Calculation of roofing materials for pitched roofs

drawing scale 1:

Specify dimensions in millimetres


Specify the dimensions of the roof

Height Y
Width X
Overhang C
Length B

Roof Materials

The width of the rafters S1
The thickness of the rafter S2
The distance between the rafters S3
The distance to the edge of the roof S4

The width of boards lathing O1
The thickness of the boards lathing O2
Between boards crates R

Height roofing sheet L1
Width of the roofing sheet L2
Overlay sheet (%) L3

Google Play

Calculation of the gable roof

Enter the required dimensions in millimeters

X - house width
Y - the height of the roof
C - the size of the eaves
B - The length of the roof
Y2 - additional height
X2 - the extra width


The program is designed to calculate roofing materials: amount of sheet material (Onduline, Nulin, slate or metal), underlay material (asphalt, roofing), number of boards lathing and rafters.
You can also calculate some useful dimensions of the roof.

The program operates in two modes: a simple gable roof and a roof with two side gables (side roofs), Type 1 and Type 2.

Attention! If you have a roof with one gable side, then use to calculate the first type 1, then type 2. And already from the received data, calculates the number of building materials: trusses, sheathing boards, underlay and sheet materials.
Otherwise, the calculation may be an error. After all, the program allows for cuts in the main roof under the roof side gables.

In the calculation, you'll see a few numbers: the size or the amount of construction material half the roof and in brackets - full size or volume.
In calculating the extra roof - a full size and scope, and in brackets are two numbers: the size and scope of one or two more roofs.

Attention! In the calculation sheet of roofing material, keep in mind that the program finds in the area of the roof.
For example, the 2.8 series, multiply by 7.7 sheets in a row. In a real construction put 3 rows.
To more accurately calculate the number of sheets of roofing to reduce the height of the sheet in the calculation to obtain a number of series.
Do not forget to set the exact magnitude of overlap.

When calculating the volume of material the main roof rafters, under the regime of type 2, the program does not include cut-out side gable. This is due to some difficulties in implementing the program.
Maybe I'll decide in the future.
However, the excess material rafters are unlikely to disappear or to make some adjustments in their calculations.
Will also be a separate program for more intelligent calculation sheet of roofing materials.

And do not forget to buy construction materials should be with some margin for waste.

Google Play
calculators Your calculations Entrance
You have no saved calculations.
Register or log in, that would be able to retain their calculations and send them by mail.
zhitov Author of the project: Dmitry Zhitov        © 2007 - 2022
Facebook Vkontakte