Webas required by the national building code and the c. c. m. c. Residential standards canada, current editions allow at least a 100 mm (4”) overlap of the top course over a bottom. Webpreparation instructions and recommendations. Storage and handling requirements and recommendations. For each finish product. Webhere's everything you need to know about this type of siding for residential projects. The benefits of aluminum include comparable costs to vinyl, weather resistance and insulation. Aluminum is a soft metal that has been a popular choice. A high quality waterproofing.