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Alois Roofing & Sheet Metal Servicing The Greater Milwaukee Area

Expert Commercial Roof Installation & Replacement throughout Southeast WisconsinWisconsin Commercial Roofing Replacement and Installation

While roofing materials continue to improve as the years go by, Alois Roofing believes a roof system's longevity still depends on the skill of those installing it. Our professionals don’t cut corners or rush through projects just to make a quota. We guarantee our work with excellent labor and manufacturer warranties and pride ourselves on doing every job the right way.

With decades of experience in the roofing industry, we are proud to offer excellent service for a number of your roofing and architectural sheet metal needs, including but not limited to:

Complete Roofing and Sheet Metal Services for Southern Wisconsin

Milwaukee    Madison    Racine    Fond du Lac    Janesville   
West Bend    Kenosha    West Allis    Sheboygan    Oak Creek   
Franklin    Wauwatosa    Men. Falls    Waukesha    Delafield   
Mequon    Pewaukee    Mukwonago    Brookfield    Glendale   
Hartland   New Berlin  Muskego   Mequon  Greenfield 

Alois Roofing is proud to serve commercial and residential property owners throughout Southern Wisconsin. Located just outside of Milwaukee in West Allis, we service areas around the state including but not limited to: 

Alois Roofing and Sheet Metal is a Milwaukee commercial and industrial roofing contractor serving all of Southern Wisconsin, contact us for a fast, free quote today!

Here to Help

Let Alois Roofing assist you in determining which roofing system will work best for your building and your budget. Together, we'll consider all the factors involved in your decision, including cost, and help you make the best choice.

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Repair Work

You know those phone calls you get from angry tenants every time there's a good downpour? Let’s put a stop to them—and to the handyman fixes that just aren’t holding up. What you need is quality roof repair work. And here’s why Alois Roofing and Sheet Metal should be your top choice:

  • Prompt response to your urgent roofing problems
  • Quality materials and workmanship - we get the job done right the first time
  • Experience with all types of commercial roofing
  • Friendly, safety-conscious technicians
  • Fair pricing


Commercial Roofing System Options

Thermoplastic Commercial Roofing Systems

Thermoplastic (Single-ply roofing)

Thermoplastic membrane, or TPO (thermoplastic polyolefin), is one of the most widely used commercial roofing materials—and for good reason. It is inherently more flexible than thermoset membranes and offers the advantage of being able to be reheated, softened, and shaped. It then hardens again after cooling. In contrast, thermoset membranes harden after one heating.

Characteristics of TPO single-ply roofing:

  • Excellent resistance to tears and punctures
  • Excellent resistance to UV rays
  • Flexibility allows for easier installation
  • Doesn’t need much maintenance
  • Available in white, which helps reduce solar heat gain
  • Environmentally friendly (No dioxins, chlorine, or other hazardous materials used in making them and are 100% recyclable.)


A properly installed thermoplastic membrane roof offers a service life of 10 - 20 years in our climate.

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Modified Bitumen Commercial Roofing Systems

Modified Bitumen

Modified Bitumen (MB) is an asphalt roofing membrane with Atactic Polypropylene (APP) or Styrene Butadiene Styrene (SBS) additives, which give it properties similar to thermoplastic or rubber. Fiberglass or polyester fibers are added during manufacture to enhance durability. It comes in rolls with a variety of surfaces ranging from smooth to a coating of mineral granules, copper, aluminum, or gravel. SBS modified bitumen roofs are installed with hot asphalt or cold adhesive, while APP modified bitumen roofs are almost always installed with a heat torch. To ensure proper drainage, modified bitumen roofing is only recommended for roofs with a slope greater than ¼” per horizontal foot.

Characteristics of Modified Bitumen roofing:

  • Expands and contracts with the movement of the building and temperature changes
  • Resists water intrusion and withstands foot traffic
  • Several surface finish options available to increase resistance to UV damage and oxidation
  • Can be surfaced with a reflective coating to extend the service life of the roof
  • Available in black or white


A properly installed thermoplastic membrane roof offers a service life of 10 - 20 years in our climate.

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EPDM Commercial Roofing Systems

EPDM Roofing

EPDM (short for ethylene propylene diene monomer) is a synthetic rubber, singly ply roofing membrane used for covering low-slope roofs. It is a thermoset material, which means once it cures after installation it cannot be reheated and softened to accommodate for shrinkage. EPDM roofing membrane is a popular choice for both new construction and re-roofing, with an estimated 20 billion square feet of it covering the roofs of commercial buildings throughout the US. Installation is much easier than built-up roofing systems, and there are no fumes or odors.

Characteristics of EPDM roofing:

  • Lower cost than any other roofing system
  • Ease of installation, no fumes or odors
  • Weighs less than other single-ply membranes
  • Available in rolls as large as 50’ x 200’ for fewer seams
  • Requires regular maintenance and will need to be re-seamed after 5 to 7 years
  • The black color absorbs UV light, which shrinks the membrane and makes it brittle—decreasing service life
  • Protective walk paths are needed to protect against punctures caused by stepping on any sharp object
  • Not eco-friendly due to oil-based byproducts used in manufacturing it


The service life of a properly installed EPDM roof varies depending on environmental conditions, drainage, foot traffic, and, of course, the quality of the installation. 

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Built-Up Commercial Roofing Systems

Built-Up Roof

The Built-Up Roofing System (BUR), also known as “tar and gravel” roofing, is one of the oldest roofing systems in the US. It is commonly used for flat and low-slope roofs on commercial buildings, schools, and government facilities. Built-up roofs are comprised of 3 or more alternating layers of bitumen (asphalt, coal tar, or an adhesive that doesn’t require heating) and reinforcing fabrics (glass-fiber or organic mats). This membrane is then covered with gravel (or some other aggregate), a layer of hot asphalt, or a coating of aluminum or elastomer.

Characteristics of Built-Up roofing:

  • Very cost-effective roofing
  • Multiple plies provide protection even if an outer layer is damaged
  • Excellent waterproofing
  • Low maintenance
  • Gravel (or another aggregate) surface withstands daily wear and tear well
  • Takes longer to install than EPDM roofing
  • Installation is messy and smelly
  • Traditional built-up roofing lacks the flexibility necessary for large expanses of the roof, particularly in cold climates. A cold built-up roof (applied with a sprayer or squeegee) performs better in our climate.


Environmental conditions, foot traffic, roof slope, and the quality of the installation affect the service life of a built-up roof. Additionally, the number of plies (the felt sheets sandwiched together) is a factor. 

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Metal Commercial Roofing Systems

Metal Roofing

Ridged sheet metal roofing is an increasingly popular alternative to built-up roofing for both low-slope and steep slope roofs. Although the initial cost is higher than built-up roofs and other flat roof systems, the longer service life and virtually total absence of maintenance costs make it an appealing alternative. Our metal roofing supplier offers a range of color options, which can be used to great effect in coordinating colors with other architectural elements on your building. The roofs look great, keep out water, and last a long time.

Characteristics of Metal roofing:

  • Longer service life than other roofing
  • Installation is quicker than other roofing systems and can be installed on an existing roof (no tear-off required)
  • Excellent fire resistance
  • Not affected by heat or cold
  • Good variety of colors and profiles
  • Low maintenance
  • Environmentally friendly (100% recyclable)
  • Proper installation is critical
  • Susceptible to denting from hail
  • Painted metal can peel, chip, and fade over time


Environmental conditions, foot traffic, roof slope, and the quality of the installation affect the service life of a metal roof.

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Green Vegetative Commercial Roofing Systems

Green Roofing (Vegetative Roofing)

Green roofing is a 21st-century take on the sod covered roofs used in Scandinavian home construction in the 1700s. Today, green roofing encompasses everything from rooftop container gardens to an entire roof surface covered in vegetation. Green roofs can also be roofs which energy-saving technologies like solar panels and reflective materials. A true “green roof” is a living, growing carpet of vegetation. These roofs are built with a layer of dirt over a waterproof membrane. The vegetation is usually drought-resistant grass, wildflowers, or landscaping plants. Irrigation systems are often incorporated into the installation. Besides adding visual appeal, a green roof can significantly decrease energy costs and reduce stormwater runoff. In addition to earning LEED credits for the Storm Water Design and Heat Island Effect, there are also financial incentives for green roofing. In Milwaukee, for instance, the Milwaukee Metropolitan Sewerage District (MMSD) offers a $5 per square foot subsidy for green roofing. Reflective heat-reducing roofs using Energy Star approved materials (not vegetation) are also eligible for a tax credit of up to $1,500 (on the cost of materials).

Characteristics of Green roofing:

  • Lower heating and cooling costs
  • Helps control stormwater runoff
  • Vegetation protects roofing material underneath
  • Can be used for recreational space for gardening
  • Reduce carbon dioxide in urban environments
  • Highest installation cost
  • Requires regular maintenance including replanting
  • The roof requires adequate structural support


Environmental conditions, foot traffic, roof slope, and the quality of the installation affect the service life of a green roof.

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