Air pockets are indeed a great way to further insulate the roof.
Standing seam metal roof installation.
When installing a standing seam it is strongly recommended that all asphalt shingles are removed before the installation in order to prevent avoid the telegraphing effect where horizontally installed shingles punch through the vertical sheet metal roofing panels causing unsightly dents that cannot be fixed removed.
Running solo 15ft panels on an open section of roof with no protrusions or obstacles.
Ordering and applying trim the most common flashing for standing seam roofing is the ridge cap which is used at the.
This technique provides the cleanest look and shows no exposed fasteners.
Installation of panels roof panels we require at least a 3 12 pitch for standing seam panels to ensure proper water drainage.
This estimate usually includes removal of the existing material but disposal can cost extra.
Provided the roof deck is in good shape installing an appropriate standing seam metal roofing such as batten seam over purlins is a viable way to install a new metal roof over the existing asphalt roof.
If you have a complicated design you may pay more.
This video shows how to install standing seam panels when hemming the eave and rake.