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The oldest method, known as the a massello technique, involves cutting the wall and removing a considerable part of it together with both layers of plaster and the fresco painting itself. The stacco technique, on the other hand, involves removing only the preparatory layer of plaster, called the arriccio together with the painted surface.
Cracked walls: Cracks may be horizontal, vertical, diagonal or stair-stepped. Severe pressure or structural damage is evident by widening cracks. Buckling walls: Usually caused by hydrostatic pressure. Walls appear to be bowed inward. Peeling paint: Water seeping through walls may lead to bubbling or peeling paint along basement walls. [4]
Where plaster has become severely damaged by ground salts there is little argument about the need to replaster. However, there is considerable debate about: The extent of replastering required; The use of hard sand:cement renders to replaster as part of a rising damp treatment; Plaster removed from a wall as part of a rising damp treatment.
"The floors are up, the plaster's coming off the walls, all of our equipment is gone. The whole kitchen is being ripped out because it's being contaminated by flood water, so there's a lot to do."
Class of water damage is determined by the probable rate of evaporation based on the type of materials affected, or wet, in the room or space that was flooded. Determining the class of water damage is an important first step, and will determine the amount and type of equipment utilized to dry-down the structure. [7] Class 1 - Slow Rate of ...
In old buildings with walls that shift over time, cracks can be found which allow rain water into the structure. The lime mortar allows this moisture to escape through evaporation and keeps the wall dry. Re−pointing or rendering an old wall with cement mortar stops the evaporation and can cause problems associated with moisture behind the cement.
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