Kalamazoo’s roofing and exterior crew since 1998
Expert Flat Roof Replacement in Allegan, MI
Flat roofing is unforgiving. Unlike steep roofs that shed water naturally, a flat roof must be watertight and engineered to drain. In Allegan, “good enough” installation leads to leaks, mold, and structural rot.
Allegan presents a unique roofing landscape—from the historic brick commercial buildings downtown to residential homes with flat porches and sunrooms. These structures often suffer from the same problem: ponding water. At Lyster Exteriors, we don’t just patch leaks; we redesign the roof system to handle Michigan’s heavy snow loads and spring rains. Since 1998, we have been the technical authority on low-slope roofing in Allegan County.
The Core Problem: Ponding Water & Drainage
If water sits on your roof for more than 48 hours, the material will eventually break down. This is common in older Allegan buildings where the structure has settled.
The Lyster Solution: Tapered Insulation Systems.
We don’t rely on luck for drainage. For many projects, we install a tapered insulation system—essentially a rigid foam board manufactured on a slant. This creates a subtle, positive slope that forces water toward the drains and gutters, ensuring your roof stays dry and durable.
Our Flat Roofing Systems
We match the material to the building’s usage. We strictly use commercial-grade membranes from top-tier manufacturers.
1. TPO (Thermoplastic Polyolefin)
Ideal for: Commercial Buildings, Retail Stores, & Restaurants.
- Energy Efficiency: The bright white surface reflects UV rays, significantly reducing cooling costs during humid Allegan summers.
- Strength: TPO seams are heat-welded at over 1,000°F, creating a monolithic bond that is actually stronger than the sheet itself.
- Chemical Resistance: excellent for restaurants or businesses with rooftop exhaust venting.
2. EPDM (Rubber Roofing)
Ideal for: Residential Porches, Garages, & Historic Renovations.
- Durability: EPDM is extremely flexible, allowing it to expand and contract with the freezing and thawing of our winters without cracking.
- Longevity: A properly installed rubber roof can last 25-30 years with minimal maintenance.
- Aesthetics: The black surface is discreet and blends well with residential shingle roofs.
The Installation Process: Commercial & Residential
Whether it’s a warehouse or a back porch, our process focuses on the details that prevent failure.
The Tear-Off vs. Overlay Debate
While building code sometimes allows for a second layer, we almost always recommend a full tear-off. Old buildings in Allegan often have wet insulation or rotten decking hidden beneath the old tar and gravel. We strip it down to the deck, replace damaged wood, and start fresh. This is the only way to guarantee a long-lasting warranty.
Flashings & Perimeters
90% of flat roof leaks occur at the edges or penetrations. We pay obsessive attention to:
- Parapet Walls: We run the membrane up and over the wall, capping it with metal coping for a waterproof seal.
- Penetrations: We use prefabricated pipe boots and pitch pockets to seal around HVAC units and plumbing vents.
- Wall Intersections: We ensure proper counter-flashing where the flat roof meets siding or brick walls.
Frequently Asked Questions
How do I know if my flat roof needs replacing?
Look for “alligatoring” (cracked, reptilian-like skin on the surface), bubbles or blisters, separated seams, or water stains on your ceiling. If you have a tar and gravel roof, bald spots where the gravel has washed away are a bad sign.
Is TPO better than EPDM?
TPO is generally better for energy efficiency and commercial applications where grease or chemicals might be present. EPDM is often better for residential applications and roofs with high foot traffic. We will inspect your property and recommend the best fit.
Do you minimize disruption to my business?
Yes. We understand that you need to stay open. We maintain a clean job site, coordinate material deliveries to avoid blocking entrances, and work efficiently to get the building watertight quickly.
Stop the leaks and protect your investment.
Call the flat roof specialists at Lyster Exteriors. Request your Free Estimate today.
Our Services
Roofing and Exterior Services
Asphalt shingle roofing is the core of what we do, backed by full exterior services for Kalamazoo and Southwest Michigan homes.
Roof Replacement
Full tear-off and replacement with architectural shingles.
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Roof Repair
Leaks, storm damage, and missing shingles fixed fast.
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New Roof Installation
New construction roofs installed to manufacturer spec.
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Roof Maintenance
Inspections and upkeep that add years to your roof.
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Siding
Vinyl and fiber cement siding built for Michigan weather.
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Windows
Replacement and new-construction windows.
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Gutters
Seamless gutters and downspouts that protect your home.
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Doors
Entry and exterior doors that make a first impression.
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Decks
Custom decks that add outdoor living space.
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Insulation
Attic insulation that cuts energy bills.
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Certified Installers for the Brands on Your Home
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