Plaster and Skimcoat
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Types and Durability
|
Types
|
Expected Lifespan (Years) |
Adjustment Factors
|
| Cement based plaster with cement in accordance to SS 26 for normal Portland cement, BS 146 for Portland Blastfurnace, BS 915 for high alumina cement and BS 5224 for mansory cement; with method of application complies with CP 56: 1991. |
35+
|
Constantly contact/ immersed in water or exposed to extreme moisture: -15% years High possibility exposed to reactive chemical: -15% years Test certificate from approved local testing authority: +15% years
|
| Cement based plaster with cement not in accordance to SS 26 for normal Portland cement, BS 146 for Portland Blastfurnace, BS 915 for high alumina cement and BS 5224 for mansory cement; with method of application not complies with CP 56: 1991 |
< 35
|
None
|
| Premixed cement based plaster mix proportion according to CP56: 1991; with method of in accordance to manufacturer instruction |
30
|
Constantly contact/ immersed in water or exposed to extreme moisture: -15% years
High possibility exposed to reactive chemical: -15% years Test certificate from approved local testing authority: +15% years |
| Premixed cement based lightweight plaster with mix proportion not in accordance to CP 56: 1991 |
< 10
|
None
|
| Premixed cement based plaster applied over stainless steel or glass/ polymer reinforcement mesh or lathing. |
10
|
Constantly contact/ immersed in water or exposed to extreme moisture: -15% years High possibility exposed to reactive chemical: -15% years Test certificate from approved local testing authority: +15% years |
| Premixed gypsum based plaster with types according to CP56: 1991 or BS 1191 Part 1 and 2. |
30
|
|
| Premixed gypsum based plaster with types not according to CP56: 1991 or BS 1191 Part 1 and 2. |
< 10
|
None
|
In the case of 2 or more condition of adjuztment factor occur, the percentage of year shall be added to obtain the durability value. Refer to durability calculator.