If you have installed a patio pergola using the SkyLift Roof Risers, and you need to replace the roof shingles, you first need to access the condition of the through roof-flashing. That flashing, (typically Ultimate Pipe Flashing (UPF) that SkyLift sells as part of their Roof-Riser system), creates a weather seal around SkyLift roof risers using a flexible boot that fits tightly around the vertical supports.
The boot should be free of cracks or damage, and not show any signs of degradation through exposure to weather or sunlight. Unless the UPF is in near-perfect condition, we recommend replacing the flashing when re-shingling a roof.
To replace the through-roof flashing, use a two-part flashing such as the Garrdal system. As you remove the existing roof shingles, cut away the original flashing as well. Then install the new shingles and integrate the two-part Garrdal system per the manufacturer’s instructions.
If the existing UPF is in good shape and you opt to reuse it, start by carefully removing the shingles around the flashing apron to expose the attachment nails. Slide a shallow flat-bar under each nail head. Then lift and remove the nail without damaging or distorting the apron.
When the apron is loose, slowly slide the flashing boot up the roof riser. To keep the boot from inverting and becoming damaged, rotate the flashing slightly side to side as you lift it.
Install the new shingles up to roof riser, and carefully slide the UPF back down until the apron meets the plane of the roof. Then properly re-integrate the flashing apron with the courses of new shingles as you reroof.