[recall]

I can't use stands for these traps as the ceiling is sloped and putting them on stands would actually cut of a large proportion of the space in the room.

I thought foam would be much cleaner, since I've seen them use it in Sound On Sound readers stories in rented accomodation where they cannot damage the walls. I guess it could be a sales driven article (hence the copious amounts of Auralex)

I am concerned that driving nails/hooks into plasterboard will crack the plaster. As it is not a solid wall I am also concerned about how I would go about mounting panels which are heavier than a normal picture frame.

Just to be clear on the type of wall I'm talking about, the attic was previously only used for storage and then converted into a spare room. I guess the builders must have used some kind of plaster board as the sloping ceiling/wall. Either way knocking the ceiling with my knuckle yields a failry hollow sound. What's the deal with mounting on this kind of surface?

I would like to go with fibreglass of course but I need to make sure I can "make good" with the surface if I ever move out of the room (IE fill the holes in/blend the colour etc)

Cheers,
Iwan