Commercial Gutters and Roof Drainage.
Getting water off a commercial roof and away from the building is what keeps the roof, the walls, and the foundation dry. We install, repair, and maintain gutters, downspouts, and drainage systems for commercial buildings across the Chicago area.
01 / Why Drainage Matters
A Flat Roof Lives or Dies by Its Drainage.
A sloped roof sheds water on its own. A flat or low-slope commercial roof depends on gutters, drains, and downspouts to move water off the surface and away from the building. When that system falls behind, water backs up, ponds on the membrane, overflows at the edges, and runs down the walls and against the foundation.
RX Roofing & Construction handles commercial drainage throughout the Chicago area. Gutters and downspouts are part of the same system as the roof, so we look at the roof and its drainage together and give you a straight answer on what the building needs.
Ponding on the Roof
When drainage backs up, water sits on the membrane, adds weight, and shortens the life of the whole roof system.
Water Against the Building
Overflow at the edges runs down the walls and pools against the foundation, where it works its way inside over time.
Tenant Disruption
Backed-up drainage that leads to a leak means wet ceilings, closed areas, and disruption for the tenants below.
02 / What We Install
Gutters and Drainage Built for Commercial Roofs.
Commercial buildings move a lot more water than a house, so the components are heavier and the sizing is different. We install and replace the full range of commercial drainage.
Box and Fascia Gutters
Large-capacity box and fascia gutters sized for the roof area they drain. Heavier gauge material and stronger hangers hold up to the volume a commercial roofline sheds.
Downspouts and Conductor Heads
Oversized downspouts and conductor heads carry peak flow from the roof down and away from the building without overflowing at the top.
Scuppers and Overflow
Scuppers and overflow outlets give water a second path off the roof when a drain clogs, which protects the membrane from ponding under a heavy rain.
Roof Drains and Strainers
Interior roof drains and their strainers are the primary path off many flat roofs. We repair, reseal, and clear drains so they carry water the way they should.
Discharge and Tie-Ins
We direct water away from the foundation and connect to site drainage where the building calls for it, so the water ends up where it belongs.
Gutter Guards and Screens
On buildings near heavy tree cover, guards and screens cut down how often the gutters and drains need clearing. We give you a straight take on whether they are worth it.
03 / Sizing & Slope
Sized for the Roof, Pitched to Drain.
Gutters and drains that are undersized for the roof area they serve overflow during heavy rain even when they are clean. We size the system to the roof and the rainfall it has to handle, and we set the slope so the runs drain fully after a storm instead of holding standing water.
Getting the sizing and slope right is the difference between a drainage system you never think about and one that overflows every time it storms. We assess the roof area, the number of outlets, and the existing drainage before we recommend a design.
- Sized to the roof area and peak rainfall
- Sloped to drain fully after the rain stops
- Enough outlets and overflow for a heavy storm
04 / Repair & Clearing
Keep the Water Moving.
Most commercial drainage problems are a clogged drain, a loose downspout, a failed seam, or a section pulling away from the building. Left alone, any one of them backs water up onto the roof or down the wall. We repair and reseal gutters, refasten runs that have pulled loose, and clear drains, scuppers, and downspouts so the system carries water the way it was built to.
Drainage is part of the roof, so it belongs on the same schedule. A maintenance program keeps the gutters and drains clear and documented alongside the rest of the roof.
- Resealing, refastening, and section repair
- Clearing drains, scuppers, and downspouts
- Handled on the same schedule as the roof
05 / One Local Team
Drainage Handled With the Roof, Not After It.
Gutters and drainage often get their own contractor and fall out of sync with the roof. We handle both, so the drainage is designed and installed as part of the roofing scope and nothing gets missed at the edges.
Commercial Roofing Systems
TPO, EPDM, PVC, and coatings, installed and maintained with the drainage designed to match the roof.
Commercial Roof Repair
When ponding or an overflow has already led to a leak, we find the source and fix the roof and the drainage together.
Commercial Siding
Metal wall panels, insulated panels, and fiber cement, installed and repaired and tied cleanly into the roofline.
06 / Common Questions
Commercial Drainage Questions, Answered.
Commercial buildings shed far more water and often have flat or low-slope roofs that rely on interior drains, scuppers, and oversized downspouts rather than a simple edge gutter. The components are heavier gauge, the sizing is larger, and overflow protection matters more because a clogged drain on a flat roof leads straight to ponding. We design the system to the roof and the rainfall it has to move.
Ponding that stays more than a day or two usually points to a clogged or undersized drain, a low spot on the roof, or a slope problem. Standing water adds weight and wears out the membrane early, so we find the cause in the drainage rather than just clearing the surface.
Often, yes. Many drainage problems are a clogged drain, a loose or pulling downspout, a failed seam, or a section that needs refastening. We assess the system and give you a straight answer on whether a repair solves it or a replacement is the better long-term investment.
On buildings near heavy tree cover, guards and screens cut down how often the gutters and drains need clearing. They are not maintenance-free, and the products vary, so we give you an honest take on whether they make sense for your building before recommending anything.
Yes. We handle the roof and the drainage as one scope, so the gutters, downspouts, and drains are designed and installed to match the roof. That keeps the edges from getting missed and keeps the whole system on one schedule with one local team.
07 / Get Started
Get Your Commercial Drainage Handled.
Contact us to talk through your commercial gutters and drainage, or call us at (224) 518-0278. We look at the roof and the drainage together and tell you the truth about what the building needs. We are available Monday to Friday 7am to 7pm and Saturday 7am to 5pm.