thermal property of walls means cold damp walls

[simon2spanners]

Hi,

I live in an end terrace, 1920 single skin concrete block house. The ground floor is concrete base too.
The main bedroom has three exterior walls and we have serious condensation problems so I am looking to overboard these walls. Anyone got any tips, I have found a great company which gives full specifications but mentions that the back boxes I will need for the electrics will need to be extra depth. Can I just remount the existing boxes to the new finished face?


I have read the U values (thermal conductivity rates) are not good for concrete walls but cannot find any true values on a easy to use table as I have been verifying my heating requirements before getting a wood burner and back boiler. This site has been good for this and my results look about right considering the kw values I am getting correspond with the rads and it is all ok when the heating is on. When the heating is off it quickly soaks into the walls and the temp drops. I intend to over board throught my house. If anyone has some thoughts on going this way about things it would be much appreciated.

This one is a bit of a cross topic but really I need advice on the overbaording which seems to be best place in ere

 

[PrenticeBoyofDerry]

This could help
http://www.insulation.kingspan.com/uk/pdf/tw55.pdf

as far as backboxes, your standard backbox is 25mm deep but do increase in size 35mm and 47mm.
If you would like to keep your current backboxes and the wall exceeds that of the box, you may need longer plate screws;
http://www.tlc-direct.co.uk/Main_Index/Boxes_and_Enclosures_Index/Plate_Screws_1/index.html
Just don't over tighten if no support behind the board or could damage/break the board.

 

[simon2spanners]

Nice one, will opt for the screws, thanks