Installing the Acrylabs liner, the gray-colored two-coat base with reinforcing fabric was first applied to the trough and downslope portions of the gutter, covering the copper edge flashing.
Then, the reinforced base coat was applied to the upslope side, run roughly 18 inches up the roof. (The small roof areas on either side of the trellis framing were also covered with Acrylabs).
With the base coat dry, the dark-colored finish coats were applied. Here, the reinforced base coat is slit at the drop tube (left), the cut folds worked in with the finish coat (right) …
… down in to the copper drop tube (left). The completed Acrylabs application, which dries to an approximate 45-mil thickness (right).
After installing high-temperature underlayment, the upslope flashing was installed. Copper windowsill pan flashing is soldered to continuous apron flashing at the roof-to-wall junction. Standing-seam panels are locked into the apron flashing and drip-edge flashing along the upslope edge of the built-in gutter.
The dark-colored Acrylabs finish coat helps hide the built-in gutter from below and from the windows above.
Per the homeowner’s request, the lower roofs were dressed up with copper; the upper roofs were asphalt shingle.
The completed standing-seam copper roof (left). The ends of the built-in gutter extend beyond the building line below—the copper drop tubes ‘drop’ down from the roof overhang above (right). Copper downspouts will be installed later, as well as a copper gutter and downspout on the shed-dormer roof above.