Technical
Below you will find a series of videos detailing the preparation required for dormers, fascias and flat roofs.
Dormer preparation for standing seam metal
Window detail for standing seam metal
Flat roof and parapet preparation for membrane
Lean to roof preparation for standing seam metal
Here is a diagram detailing the set-out process for correct falls in a standard flat/low pitched roofing scenario:
This diagram shows the buildup of a warm deck roof prepared for roofing membrane: