We make sure that the mortar joints across the wall are not too deep; the walls must be clean, dust free and dampened down, and any larger holes must be filled with pinning stones. Then the wall can be rough pointed ready for the first scratch coat.
The walls are left for two to three weeks between coats to allow carbonation to take place; during this period the walls are dampened down to retain moisture. The same process applies to outside and inside work but on the outside we use hessian sheeting to keep the wind and sun off. The sheeting helps retain moisture during the dampening down period, which creates a damp atmosphere so that the lime does not dry too fast, which then allows for the carbonation to take place.
Lath and plaster on ceiling and walls Jason likes to use Hemp for base coats then a fine Lime finish for the top coat