Roofing Terms & Definitions

Question 1

Types of Roofs:

The roof slopes in one direction. It is sometimes referred to as a lean-to. It is commonly used on additions to existing structures. It is also used extensively on contemporary homes.

Answer 1

Shed Roof

Question 2

Types of Roofs:

Is the most common roof style. Two sloping roof surfaces meet at the top of the roof. They form triangular shapes at each end of the building.

Answer 2

Gable Roof

Question 3

Types of Roofs:

This roof slopes upward to the ridge from all walls of the building. This style is used when the same overhang is desired all around the building. This roof eliminates construction of gable ends.

Answer 3

Hip Roof

Question 4

Types of Roofs:

-required on buildings that have wings. Where two roofs intersect, valleys are formed. This requires several types of rafters.

Answer 4

Intersecting Roof

Question 5

Types of Roofs:

is a variation of the gable roof. It has two slopes on each side instead of one. The lower slope is much steeper than the upper slope. It is framed somewhat like two separate gable roofs.

Answer 5

Gambrel Roof

Question 6

Types of Roofs:

variation of the hip roof. It has two slopes on each of the four sides. It is framed somewhat like two separate hip roofs.

Answer 6

Mansard Roof

Question 7

Types of Roofs:

an inverted gable roof. It resembles two shed roofs with their low ends placed against each other.

Answer 7

Butterfly Roof

Question 8

Roof Framing Terms & Definitions:

What is the span?

Answer 8

Usually the width of the building

Question 9

Roof Framing Terms & Definitions:

How is the span measured?

Answer 9

From the outside of wall plate to wall plate

Question 10

Roof Framing Terms & Definitions:

Span measurement does not include ?

Answer 10

sheathing thickness

Question 11

Roof Framing Terms & Definitions:

Define the total run

Answer 11

horizontal distance covered by a common rafter

Question 12

Roof Framing Terms & Definitions:

The total run is usually _____ the span

Answer 12

half

Question 13

Roof Framing Terms & Definitions:

What is the total rise (theoretical)?

Answer 13

vertical distance measured from the top of the wall plate to the top of the ridge minus the height above plate (the stand). Used for calculation purposes

Question 14

Roof Framing Terms & Definitions:

What is the true rise (actual)?

Answer 14

The actual height of the roof measured from the top of the wall plate to the top of the ridge board

Question 15

Roof Framing Terms & Definitions:

Unit run (imperial)

Answer 15

12 inches

Question 16

Roof Framing Terms & Definitions:

Unit run is always a ____ measurement

Answer 16

horizontal

Question 17

Roof Framing Terms & Definitions:

Unit run is _____ the unit span

Answer 17

half

Question 18

Roof Framing Terms & Definitions:

Unit span is _____ in the imperial system

Answer 18

24 inches

Question 19

Roof Framing Terms & Definitions:

Unit of rise is a ____ measurement

Answer 19

vertical

Question 20

Roof Framing Terms & Definitions:

What is the unit of rise?

Answer 20

The distance that a rafter rises for (every foot of horizontal travel) = unit run

Question 21

Roof Framing Terms & Definitions:

What is Unit Line Length or Length per foot run?

Answer 21

Diagonal or hypotenuse of unit run and unit rise, also found on the square