Box gutter and oversized profiles
Where residential tops out at 6-inch K-style, commercial work runs box gutter fabricated to the dimension the roof area needs — 7, 8 inches and up, in heavier gauge aluminum or steel.
We fabricate to the building rather than pulling a stock profile off a shelf. On older St. Louis commercial buildings with built-in gutters at the parapet, that's the only way it works.
Buildings we work on
Apartment and multi-family properties, where a property manager needs the whole complex done on a schedule that doesn't disrupt residents. Churches, which tend to have steep roofs, tall runs, and details worth preserving. Retail strips and offices, where the water has to stay off the sidewalk and out of the entry. Warehouses and light industrial, where the roof area is large and the drainage is the whole engineering problem.
Multi-building properties get phased so parking and access stay usable.
Drainage capacity
The math is roof area, rainfall intensity, and outlet size. Undersized drainage on a commercial roof doesn't just overflow — it backs up onto a low-slope membrane and ponds, which is how a gutter problem becomes a roof problem.
We size conductor heads and downspouts to the actual contributing area, not to what was there before. What was there before is frequently why you're calling.
Working with your schedule
Property managers get a single point of contact, a written scope, and phased scheduling. Occupied buildings get staging that keeps entries and fire lanes clear.
We carry commercial general liability and workers' comp, and we'll send certificates before we mobilize.
Questions people ask
Do you work on apartment complexes?
Regularly. Multi-building properties get phased so residents keep their parking and access.
Can you fabricate custom box gutter?
Yes, sized and formed to the building. Older St. Louis commercial buildings almost always need custom.
Do you handle church roofs?
We do. Steep pitches and tall elevations need the right equipment, and the details on an older church are usually worth preserving rather than replacing.
Are you insured for commercial work?
Yes — general liability and workers' comp, with certificates available before mobilization.
Do you also do the commercial roof?
John Beal Roofing does commercial roofing as well, so edge details and gutter can be handled by one contractor.
Free estimate
We measure, we look at the fascia, and you get a number in writing.
Talk to a real St. Louis gutter company
Third generation, family-run since 1947. Somebody picks up, day or night.