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:

1. Impermeability;
2. Durability;
3. Resistance to chemical attack;
4. Resilience.

(b) Sketches showing location of damp proof courses in:
(c) Advantages of sandcrete block over brick wall construction are:

1. it is cheaper;
2. the colour could be changed to any desired one;
3. it is much easier to construct;
4. it is faster to construct;
5. cheaper technology