Functions of Roof Q3

Q.
a) Explain the function of roof in the following context:-

i) Weather resistant
ii) Thermal insulation
iii) Strength and stability (10 marks)

b) Using diagram, explain the differences between the following types of pitched roof:-

i) Single Roof
ii) Double Roof
iii) Trussed or Framed Roof (15 marks)

(25 marks, 2012 Q3)