I did research on the thermilate additive first online, seemed like all my problems would go away with just using this item. There is a massive amount different items available and it can actually get very confussing of what you should buy.
However i did buy Thermilate powder which you have...
I started to paint the spare room to treat the condensation. To start off i removed old wall paper and filled in the holes to prepair for painting. Sanded down any excess plaster and scraped off paint to give an even finish to the room.
Due to the condensation in the property i washed the...