- Ensure the purlin is in a straight and flat condition - Draw a straight line before installing the roof - Purlin Distance 1.2(For Single Profile) - Purlin Distance 1.5 - 1.7 (For Twin Profile)
2. Roof Pitch
- The minimum roof pitch is 10%
3. Roof Installation
4. Installing SDS (Self Drilling Screw) and Roofseal
- Install SDS by the following picture(1 M² requires 4 SDS & 4 Roofseal
5. Overlap Length
- Overlap length between each roofing profiles (if present or neede) is 30 cm (assuming roof pitch is 10%)