Damp farmhouse wall to be insulated

[robin banks]

Right have to do up sitting room after a leak in the bathroom above. Room last done up 30 yrs ago. Was always damp before he drylined it. Then was fairly snug and dry. Always had an open fire going in winter.
The way it was done before was the wall which is old stone with no doc or anything had a scratch coat applied to even the walls. Then they put a sheet of blue plastic dpc on wall then nailed plastic 2"x1" battens then normal plasterboard.
I've taken all down to the scratch coat. The walls are mostly dry but some are damp. I taught they would be covered in mould but are fine.
Now I would like to just bang up some insulated plasterboard but am a little concerned I would create a breeding ground for mould. Any advice that won't cost too much am fairly handy so it's all diy and the budget is non existent

 

[phillipe]

you are better off putting battens on wall with 1 inch celtex/kingspan in between foam up any gaps, with battens you have somewhere to fix skirting to, and hang stuff from

 

[Still Farming]

Dryline

 

[phillipe]

do not dot and dab as the dabs will pull the cold and damp thru

 

[Grass And Grain]

Need a vapour barrier to stop warm moist air condensing on cold wall.

Two Coates of gyproc drywall sealer onto the plasterboard skimming will do it.

 

[Still Farming]

4 inch stud work best with building paper behind and 100 mm foilbacked insulation with plasterboard to front.

 

[Dry Rot]

http://www.energysavingtrust.org.uk/home-insulation/solid-wall

https://content.historicengland.org...sulating-solid-walls/heag081-solid-walls.pdf/

 

[phillipe]

4 inch stud work best with building paper behind and 100 mm foilbacked insulation with plasterboard to front.

This is correct but you lose quite a lot of room ,there are products that are very thin and do same job

 

[landslave the 2nd]

Is " leak in the bathroom " not an insurance job ?

Had main feed into the house " leak " just before the inside stopcock not 13 days ago,
Am claiming through insurance, first thing they did was send man with probe thermometer and dehumidifier ,still ongoing but on number 9 drum ( 25 lts ) of water removed

 

[robin banks]

Probably should have claimed but didn't as was going to do up room anyway and have had a few claims recently.
Saw this stuff http://newtonwaterproofing.co.uk/store/
Looks good if a little expensive. Then put a 25mm insulated plasterboard on to it.
Only worry is locking moisture in wall might do more damage.

 

[renewablejohn]

Probably should have claimed but didn't as was going to do up room anyway and have had a few claims recently.
Saw this stuff http://newtonwaterproofing.co.uk/store/
Looks good if a little expensive. Then put a 25mm insulated plasterboard on to it.
Only worry is locking moisture in wall might do more damage.

Recipe for disaster. Your first task should be to ask yourself why the wall is damp in the first place.

 

[SilliamWhale]

Yes why is it damp before? Is it condensation or something external?

 

[Still Farming]

Silly thing is insurance companies will or do cover humidifiers and monitor and cover /repair all inside but the ones I seen will not do or cover outside work where the cause came from in the beginning ?

 

[SilliamWhale]

Silly thing is insurance companies will or do cover humidifiers and monitor and cover /repair all inside but the ones I seen will not do or cover outside work where the cause came from in the beginning ?

Well no because its a forseeable event

 

[renewablejohn]

Just to give you an example on our listed house the following all created damp and we had to come up with solutions.

External ground higher than internal
External wall pointed with cement
External guttering pouring water down wall
External window mortar seal broken
Internal wall painted with gloss paint
Internal wall plastered with modern cement plaster
Internal wall plastered to floor

 

[joe soapy]

Seen a long term test of polystyrene sheeting coated with some magic coating,
been up 5 years now outside with no sign of deteriorating, would be good for outside insulation
and weather protection

 

[simon11]

Bear in mind that lots of damp problems are actually down to moist internal air (every breath contains water) hitting a cold surface and condensing. Don't necessarily assume your previous damp was coming from outside

 

[renewablejohn]

Bear in mind that lots of damp problems are actually down to moist internal air (every breath contains water) hitting a cold surface and condensing. Don't necessarily assume your previous damp was coming from outside

That was the biggest concern of our listed building officer as our plans was to transform the draughty old farmhouse into an airtight farmhouse. The agreed solution was MVHR units in all kitchens and wet rooms but that created a problem being listed as it would involve new holes in the envelope of the listed building which was not allowed. The compromise solution was for the holes to be cut behind spoutings and downpipes and the plastic covers replaced with sandstone drilled with ventilation holes.

 

[Scaffolder]

why don't you treat the wall out side as long as its not rising damp you can water proof the out said of the property, easily done
Please private massage me some photos and your location so I can google maps you as I'm from Cornwall were this is a problem on most granite house. I do lots of this type of treatment locally
Kind regards
Nigel

 

[Clive]

you are better off putting battens on wall with 1 inch celtex/kingspan in between foam up any gaps, with battens you have somewhere to fix skirting to, and hang stuff from

I'm doing up our old farmhouse now and this is what we have done