The average duration of the actual site work for a project is as follows:  Asphalt roofing: 1-2 days Standing seam or designer steel roofing: 2-4 days  Vinyl siding or steel siding: 4-8 days  LP Smartside or Hardie: 6-10 days Windows: 4-8 days Gutters: 1 day Keep in mind; leading up to the start of site work, many processes or variables can cause delays, especially when insurance companies are involved. In the event of this occurring, it can, at times, be several months before site work can even start.