Solar in Louisville starts with a humid roof in a river valley, not with a clear sketch from above. Summer sun is strong when the sky opens, and shade from street trees takes it back on the old blocks. Algae and soft deck under a future array are the first problem. Hail and wind mark suburban slopes. Snow is brief, but a slick valley can still shed ice onto low porches that should not carry modules. If the shingles are dark, mossy, or failing, they come before any layout.
Someone needs to be on the roof. A sky image misses soft deck, chimney flashing that has left the mortar, and an electrical service as old as the basement. Ask who answers for a leak at a mount in a city where rain is frequent and wind-driven up the valley. Ask how the array comes off when the covering is replaced. Tight lots and alleys limit access. One large tree can own the southern sun on a newer lot. Say whether the electrical gear looks original.
Name the modules and the inverters. Afternoon shade from a maple or a neighbor is a different problem on a long string than on equipment that can isolate a corner. Know who you call when an inverter goes quiet in a gray humid week. Say if the gear should be yours. A garage roof is not the house roof. Heat trapped under the array on a valley afternoon belongs in the conversation about where it sits.
Permits and the utility permission to operate are part of the work. Ask who files them and what changes if a soft, algae-stained slope cannot take the layout. A bright July hour and a week of river cloud are not the same output, and that should be said before mounting. Skip a roof you already plan to replace. Low porch roofs are not spare space. Ice or a heavy shed of water off a valley can strike whatever sits below.
Say the age of the roof, which way it faces, and whether the canopy already shades it. Mention soft flashing or dark staining you can see from the yard. Call the number on this page.