Commercial Roofing in Denver

A commercial roof protects everything under it: your inventory, equipment, tenants and business. In Denver, that roof faces large hail, heavy snow loads, intense high-altitude UV and constant freeze-thaw cycles, often on a flat or low-slope surface where water has nowhere to go. Mountaintop Roofing & Solar installs, repairs, coats and maintains commercial roofs across the Denver metro, with a focus on keeping your building dry and your business running.

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Commercial roofing services

New roof installation and full replacement. Complete tear-off and installation of flat, low-slope and steep-slope commercial roofing systems.
Roof repair and leak response. We find the source of the leak, not just the wet spot on the ceiling, and repair membranes, seams, flashing, drains and penetrations.
Roof coatings and restoration. A coating can add years of life to a sound roof at a fraction of the cost of replacement.
Inspections and condition reports. Photo-documented roof inspections for owners, property managers and buyers.
Storm damage and insurance claims. Documentation of hail and wind damage for your insurance carrier.

Commercial roofing systems we install

TPO (thermoplastic polyolefin). A white, heat-welded single-ply membrane that reflects sunlight and is popular for flat roofs.
EPDM (rubber). A durable single-ply membrane with a long track record on low-slope buildings.
Modified bitumen. A multi-layer asphalt-based system that stands up well to foot traffic and hail.
Built-up roofing (tar and gravel). A traditional multi-ply system still found on many older Denver buildings.
Metal roofing. Standing seam and other metal systems for long service life and snow shedding. See metal roofing.

Not sure which system fits your building? We'll look at your roof deck, drainage, budget and how long you plan to own the property, and recommend the option that makes sense. Learn more about flat roofing.

Commercial roof coatings

If your roof membrane is still structurally sound but showing its age, a fluid-applied coating can seal it, reflect heat and extend its life without a full tear-off.

Lower cost than replacement, with less disruption to your tenants and operations.
Reflective surfaces that can reduce cooling costs in Denver's strong summer sun.
Seamless protection over seams, fasteners and minor cracks, where most flat-roof leaks start.

We apply both silicone and acrylic roof coatings and recommend the right one for your roof:

Silicone coatings: highly resistant to ponding water and UV, which makes them a strong choice for flat roofs where water sits after rain or snowmelt.
Acrylic coatings: bright white and highly reflective for lower cooling costs, and a cost-effective option for roofs with good drainage.

A coating isn't right for every roof. If the membrane is saturated or the deck is damaged, we'll tell you, and explain why a replacement is the better investment.

Built for Colorado weather

Hail. The Front Range is one of the most hail-prone regions in the country. We recommend systems and coverboards that hold up to impact, and we document storm damage for your insurer.
Snow load and ponding water. Flat roofs need proper slope, drains and scuppers. We check for ponding water, which shortens roof life and adds weight.
UV and temperature swings. High-altitude sun and freeze-thaw cycles break down seams and flashing. Reflective membranes and coatings help.
Local codes. Denver and surrounding cities have their own permit and energy requirements for commercial roofs. We handle permits and make sure your roof meets them.

Properties we work on

We work on a full range of commercial properties, from office buildings and retail centers to warehouses, industrial buildings and apartment complexes. We work directly with building owners, property managers and HOAs, and we schedule work to keep disruption to tenants and customers to a minimum.

Commercial solar

Planning to add solar to your building? Because we install both roofs and solar, we can make sure your roof is ready to carry panels for the next 25 years before they go on.

Why businesses choose Mountaintop Roofing & Solar

Local and established. A Denver roofing contractor serving the Front Range, with a BBB-accredited business.
Honest recommendations. Repair, coating or replacement: we recommend what your roof actually needs.
Clear communication. Photo documentation, written estimates and one point of contact from start to finish.
Residential and commercial experience. See our roofing contractor services.

Commercial roofing FAQs

How long does a commercial flat roof last in Denver?

Most single-ply and modified bitumen roofs last about 15 to 30 years, depending on the system, installation quality, maintenance and hail exposure. Regular inspections and timely repairs make the biggest difference.

Should I coat my commercial roof or replace it?

If the membrane is still sound and the insulation is dry, a coating can extend its life at a lower cost. If there is widespread damage, wet insulation or a failing deck, replacement is the better investment. An inspection will tell you which.

How often should a commercial roof be inspected?

At least twice a year, typically spring and fall, and after any hail or major wind storm.

What causes most flat roof leaks?

Failed seams, flashing around rooftop units and penetrations, clogged drains and ponding water. Most leaks start at a detail, not in the middle of the membrane.