Lime plastering

[liam546]

I own a Victorian property, 9 inch solid brick, no cavity and lime mortar.

I have had issues with damp, I've hacked off plaster to 1.2 meters and allowed walls to dry out.

I do not want to use bonding or modern gypsum plasters as these absorb to much moister and will show damp. I do not want to use sand and cement as this will block damp in wall and water will decay bricks or run elsewhere into joists.

I want to use a traditional lime to allow the walls to breathe, I spoke to a lime specialist and he gave me this advice....

Use R50 as a backing coat, push mesh into it, Allie to dry for a day. Then create a key using soft brush and then apply top lime coat, leave for another day and then do second top coat. Do this for downstairs and upstairs can just use a modern skim using modern plaster.

Unfortunately this guy is booked up for the rest of the year. Does anyone have any advice on whether this plan sounds good or if anyone else familiar with lime could have some input that would be great.

 

[loply]

Did you solve the issue with the damp?

Simply replacing the old plaster with new plaster isn't going to last long if not.

Good on you for going with the lime plaster though.

 

[liam546]

I cannot fully understand why the damp us occurring although it never reaches more than a foot, the house is on a solid chalk substrate so it should in theory drain well.

I am wanting to find the route cause of the damp or at least try to understand it so koan to call an independent damp specialist in who charges a fee and has no vested interest in offering remedial works.

I then based on the survey report consider my options, although given lime is very expensive to replace with high labour costs too I am looking also at the option of using 1x1 Batton and a moisture restistent plasterboard fixed too this. This will leave a ventilated gap which I will ventilate top ( into the roof space) and at bottom (under the wooden suspended floor).

I'm completely sick if this damp issue to be honest and just want to find the right solution [/b]