If you have been paying close attention to the types of roofs on commercial buildings in Chicago, you might have noticed that most of them are flat. Flat roof installations in Chicago are very common on grocery stores, schools, hospitals, factories, and many other industrial buildings across the country. This begs the question: what’s the deal with flat roofs—are they just a standard measure? While cost may be a factor, flat roofs seem to have the edge over peaked roofs (those found on residential houses), especially in commercial settings. Below are some of the reasons why flat roofs remain a preferred option.
- Cost Efficiency
Commercial buildings often have large footprints, which can be expensive to cover, roof-wise. Budget is therefore a major concern in both the construction and design phases, leading many to choose a flat roof. Flat roofs are typically easier and cheaper to install and require fewer materials. Costs associated with extra framing or complex designs are virtually eliminated.
An efficient drainage system is essential to ensure melting snow and rainwater flow away properly, preventing leaks and stagnant water. While a slanted roof can handle this for a home, large retail and industrial facilities generally use a flat roof with a dedicated drainage system because it’s less costly. Interestingly, although most commercial roofs appear flat, they usually have a slight pitch to avoid standing water.
- Practicality
Designing a sloped roof for a large commercial building can be extremely challenging. This is because the roof would need to incorporate numerous valleys and peaks or be built extremely tall. Many architects find this impractical for a building intended strictly for business operations. Additionally, building codes in cities like Chicago often place restrictions on the height of commercial structures.
To maximize a building’s square footage, industrial and retail facilities typically opt for flat roofs. Beyond simple practicality, high-sloping roofs can also detract from the aesthetic appeal of large buildings.
- Space for Additional Equipment
Commercial buildings often require industrial-grade heating and ventilation equipment that needs adequate space to be safely installed. Since placing such equipment at ground level isn’t always feasible, most property owners choose the roof instead. Mounting units above eye level ensures both public safety and reduced noise pollution.
Flat roofs therefore provide an ideal, secure location for heaters, air conditioners, and other machinery that might be disruptive. Although there can be risks associated with rooftop installations, the advantages generally outweigh any drawbacks. It’s no wonder that flat roofs remain a top choice for commercial properties nationwide.
