No pitch required
(how )

* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.

3D

L1

L2

l1

C1

C2

H

* L is the length of the roof

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

BH = EH =
...

AG = FG =
...

CI = DI =
...

AB =
...

BC =
...

AF = CD =
...

DE =
...

EF =
...

GH =
...

HI =
...

ABHG =
...

BCIH =
...

DEHI =
...

EFGH =
...

AGH =
...

CDI =
...

ABIHF = BCIH = DEHI = EFGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGF

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.

3D

L1

L2

l1

C1

C2

H

Small dormer:

Lu 0

Lu 1

h

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

BH = EH =
...

AG = FG =
...

CI = DI =
...

AB =
...

BC =
...

AF = CD =
...

DE =
...

EF =
...

GH =
...

HI =
...

ABHG =
...

BCIH =
...

DEHI =
...

EFGH =
...

AGH =
...

CDI =
...

ABIHF = BCIH = DEHI = EFGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGF

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

* This image is to clarify which is the rise of the roof (H) and the rise of the dormer (h). The image is for general informational purpose.

3D

L1

L2

l1

C1

C2

H

Large dormer:

Lu 0

Lu 1

Lu 2

h

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

BH = EH =
...

AG = FG =
...

CI = DI =
...

AB =
...

BC =
...

AF = CD =
...

DE =
...

EF =
...

GH =
...

HI =
...

ABHG =
...

BCIH =
...

DEHI =
...

EFGH =
...

AGH =
...

CDI =
...

ABIHF = BCIH = DEHI = EFGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGF

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

3D

L1

L2

l1

C1

C2

H

Small dormer:

Lu 0

Lu 1

h

Small dormer 2:

Lu 3

Lu 4

h 2

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

BH = EH =
...

AG = FG =
...

CI = DI =
...

AB =
...

BC =
...

AF = CD =
...

DE =
...

EF =
...

GH =
...

HI =
...

ABHG =
...

BCIH =
...

DEHI =
...

EFGH =
...

AGH =
...

CDI =
...

ABIHF = BCIH = DEHI = EFGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGF

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

3D

L1

L2

l1

C1

C2

H

Large dormer:

Lu 0

Lu 1

Lu 2

h

Large dormer 2:

Lu 4

Lu 5

Lu 6

h 2

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

BH = EH =
...

AG = FG =
...

CI = DI =
...

AB =
...

BC =
...

AF = CD =
...

DE =
...

EF =
...

GH =
...

HI =
...

ABHG =
...

BCIH =
...

DEHI =
...

EFGH =
...

AGH =
...

CDI =
...

ABIHF = BCIH = DEHI = EFGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGF

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

3D

L1

L2

l1

C1

C2

H

Large dormer:

Lu 0

Lu 1

Lu 2

h

Small dormer:

Lu 4

Lu 5

h 2

* l is the width of the roof

* H is the rise (height) of the roof (3D image)

* C is the ridge length of the roof

* For decimal dimensions, use the dot notation! (.)

BH = EH =
...

AG = FG =
...

CI = DI =
...

AB =
...

BC =
...

AF = CD =
...

DE =
...

EF =
...

GH =
...

HI =
...

ABHG =
...

BCIH =
...

DEHI =
...

EFGH =
...

AGH =
...

CDI =
...

ABIHF = BCIH = DEHI = EFGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGF

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

AGH

- Slope Grade = ... %
- Angle = ... deg
- Pitch = ... x12

All calculations are free to use and we decline any responsibility on the end result

The informations provided by our website are generic and they should not be used for purchasing construction materials - for that please consult a specialist.

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