Construction of walls in extension

[frales]

Hi

I have been left high and dry by some cowboy builders XXXXX

For various reasons(Which I will post under DIY disasters) I told them to get lost.

I am now trying to finish the job. On the walls of the extension they are breeze block on the outside and then timber framed with a cavity between. On the inside I notice they have used wool fibre insulation with polythene then plasterboard. I notice this is on all the outer walls. Is this correct? Should it be timber then insulation then polythene and then plasterboard?

Any help greatly appreciated as I am now trying to do as much myself to keep cost down.

 

[Bespoke]

Hi Frales

Photos would be good idea don’t you think so we can see what you are explaining.

 

[ColJack]

the plastic sheet is a vapor barrier.. it needs to be taped at windows and doors, joints and ceilings, electrical boxes and so on to prevent damp from gettin into the wall..