The roof with one side is the easiest shape for the use of slate. Usually the upper row of the roof cover is made of special ridge tiles.
Different types of roofs which can be covered with slate
Slate is a natural product which is manufactured manually in different shapes and thicknesses for multiple uses:roofs (new or to be renovated), floors, decoration etc. The following pages will help architects as well as private individuals to find the slate which suits their projects best.
The roof with two sloping ends and two long sloping sides is covered with tiles on four sides.
This type of roof combines the characteristics of the gable roof and those of the hip roof. The gables are quite open, but well protected from bad weather.
The lines of intersection between two contiguous sloping sides join at the top of the roof. The base surface is a square, a rectangle or a polygon. The pyramid roofs or turrets can be pavilion roofs with very steep sloping sides.
The roof with two sloping sides is the roof shape which is used most frequently. In the bottom part of a roof with two sloping sides, it is a good solution to adopt a change of incline (“coyau”).
How to calculate the number of slate titles per square metre.
UNCOVERED PART OF THE TILE x (width of the tile + width or thickness of the hook) = total surface of the “pureau”
1 m² : surface of the “pureau” = number of tiles per m²
Example for a slate tile of 400 x 200 mm, with a covered part of 85 mm:
- 400 - 85 = 315
- 315 : 2 = 157,50
- 157,50 x (200 + 3mm) = 31.972 ,50 mm²
- 1.000.000 mm² : 31.972,50 mm² = 31.28 tiles per m²
How to determinate the zone of covering and the slope of the roof
|Slopein %||Zone 1||Zone 2||Zone 3||Slopein degrees|
|Horizontal projection of the pitch (in m)||Horizontal projection of the pitch (in m)||Horizontal projection of the pitch (in m)|
|from 1to 5,50||from 5,50 to 11||from 11 to 16,50||from 1 to 5,50||from 5,50 to 11||from 11 to 16,50||from 0 to 5,50||from 5,50 to 11||from 11 to 16,50|
* This information is just given as an indication. It is not contractual and has been calculated after a request for classical slate.
The “horizontal projection of the pitch” is calculated as follows:
You can also calculate the weight of the slate per square metre, considering that the mass of good slate is 2.81 gr/cm3.
Example for a slate tile of 400 x 200 mm - thickness 5 mm - 31.28 tiles per m² :
- Mass = 2.81 gr/cm3
- 400 x 200 x 5 x 2,81 x 31,28 : 1.000.000 = 1.000.000 mm² : 31.972,50 mm² = 35,16 kg/m².