would think that a water proof membrane for the shower surround would also render it vapor proof, but I've been wrong before. It has been my understanding that cement board (with a waterproofing membrane of some sort) was the appropriate backer for a tile surround, and this now has me questioning that assumption. Would the fact that one of the surround walls in the question that answer was provided on was on an exterior wall make any difference in the application of this advice? What are the differences between a "paperless drywall" and regular drywall (I've never seen "paperless drywall" at my local big box store, so would have to expand my life experiences if I were to go looking for it) and cement board in terms of their use as a backer behind a tiled tub/shower surround? I would recommend paperless drywall over cement board for the tub surround, as well - gypsum board of all types is vapor open (around 50 perms) while serving as an air barrier, allowing drying to the inside without letting a ton of humid air into the wall cavity, while cement board is a fairly severe vapor retarder at 4-8 perms, which puts more pressure on the ability of your tub surround to keep water out of the wall to begin with. ![]()
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