The racking and flashing of a system is what holds the solar panels and attaches to your roof!
Flashing is what protects a house from leaking where the solar installation is drilled into the roof. This is why it is important that your solar company is investing in the best flashing possible. More often than not companies choose to save a few bucks and install cheap flashing because the homeowner wouldn't be able to tell.
Central Texas Solar & Lighting is different. See the video below on what we use and why it is solar's strongest attachment!