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Commercial

Flat & Commercial Roofing for Metro Detroit Businesses

TPO, EPDM, and modified bitumen systems built to shrug off Michigan winters — installed around your business hours, not ours.

Flat & Commercial Roofing for Metro Detroit Businesses — BH Roofing
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Ponding water that never dries out? A seam that splits every time the temperature swings? A commercial flat roof in metro Detroit fails differently than a pitched one — so we track down the real source of the leak and fix it with the right membrane for your building, not a patch that lasts one season.

Flat & Low-Slope Roofing Systems We Install

Flat and low-slope roofs don't shed water the way a pitched roof does — they rely on a continuous, watertight membrane and clean detailing at every seam and penetration. Choosing the right system for your building matters as much as the install itself. Here's what we work with across metro Detroit, Wayne, Oakland, and Macomb counties.

  • TPO — a light-colored, heat-reflective single-ply membrane that helps trim summer cooling costs on commercial buildings.
  • EPDM rubber — a durable black membrane that handles Michigan's freeze-thaw swings well and is straightforward to repair.
  • Modified bitumen — a tough, multi-layer asphalt-based system well suited to high-traffic roofs and smaller low-slope sections.
  • Roof coatings & restoration — a seamless, reflective coat that can add years to a sound roof without a full tear-off.

Flat-Roof Leak Repair, Seams & Drainage

A flat roof rarely leaks directly above the stain you see inside — water travels along the deck before it finds a way down. We trace the leak back to its true source instead of chasing symptoms, then fix it right the first time. Common trouble spots on metro Detroit flat roofs include:

Where ponding is the real culprit, we correct the drainage itself — tapered insulation, crickets, or added drains and scuppers — so water actually leaves the roof instead of sitting on it.

  • Open or failed seams where two membrane sheets meet
  • Cracked or lifting flashing around walls, curbs, and edges
  • Failed seals around vents, drains, HVAC units, and other penetrations
  • Ponding water that sits for days and slowly breaks down the membrane
  • Clogged or undersized drains and scuppers that trap water up top

Why Flat Roofs Take a Beating in Michigan

Low-slope roofs work hard in this climate. Because they hold water and snow longer than a steep roof does, our weather finds every weak seam and low spot. Understanding that is half of building one that lasts.

We spec and detail every roof with these conditions in mind — the right membrane, proper slope to drain, and reinforced flashing right where Michigan weather hits the hardest.

  • Freeze-thaw cycles that expand and contract the membrane and pull tired seams apart
  • Heavy snow load and standing meltwater that stress the deck and drains
  • Ice buildup at edges and drains that backs water up under the membrane
  • Spring wind and hail storms that puncture, lift, or scour the surface
  • Hot, humid summers and UV that bake and dry out older membranes

Roofing That Works Around Your Business

A roof project shouldn't shut you down. Whether you run a storefront, a warehouse, a restaurant, or an office, we plan the work to keep your doors open and your people safe on-site.

A maintenance program is the cheapest roofing you'll ever buy — routine inspections and small repairs regularly add years to a commercial roof and let you budget ahead instead of reacting to an emergency.

  • Scheduling around your operating hours wherever the job allows
  • Phasing larger roofs in sections so parts of the building stay in use
  • Keeping entrances, walkways, and parking clear and protected
  • Daily cleanup and a magnetic nail sweep before we leave the site
  • Preventive maintenance programs with scheduled inspections to catch small issues early

Low-Slope Sections on Homes, Too

It's not only commercial buildings. Plenty of metro Detroit homes have a flat or low-slope section that shingles simply can't protect — and those spots are where a lot of interior leaks quietly begin.

We treat these home sections with the same true membrane systems — EPDM or modified bitumen — and the same careful flashing we bring to commercial work, so the low-slope part of your roof isn't the weak link anymore.

  • Flat porch and entryway roofs
  • Rear additions and sunroom tie-ins
  • Detached and attached garage roofs
  • Dormers and second-story overhangs with a shallow pitch

What's included

  • Free on-site roof inspection and moisture check
  • Written scope with system options — TPO, EPDM, modified bitumen, or coating
  • Seam, flashing, and penetration detailing done by hand
  • Drainage and ponding correction where the roof needs it
  • Tear-off and disposal, or a recover system where the deck allows
  • Manufacturer-backed membrane warranties and our workmanship guarantee
  • Daily cleanup and a magnetic sweep of the property
  • Optional preventive maintenance program with scheduled inspections
Why homeowners choose us

The BH Roofing difference

Local crew, Michigan know-how

We work these lake-effect winters, freeze-thaw swings, and spring storms year in and year out, so we know how flat roofs fail here — and how to build one that doesn't. A licensed and insured local team you can actually reach.

The right system for your building

No one-size-fits-all sales pitch. We spec TPO, EPDM, modified bitumen, or a restoration coating based on your deck, slope, roof traffic, and budget — then explain the trade-offs in plain English so you can decide with confidence.

We plan around your operations

Your business keeps running while we work. We schedule around your hours where the job allows, phase larger roofs in sections, and keep entrances and parking clear — so a roof replacement doesn't cost you a week of revenue.

Answers

Flat & Commercial — FAQs

How much does a commercial flat roof cost in metro Detroit?

Every building is different, but in the metro Detroit market a new flat-roof membrane like TPO or EPDM typically runs in the $4 to $9 per square foot range installed, while a coating or restoration often lands lower, around $1.50 to $4. Ponding, insulation, and deck repairs move the number. We'll give you an exact figure after a free on-site inspection.

How long does a flat roof replacement take, and will it disrupt my business?

Low-slope membrane systems go on faster than most owners expect. A typical single-building replacement often takes a few days to about a week, depending on size, tear-off, and weather. We schedule around your operating hours where we can and phase the work so your business keeps running. Your written estimate lays out the full timeline up front.

TPO or EPDM — which membrane is better for my roof?

Both are excellent single-ply membranes; the right pick depends on your building. TPO is a light, heat-reflective sheet that can lower summer cooling load, which suits many Detroit-area commercial roofs. EPDM is a proven black rubber membrane that handles freeze-thaw cycles well and is easy to repair. We'll walk you through both and recommend what fits your deck and budget.

Can you fix ponding water without a full roof replacement?

Often, yes. Ponding usually comes from low spots, clogged drains, or crushed insulation rather than the whole roof failing. We find the real cause and can add tapered insulation, crickets, or drains to move water off the roof. If the membrane underneath is still sound, a targeted fix or a coating can extend its life without a full tear-off.

Do you help with insurance claims for storm damage to a flat roof?

We can help. After a spring wind or hail storm, we document the damage to your flat roof with photos and detailed notes, and we'll meet your insurance adjuster on-site to walk through it. Keep in mind you're responsible for your policy deductible — we never discount or waive it. Our job is an honest assessment and quality repairs.

Can you install a flat roof on my home's porch or addition?

Absolutely. Many Detroit-area homes have a low-slope section a standard shingle roof can't protect — a flat porch, a rear addition, a garage, or a shallow dormer. Those need a true membrane like EPDM or modified bitumen, not shingles. We install and repair these residential flat sections with the same systems and detailing we use on commercial buildings.

Ready for a roof you don't have to think about?

Get a free, no-obligation estimate today. Fast, reliable scheduling across metro Detroit whenever our schedule allows.

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