Be aware you CANNOT get a flat finish with this paint. It's also pretty much impossible to cut in accurately. Definatey use medium pile roller but a wide brush is helpful to spead it out on the cut in first and the mini roller after to get a uniform texture. Work quickly and in small sections. Not very user friendly but your client will be happy because the room will feel warmer and dryer. This paint is not easy to use, don't imagine it's going to behave anything like normal paint. However the end result is that the overall feel of the room is much better.
Brilliant. Does what it says. Very pleased with this product. Thank you.