Roof assembly follows a specific sequence:

• Gable Installation: Install gables after completing wall assembly
• Purlin Placement: Fit roof rafters (purlins) and screw in place for extra security and strength
• Board Installation: Install tongue and groove roof boards starting from the front
• Spacing: Allow 2mm between roof boards for expansion
• Alignment: Keep checking that boards run parallel and align with rafter centers
• Trimming: The last roof board will likely need trimming to fit
• Weather Protection: Apply roofing felt or shingles immediately after completing roof boards