Roofing end-of-unit MCQs

Front

What should the pitch be on a hipped end roof?

Back

The same as the main roof pitch

Front

What is the name given to the type of roof where a purlin is used as a mid-support for the rafters?

Back

Double roof

Front

What is required in addition to the run to calculate the length of a common rafter?

Back

Rise

Front

What needs to be measured to establish the span for a roof?

Back

Distance between the inside faces of the wall plates

Front

What method is used to determine rafter length?

Back

Calculate using the Pythagorean relationship of rise and run

Front

What component supports the common rafters at mid-length?

Back

Purlin

Front

Which component provides intermediate support to a purlin?

Back

Struts/props

Front

Why is a gap required when trimming around a roof light?

Back

To allow clearance for flashing and thermal movement

Front

Where would you find the doubling up of common rafters?

Back

Around openings such as roof lights

Front

What is required, in addition to the studs, vapor barrier and breather membrane, when constructing the stud work for a dormer window cheek?

Back

External sheathing board (e.g., plywood/OSB)