Preparation based on new substrate installations.
Once the substrate is deemed ready for plaster then the main contractor can continue to fix the internal linings, this is so that the main contractor can minimise the chance of any damage to the external plaster cladding that may be caused from the fixing process of the internal linings.
2.22.1. Preliminary Checks
Check should be made using a straight edge to ensure the wall is flat, plumb and true. Any irregularities should be taken out by straightening using a rasp.
2.22.2. Clean Surface
If the substrate has been left exposed / uncoated for more than two weeks, dust and dirt will build up on the surface. You must remove all surface dust and other contaminants prior to application of coatings. Use a stiff broom and wet the surface to prepare the substrate.
2.22.3. Masking
Before application of Render, apply masking to all joinery, pipes, roofs and all areas likely to be marked by the Render. Use drop cloths and ground covers to keep the working areas clean.
2.22.4. Colour selection
For further information on Light Reflectance Values (LRV) refer to TradeSpec™ Document 1.6 – Light Reflectance Values
