Measure the roof edges and plan gutter placement
Gather gutters, downspouts, brackets, screws, sealant, and tools
Mark the slope line for proper drainage
Cut gutters and downspouts to the needed lengths
Attach gutter hangers or brackets along the fascia
Seal gutter joints and end caps
Secure the gutters to the hangers
Install downspout outlets and connect downspouts
Fasten downspouts to the wall with straps
Add splash blocks or extensions at the bottom
Test the system with water and check for leaks
Adjust slope and tighten any loose connections