O
Old Mod
Generally speaking, unusual conditions notwithstanding, u would just prime plaster, and as long as its fully dried, prime as per instructions of your chosen adhesive.
Even if the tiles exceed 20KgM2 unless the plaster is in a bad state of repair, you still wouldn't need to remove the plaster.
U can overboard directly over it.
U would still prime first, then stick the Hardie to it with adhesive plus you would have the addition of mechanical fixing,which is standard practise anyway.
The adhesive is not used primarily to adhere the Hardie,the mechanical fixings are there for that!
The adhesive is used to take up any unevenness in the substrate.
Why would u suggest ready mixed anyway?
I don't actually remember the last time I took a lid off a bucket of adhesive, truly I don't!
Even if the tiles exceed 20KgM2 unless the plaster is in a bad state of repair, you still wouldn't need to remove the plaster.
U can overboard directly over it.
U would still prime first, then stick the Hardie to it with adhesive plus you would have the addition of mechanical fixing,which is standard practise anyway.
The adhesive is not used primarily to adhere the Hardie,the mechanical fixings are there for that!
The adhesive is used to take up any unevenness in the substrate.
Why would u suggest ready mixed anyway?
I don't actually remember the last time I took a lid off a bucket of adhesive, truly I don't!