As a commercial energy assessor you will have to calculate the height of a roof where there is no horizontal ceiling, and, occasionally the slope length of the roof. You will have a combination of dimensions to work with and we have included some of these in the examples below:

 

To determine the slope length of the roof using the width and height of the roof:

( Using some example dimensions )
You can, of course, use the on-line calculator

Width of roof

Height of roof

Half of the width

Calculation A

Slope Length

A

B

C ( A / 2 )

D ( Cē + Bē )

√D

6.568

1.130

3.284

12.689

3.473 metres


To determine the slope length of the roof using the width and pitch of the roof:
( Using some example dimensions )
You can, of course, use the on-line calculator

Width of roof

Pitch of roof

Half of the width

Calculation A

Slope Length

A

B

C ( A / 2 )

D ( Cos. 19° )

C / D

6.568

19 degrees

3.284

0.946

3.473 metres


To determine the pitch of the roof using the width and height of the roof:
( Using some example dimensions )
You can, of course, use the on-line calculator

Width of roof

height of roof

Half of the width

Calculation A

Pitch of roof

A

B

C ( A / 2 )

D ( B / C )

E ( Tan-1D )

6.568

1.130

3.284

0.344

19 degrees