Drylining window reveal

TiNcAn

Wartburg wrote: »

I simulated various options with your proposed wood fibre insulation but they all ended with more or less the same condensate , as I stated before. You need to have a VCL, otherwise your wood fibre board will be drown.
You might should use a hygrometer, to check and trace your existing relative humidity. I´d say the 45% rel. humidity, as builditright suggested for an ideal case, are hard to reach with your existing structure.
It´s probably safer to stay with the limecoat for rendering to the bricks. In the worst case, the bricks may not harmonize with the suggested cement and you open another battlefield.

This helps to emphasis the point that the VCL is really an integral part of the this insulation system.
Well fortunately there should be no cement remaining on the bricks and will serve as a fairly clean substrate for the lime base coat to take. I looked into usiing some lime-cement mix but this would negatively impact its vapour permeability.
Considering that this is such a finely balanced insulation system, would you have any other suggestions that would be better suited? 
I will also take your suggestion and bring a hygrometer to the house next week to monitor the mositure levels. I have added a couple of pictures for your interest to show the state of the wall initially while I was removing the lime-cement plaster. A lot of this can be attributed to driving rain as the gutter was overflowing, but was also down to the impermeable paint, pebbele dash on the outside, cement render at lower section inside. The situation has greatly improved since I addressed most of these points and the bricks are nice and dry now. I will have to upload another picture at some stage. 

Wartburg

You´re investing a lot of work, time and money into your house. Thumbs up!
If you get a chance, I highly recommend to check the area where the joist ends go into the wall. Fingers crossed that you have no issues with dampness there.
I can´t see any alternative to the wood fibre board, you want to use. I just came across with an important remark of the scientist, who developed the simulation I use. He stated that the amount of condensation will be less in reality, because of the extensive spread of the condensation, once you have the wood fibre board fixed tight to the existing wall. This fact causes changes in the diffusion behaviour of the structure, which isn´t considered in the simulation so far.