Information
A gable roof is a complex, large-area construction that requires a professional approach to design and execution. The biggest costs are for materials such as rafters, battens, insulation, waterproofing, and roofing material. Our gable roof calculator allows you to calculate the amount of material needed, as well as determine the roof pitch and height.
Using the calculator saves time on roof design and your money. The final 2D drawing will serve as a guide during the work, and the 3D visualization will give you an idea of what the roof will look like. Before entering data into the online calculator, you need to have an understanding of the roof elements.
Rafter Parameters
To calculate the rafter system of a gable roof, you need to consider:
- roof load;
- spacing between rafters;
- type of roofing material;
- roof pitch angle.
Recommended Rafter Board Width:
- 100-150 mm for spans up to 5 m with additional supports;
- 150-200 mm for spans over 5 m, with spacing over 1 m, and if the roof pitch is low.
Important! The spacing between rafters for a gable roof is usually set at 1 m, but for roofs with a pitch over 45 degrees, the spacing can be increased to 1.4 m. For low-pitch roofs, the spacing is 0.6-0.8 m.
The rafter legs are attached to the wall plate, which runs along the perimeter of the house. For this, either a board with dimensions of 50x150 mm or a beam of 150x150 mm is used (for load distribution).
Batten Parameters
For metal tiles, a sparse batten is created with a board width of 100 mm and thickness of 30 mm. The board is nailed with a spacing that should correspond to the longitudinal axis of the metal tile module – 35 cm (supermonterrey).
For flexible shingles, the batten is done with a larger spacing since OSB or plywood will be laid on top of it in a continuous layer.
Important! When choosing materials, pay attention to moisture resistance and minimum thickness specifications.
For warm roofs, a counter-batten is made between the waterproofing and the roofing with a bar thickness of 30-50 mm.
Roofing Material Parameters
- To calculate the roofing of a gable roof, you need to know the dimensions of the roofing material and the amount of overlap.
- Metal tiles for rigid roofing are produced with a width of 118 mm (effective width 110 mm), but the length can vary. The manufacturer can cut any length to order.
- Flexible shingles for soft roofing come in different sizes, so you need to check the specific material.
- As for the choice of insulation, for our country, a minimum thickness of 100 mm is recommended, with an optimal thickness of 150-200 mm.
The calculator allows you to calculate the dimensions of the gable roof: the length and width of the roof plane for each slope, and the roof area. The required length and number of rafters and battens for the rafter system construction. The volume of timber for making rafters and battens. The number of rows of batten boards. The calculator will also calculate the gable and the height of the ridge of the gable roof.
Our online gable roof calculator will help you easily calculate the roof area and pitch, as well as determine the rafter length. It will help you accurately calculate the required amount of materials for roofing and the rafter system. Using the rafter calculator with a drawing will ensure accuracy and efficiency in roof construction.
