Replacing a shed’s single-skin roof with sandwich panels: what to measure first
When single-skin sheeting is replaced by insulated roof panels, the roof outline tells only part of the story. Record the positions of the supports, draw a section through the eaves and inspect the ridge or abutment. A thicker covering can change where the drip edge sits in relation to the gutter. Here is how to take a shed from initial survey to an agreed sequence of work. The measurements support a quotation; a designer must check the structure and fixings for the chosen system.









