Batten and tile over brick wall insulation question

[Rayyy]

Hi. I'm going to batten over a block wall in my bathroom but im torn between the ways how to deal with insulation.

Most people say to insulate but do I have to? Honestly i've heard many people also saying that insulating will trap moisture in the wall so I can't really make my mind up if i should insulate or just leave it hollow.

Im planning on battening with 2x1 and 2x4 treated timber since those are the ones i've already got. Both walls that are being battened are outside walls and they are single skin hollow block + render . Can i just batten, cement board over, waterproof and tile over and be done with it? Or should I not worry and insulate the wall as well? Heard some people advising on using "breathable" insulation but i could not find such product locally.

Thanks

 

[noseall]

outside walls and they are single skin hollow block + render .

INSULATE!

Its crying out for it. As much thickness as you dare. You also need to consider lining it with polythene too. That wall in that situation is way under-specced.

 

[Rayyy]

INSULATE!

Its crying out for it. As much thickness as you dare. You also need to consider lining it with polythene too. That wall in that situation is way under-specced.

Would you line it before battons or batten and then line over it and then put the cement board up? And is there certain products you'd recommend for insulation/lining? 1 wall I'm only able to give 50mm away where as the other wall I might get away with up to 100mm without losing too much space.

Thanks

 

[^woody^]

heard many people also saying that insulating will trap moisture in the wall

Easy. Stop listening to them.

 

[Mrs Ten Names]

Cold bathroom walls are especially prone to condensation, thus potentially mould.