Your roof is designed to move water quickly and safely away from your home. But even a well-built roof can develop problems if water isn’t draining properly.
The photo above shows a common roofing detail we often inspect on homes in Shiloh, O’Fallon, Belleville, and other Metro East communities — a roof slope where water is directed toward a gutter and downspout system.
When gutters and downspouts are installed correctly, rainwater flows off the roof, into the gutters, and safely away from the foundation. But if drainage isn’t working properly, water can collect on the roof or overflow from the gutter system.
At Barringer Brothers Roofing, we regularly inspect roofs throughout Southern Illinois to make sure drainage systems are working as they should and protecting homes from water damage.

How Roof Drainage Works
Every roof is designed to guide water in a specific direction.
Shingles are layered so that rain flows down the roof slope toward the gutters. From there, gutters carry water to downspouts that move it safely away from the home.
When this system works properly, water never has a chance to sit on the roof or collect near the foundation.
However, if debris builds up or gutters become clogged, water may back up and create problems.
Why Downspouts Are So Important
Downspouts are often overlooked, but they play a critical role in protecting your home.
A properly placed downspout helps:
• Move rainwater away from the roof quickly
• Prevent gutters from overflowing
• Protect siding and windows from water damage
• Reduce the risk of foundation problems
Without effective downspout drainage, rainwater can end up pooling near the home instead of draining away.
Common Roof Drainage Problems Homeowners Don’t Notice
During roof inspections in Shiloh, O’Fallon, Fairview Heights, and Belleville, we often see drainage issues that homeowners never notice from the ground.
Clogged Gutters
Leaves and debris can prevent water from flowing through gutters properly.
Improper Downspout Placement
If downspouts are too small or poorly positioned, water may not drain fast enough during heavy rain.
Debris in Roof Valleys
Roof valleys carry a large amount of water. If debris collects there, water flow can slow down.
Worn Shingles
Aging shingles can allow water to seep underneath if drainage is slowed by debris or standing water.
Why Roof Inspections Are Important for Drainage Issues
Many roofing problems begin with small drainage issues that are easy to fix if caught early.
A professional roof inspection helps identify:
• Areas where water may collect
• Debris buildup in gutters or valleys
• Early signs of shingle wear
• Downspout placement problems
• Potential leak risks
Routine inspections help prevent minor issues from turning into expensive repairs.
Signs Your Home May Have Roof Drainage Problems
Homeowners should consider a roof inspection if they notice:
• Water overflowing from gutters during rain
• Leaves collecting in gutters or roof valleys
• Water stains on siding
• Pooling water near the foundation
• Shingle deterioration near gutter edges
Even if your roof appears fine from the ground, these signs can indicate hidden drainage problems.
Roofing and Gutter Services in Shiloh, O’Fallon, and the Metro East
Barringer Brothers Roofing provides roofing and gutter services for homeowners across Southern Illinois and the Metro East, including:
• Shiloh
• O’Fallon
• Belleville
• Fairview Heights
• Swansea
• Mascoutah
• Troy
• Edwardsville
• Collinsville
Our team provides:
• Roof inspections
• Roof repairs
• Roof replacements
• Gutter installation
Regular inspections help ensure your roofing system continues protecting your home properly.
Schedule a Roof Inspection in Shiloh or O’Fallon
If your roof hasn’t been inspected recently, it may be a good time to have a professional take a look.
Barringer Brothers Roofing helps homeowners across the Metro East and Southern Illinois identify roofing problems early and keep their homes protected from water damage.
Contact Barringer Brothers Roofing today to schedule a roof inspection or gutter evaluation.