Dave Plowman wrote in message ...
In article ,
Michael McNeil wrote:
Knock off the chalk, one or two walls at a time and put 2" x 2"
battens up at 600mm centres or whatever suits the wall/board/you.
Place fibreglass insulation between battens and cover with
plasterboard. Tape and paint or plaster to suit.

This sounds easy, but remember all the skirtings and architraves etc will
have to be renewed, and any ornamental plaster will be scrap.

As they will be anyway. Skirting and Archetraves are optional as they
can be reused or replaced with more stylish stuff. And you can just
use straight board if that will do you.

The heat gain will be in the order of £40+ per annum on a central
heating bill I am sure. The resale value is the real safety net for
doing a good job though.