Most candidates who attempted this question were able to:
state the functions of an external wall;
sketch the section through a timber flat roof with parapet wall.
However, they were unable to label the timber flat roof with parapet wall correctly.
The expected response to question 2 is as given below:
- Functions of an external wall:
- Supports dead and imposed loads.
- Resists damp penetration.
- Provides adequate thermal insulation.
- Provides sufficient sound insulation.
- Offers adequate resistance to fire.
- Accommodates windows and doors.
- Provides privacy.
- Prevents an unwanted guest.
