Tend to agree here, have had a couple of jobs over past couple of months where regardless of plasterboard or hardibacker being the surface, the water ingress had rotted a) the studs in the wall and b) a supporting floor beam, nasty. So perhaps tanking wet areas regardless of the substrate is best practice.
Tanking with a membrane or marmox is waterproof as is wedi board, aslong as you finish any joints correctly.
They are also lighter than haribacker/aquapanel, easier to cut, have some thermal and acoustic properties come in a variety of sizes and I love em.:smilewinkgrin:
Tend to agree here, have had a couple of jobs over past couple of months where regardless of plasterboard or hardibacker being the surface, the water ingress had rotted a) the studs in the wall and b) a supporting floor beam, nasty. So perhaps tanking wet areas regardless of the substrate is best practice.
Obobsmith, looking back through this thread there are a couple of posters who thought that Hardiebacker is impervious to water and doesn't require a membrane. I'm not surprised you have encountered rotten studs behind Hardiebacker if people have been installing the boards without a membrane because they have relied on the advice of their builders merchant rather than reading the instructions. The instructions don't require tanking to be applied, so why go to the trouble and expense? I don't like the idea of using plasterboard in wet areas, but I suppose it would be OK with tanking. Too many people seem to think that water resistant plasterboard is waterproof and use it without any further protection against water damage to the board and the studs behind.
