General requirements

1114 EXECUTION
11141 General

Surfaces to receive plaster, pointing or screed shall be thoroughly cleaned, inspected and wetted before application. Concrete surfaces shall be rubbed with cement slurry and angles of concrete & masonry surfaces dusted with cement to give additional strength.

All chases shall be cut out, services installed and chases made good prior to application of plaster, pointing, and screed. Hacking on concrete and masonry surfaces shall be carried out by approved means.
Joints shall be raked out to a minimum depth of 10mm to form proper key if not specified under the respective masonry type to receive plaster or pointing finish.
Where making good plaster, pointing or screed is required, the surface shall be cut out to a rectangular shape and the edges, cut out to form dovetail key. Cracks, blisters and other defects shall be cut out and made good.
Dubbing out shall be made in the same material as plaster. Dubbing out to make up uneven surfaces of walls, floors etc., shall be made before the application of the undercoat.
Making good of plaster and dubbing out shall be finished flush with face of surrounding plaster.
Plaster & pointing applied to different materials shall be raked out to a minimum depth of 10mm at the joints finished and pointed in cement mortar. Where the joints between different materials are tied in hoop iron the plaster or pointing may be carried through the joints.
Plaster, pointing and screed containing cement shall be wetted for a minimum of seven days after the application of the coat.
Plaster work shall be applied to specified thickness and truly level and plumb.