One side is rough, the other is smooth, with the brand name, batch No. printed on.
I've put up stud to enclose a new bath on 3 sides, time to put the Knauf boards on.
The obvs is that the rough face will grip the cls better.
So which face takes the tiles?
I shall make this clear with a diagram.
I wish to build a side extension within PD. How big can I build a side two storey side extension onto the old single storey house?
Originally people lived in loft, there still is a gable first floor window.
House is pitched roof and extension would follow...