Insulation installed

After modifying the electrics the wall was fully insulated with mineral wool. This was dirt cheap from B&Q £10.00. I did consider using a polyurethane panel such as Kingspan but it would have needed so much cutting and trimming I was not sure that in the end it would have performed much better and would have cost a lot more.

New studs

The existing timber frame was built in Canada and was therefore made to imperial sizes. 8ft x 4ft. (2440 x 1220) current plasterboards are 2400 x 1200 so there would be a lot of waste so new studs were put in sideways at the correct spacings (1200 centres)

The existing insulation

The small amount of insulation can be seen here. it is nailed to the external ply sheathing. There is no vapor barrier and it is standard plasterboard.

Removing the Plasterboard

First we had to remove all the plasterboard. Unfortunately there is nothing to do with it but take it to the dump. Having removed it all we could see if there was any problem with the wall. It was all perfect no sign of rot condensation etc. ( I don't know what the fault is with this photo I think there must have been water on the lens)

Insulate a Timber Frame Wall

I live in a late 70s Timber Frame Bungalow. I assumed that the 100mm stud walls were filled with insulation but when I started working on the house I found that there was only about 20mm of mineral wool insulation.I have asked the local energy advice centre what to do but they were very unhelpful suggesting a very thin insulating wall paper.
We tried pumping in Cavity Wall insulation through the plasterboard but it didn't work. So after toying with blowing in polystyrene beads for a while we have decided the best way is to remove the plasterboard and insulate the wall.