insulation thickness over timber stud work

[bluebaron]

Hi All,

I am planning on putting insulation over my timber studs (already insulated) to prevent ghosting. (don't really want to stretch to the plasterboard/insulation laminate boards)

How thick do you think is necessary? Not worries about U values as I have already far exceeded minimum within the stud work.

Was planning 12mm plus 12.5mm plasterboard but was worried this is insufficient?

Thanks

 

[tomfe]

Might be cheaper to call in the ghost busters and then just board out.

 

[bluebaron]

hmmm,

12mm chipboard same price as 12mm insulation, ply about £2 more a sheet.

 

[^woody^]

2mm polystryene wall liner roll will do if this is the internal frame to a cavity wall

 

[bluebaron]

It the internal wall (of external wall)of a timber frame house. 50mm cavity then block. Studs have 120mm insulation