The Cement and Concrete Institute (C&CI) has among its extensive list of publications two leaflets which deal with plastering. Plaster problems have for many years been among the most frequent technical inquiries received by the C&CI.
Hanlie Turner, marketing manager of the C&CI, says many building contractors are not sure how to evaluate acceptable plastering, mainly as a result of years without formal standards or regulations covering plaster quality. “This makes it difficult for homeowners and other clients to force a contractor to make repairs,” she states.
In addition to the tuition in plastering provided by the C&CI’s School of Concrete Technology in its regular courses, the C&CI published two free leaflets with detailed guidelines on plastering.
Get the Successful Plastering leaflet that provides the technical information necessary to ensure that plastering is done correctly. It deals with selecting materials (including assessing the suitability of sands), calculating mix proportions and provides instructions for the preparation of the surface of various substrates before the plaster is applied.
The C&CI’s second plastering leaflet, Common defects in plaster, discusses how to assess if a plastering job is acceptable and covers the most common defects in this part of the building process. The leaflet includes advice on structural and non-structural cracking, de-bonding, a lack of hardness, grinning (when mortar joints are clearly visible through the plaster), expansion and popping. The causes and repair methods for each problem are discussed.
Free copies of these two publications can be obtained from the C&CI Information Centre in Midrand or downloaded from the C&CI website, www.cnci.org.za.
Cement and Concrete Institute (C&CI)
Tel: 011 315 0500