Observation

The candidates that answered this question answered out of context. The performance of the candidates that attempted the question performed fairly. Nevertheless, candidates were expected to answer the question this way:   
           

1. • Staining;
   • rust spotting;
   • mould growth;
   • creasing;
   • poor matching;
   • joints gapping;
   • peeling;
   • blistering;
   • discolouration;
   • edge springing.
2. 1. • Staining
      • Alkaline surface;
      • condensation;
      • cold damp room;
      • non- porous surface;
      • unsealed steel pins;
      • unsealed water soluble stains.
   2. • Rust spotting
      • Unsealed steel pins.
   3. • Mould growth
      • Damp walls;
      
      
      • Condensation;
      
      
      • Incorrect paste;
      
      
      • Stale paste.
      
      
   4. Creasing
      • Uneven surface;
      
      
      • Careless handling;
      
      
      • Excessive brushing;
      
      
      • Insufficient smoothing.
      
      

   5. 
      
      • Excessive porosity;
      
      
      • uneven surface;
      
      
      • hot paste;
      
      
      • insufficient soaking;
      
      
      • missing in pasting;
      
      
      • thin paste;
      
      
      • excessive paste.
      
      

   6. Joint gapping

      
      
      • Uneven surface;
      
      
      • Stale paste;
      
      
      • Insufficient smoothing.
      
      
   7. Peeling
      
      • Efflorescence;
      
      
      • excessive porosity;
      
      
      • poor adhering lining paper;
      
      
      • damp walls.
      
      
   8. Blistering
      
      • Cold damp room/damp surface/damp wall;
      
      
      • non – porous surface;
      
      
      • poor adhering lining paper;
      
      
      • insufficient soaking;
      
      
      • over soaking;
      
      
      • condensation;
      
      
      • incorrect paste;
      
      
      • misses in pasting.
      
      
   9. Discolouration
      
      • Alkaline surface;
      
      
      • exposure to excessive sunlight;
      
      
      • incorrect paste;
      
      
      • careless pasting.
      
      
   10. Edge springing
       
       • Excessive porosity;
       • Excessive sunlight;
       • Incorrect paste;
       • Insufficient soaking.