Most candidates were able to state the qualities of materials used for damp-proof courses. They were also able to state the advantages of sandcrete block over brick wall construction.
However, few candidates were unable to illustrate with sketches, the location of damp-proof courses in a foundation and a concrete roof.
The expected response to question 3 is as given below:
(a)
Qualities of materials used for damp proof courses are:
- Impermeability;
- Durability;
- Resistance to chemical attack;
- Resilience.
(b) Sketches showing location of damp proof courses in:
(c)
Advantages of sandcrete block over brick wall construction are:
- it is cheaper;
- the colour could be changed to any desired one;
- it is much easier to construct;
- it is faster to construct;
- cheaper technology