I have a draft from above a bay window, its an upper floor bay with a flat felt roof. I have striped the lath and plaster to reveal the wood. Can I just fill this with rock wool? or do I need ventilation ?
I have looked on here but the posts I have found are for bays with tiles or ground floor with another bay above.
Thanks
I have looked on here but the posts I have found are for bays with tiles or ground floor with another bay above.
Thanks