If you would like to dot and dab you could use Kingspan Kooltherm board, or other makes.
take a look here
http://www.insulateonline.com/index1.htm?products.htm~main
For battens use tantalise tile batten 2 x 1 inch at 400mm centres,
you will need, a straight edge, a level, hammer drill, 6mm masonry bit, 60mm x no. 5 screws or longer if you have to pack the batten out a lot,
a string line, hammer, box/pack of 6mm raw plugs
cut two battens the length of the wall and a small off cut, lay one batten on the floor at the base of the wall 2 inch side down then stand
the 2nd batten on top 2 inch to the wall, now using your straight edge, level and hold the off cut under the straight edge as a spacer and
the bottom of the straight is against the batten at the bottom of the wall, not the one on the floor,
work your way along the wall to find its highest spot this is where you can't get a vertical because the wall is leaning out, if there is a
odd brick sticking out you can chop it back.
when you have found the high point drill through your bottom wall batten where your straight edge was resting with the 6mm masonry bit
on hammer and deep enough into the brick to take the raw plug, push your plug into the hole in the batten and tap the top of the plug
flush with the wood, turn your screw finger tight into the plug then hit the screw with your hammer driving it and the plug through the batten
and into the wall so you have about an inch of screw still showing, tighten home with screw driver just sinking the screw head,
now fix the batten at each end using the same method, remove the batten on the floor from under it now and keep it for the top,
pull your string line along the batten now screw and fix the bottom batten at every 600mm or 2 ft or as near as but only drill the brick
and add any packers needed to keep the batten out to your line, now do the end up right battens, these stand on your bottom batten and
you need to cut them 3 inches short of your ceiling, I like to fit one upright near the middle of the room then fix my top batten next over this first
as the to ends will rest on the outside uprights, fix the top like the bottom using the string line the fill the rest of the wall in.
on your next wall keep your corner up rights a half inch in away from the corner then work your 400mm centres from that.
when you plaster board work around the room from where you worked your batten centres, cut your boards at the bottoms and a half inch short,
when you stand them against your battens stand them on a spade, put your foot on the spade handle and lift the boards tight to your ceiling
then put in about 4 screws before you let your weight off the spade handle.
It seems complicated but once you're done one wall it will seem like child's play to do the rest, its like most jobs it would be easy to show you
than it is to explain it.
If I were to board as it is now and get damp coming through the walls what would happen to the plasterboards? would they start to show damp patches?
you would have damp where you have dab the boards, most likely have salts come through, your paint would peel or blister, the boards will break
down in time.
