What is covered in a roof survey 

 The roof survey should cover all the areas of the roof including:-

Main covering material, under felts, ridges, hips, valleys, box gutters, weatherings, flashings, abutments, eaves, verges, penetrations, openings and rain water goods.

The roof survey will normally not comment on the structural integrity as this is the area of a Structural Engineer. However, should a roof surveyor spot an obvious structural defect such as lack of bracing or an obvious roof sag, it will be brought to the customers attention for further assessment by others.