Putting aside the question of whether one type of lining is ‘more moisture resistant’ than the other, there are strong arguments and practical considerations for choosing wet area plasterboard.
Firstly, it comes in similar sheet sizes and thicknesses to other wallboards (10 or 13mm). This means the lining of wet areas will be similar in appearance to the rest of the building. Left-over wet area board can also be used to finish or patch other rooms, and you can use the same jointing compound.
In fact, some builders are specifying that the same multi attribute linings are used in all areas of multi-tenancy developments such as hotel rooms and small apartments. The slightly higher cost of purchasing the multi attribute plasterboard is more than recouped by the convenience of only having to specify, order and take delivery of a single product, then getting the sheets up to different levels. It also eliminates the risk of rework when a plasterer installs the wrong board in the wrong place.
A second advantage of wet area plasterboard is that, with its paper surface, it paints up and presents as well as other types of plasterboard. This is especially important in rooms where tiling does not reach up to the ceiling (such as the painted wall area above 1200mm-high wall tiles) or down to the floor, as under a pedestal handbasin. Fibrous cement sheet, on the other hand, is sanded with rotating drums during the manufacturing process – leaving gouges which can be highly visible through paint, especially in areas of glancing light.
A third advantage of wet area plasterboard is that it’s as easy to score, snap and install using the same screw type as other kinds of plasterboard. Fibrous cement sheeting is not as easy to cut and is either nailed or installed using specialised screws.
TIME IS MONEY
When a product used for wet areas is similar to the products used elsewhere in the project in terms of thickness, appearance, ease of installation and reliability, it stands to reason that it makes a better choice to use it rather than ‘carve out’ small areas and apply a technically different lining product.
The biggest technical advantages of wet area plasterboard over traditional fibrous cement sheeting are in its handling, working and installation. Less effort involved, less risk of injury and so very much faster to use. In most projects that can add up to a considerable saving in costs, time and angst.
Learn more about the USG Boral water-resistant plasterboard range or hear from a builder who recently switched to using water-resistant plasterboard at USGBoral.com/nz/wr-plasterboard.