You need to address the damp problems before sealing it up. Inner cavity wall should be dry so either penetrating or humidity but also early cavity walls had nasty things like rat trap bonds instead of wall ties and so need to treat them more like a solid wall.
We had this very odd square patch of damp with salts precipitating around it and through the thick textured wall paper.
After stripping the wall paper i found it was a perfect square of damp gypsum - the rest of the wall is some sort of sand and cement render.
I dug it out - about 10cm of...
Yes, it was a concern but in practice the stove is awesome and makes the room very cosy.Certainly a lot better than the old open fire in which the heat was sucked out of the chimney.
I put a 20mm vermiculite back to it so that most of the heat goes into the bricks or the room and thermal mass...
Air grill as of yesterday.
Originally there was an open fire so the when cavity wall insulation brutes came they made a mess of a combustion vent - unsleved, non compliant hit and miss and installed it upside down (2009).
The stupid thing is the draft coming from the vent was...
I lime rendered our breast. Filled in the recessed mortar joints with horse haired lime then followed the spec from Mike Wye support team.
I was advised not to use any beading around the aperture - metal will expand and crack the plaster and plastic will melt. So I made a temporary frame...
often they go hand in hand so a leaky gutter above makes parts of the wall cold and high internal humidity settled on the cold areas - it doesn't have to be dripping on the wall just humid and moist.
Scarping mold is just a temporary solution.
need more details. what kind of construction...
also . if this was asbestos it's most definitely one to take precautions. Not like artex which has 0.5-2% asbestos. The old asbestos loft insulation was 100% spun asbestos fibres. Lovely stuff
not expensive to test. I got one turned around in 4 days.
It looks like glass wool insulation . it in the whole ceiling as i've seen this shite from cavity wall insulation overspilling into ceiling though holes around joists or uncapped cavity.
what age is the building? what's on the otherside...
lime mortar is thixotropic. Knocking it up sufficiently makes it more workable. Adding too much water can lead to shrinkage and feeble plaster.
Something like : Mix the mortar for 5 minutes (paddle or mixer), allow to rest for three minutes and re-mix for another three minutes.
You can add a...