Hi there, Just after some advice? I had the damp proofing done 2 years ago. in my backroom, which meant about 1-2 feet of plaster had to come of the wall from the floor upwards. Revealing the brickwork which has been re-pointed. Now i want to cover this brickwork and make it flush with the old plaster above it. I think the base must be horsehair mix and then skimmed over the top for the old plaster. It is about 1 & 1/2" thick. What should i use? doing 2 adjoining walls. Wondering what is best to keep it insulated. Thankyou. Sie.