St. Louis Flat Roof Installation

Flat Roof Contractors St. Louis

Of all the different roof types, the flat roof is perhaps the most misunderstood. That said, there are circumstances where a flat roof is the best choice for a new building, whether it’s commercial or a residential home. The key to getting a weatherproof, durable flat roof design is to work with your local area’s most reputable roofing company.

In Missouri, a highly trusted roofing company is Home Perfect Exteriors. When you are ready to discuss your flat roof options, don’t hesitate to give our St. Louis roofing contractors a call at 636-266-2323! 

We want to get our local clients the best roof for their property, and we’ll work hard to install their new roofs correctly. We have experience with installing many different types of roofing from hipped roofs with architectural shingles to flat roofs. We offer a wide range of roofing materials for flat roofs, including TPO roofing and EPDM rubber systems.

Here’s what St. Louis property owners should know about low-slope and flat roofing systems.

All About Flat Roof Designs

Most people know that roofs need some kind of slope to let water run off it, so many “flat” roofs are more accurately described as low-slope, as there’s some kind of pitch. That said, their low pitch has many advantages.

• Flat Roof Construction

Found on both residential homes and commercial buildings, most flat roofs are constructed from metal, wood, or concrete and then covered with a waterproof membrane of some sort.

• Flat Roofing Materials

You can’t use traditional roofing materials like asphalt shingles on low slope roofs, but membrane roofing systems are common. Common roof types include modified bitumen, TPO, and EPDM roofing are all made of layers of different materials often called BUR or Built Up Roofing.

• Advantages of Low Slope Roofs

A flat roof is very economical to install and maintain over the years. They also create space for roof constructions like air conditioning units, solar panels, signage, skylights, or even a rooftop patio. On a residential home, they give a very sleek, modern look.

FAQs About Flat Roofs

• What’s the Difference Between Flat and Low-Slope Roofs?

Although the terms “flat roof” and “low-slope roof” are often used interchangeably, there is a small but important difference:

• Flat Roof: Technically, a flat roof has a pitch of less than ¼ inch per foot. However, no roof is truly flat—there is always a slight pitch to allow water drainage and prevent pooling.

• Low-Slope Roof: This refers to roofs with a pitch between ¼ inch and 3 inches per foot. These roofs still appear mostly flat to the eye but have a slightly steeper angle than true flat roofs, offering better drainage performance.

Both roof types require special materials (like TPO, EPDM, or modified bitumen) because traditional shingles won’t effectively shed water on such shallow slopes.

• What are Benefits of Low Slope Roofs?

1. Cost-Effective Installation

• Require fewer materials than pitched roofs.

• Simpler and quicker to install, reducing labor costs.

• Ideal for large buildings where sloped roofs would be impractical or expensive.

2. Easier Maintenance and Accessibility

• Safer and easier for contractors to walk on for repairs or inspections.

• Great for mounting HVAC systems, satellite dishes, solar panels, and signage.

3. Modern, Sleek Aesthetic

• Offers a contemporary look that’s ideal for modern residential architecture.

• Allows for rooftop patios, green roofs, or usable outdoor space.

4. Efficient Use of Interior Space

• Eliminates sloped ceilings and awkward attic areas.

• Maximizes vertical space inside the building.

5. Energy Efficiency

• Can be paired with reflective or cool roofing materials (like TPO or white EPDM) to reduce heat absorption.

• Enhances insulation performance with easier installation of rigid foam layers.

6. Sustainable and Eco-Friendly Options

• Suitable for green roofs (vegetation systems that reduce runoff and improve insulation).

• Can collect rainwater efficiently if drainage is well-designed.

• How Long Does a Flat Roof Last in Missouri Weather?

The lifespan of a flat roof in Missouri depends on the roofing material used and how well it’s maintained. On average:

• EPDM Rubber Roofs last 20–25 years

• TPO (Thermoplastic Olefin) Roofs last 15–20 years

• Modified Bitumen Roofs last 15–25 years

• Built-Up Roofing (BUR) systems can last 20–30 years

Missouri’s weather—characterized by hot summers, cold winters, and frequent storms—can take a toll on flat roofs. Proper installation, routine inspections, and timely repairs are key to maximizing lifespan. Choosing a reliable local roofing contractor like Home Perfect Exteriors ensures your flat roof is built to withstand Missouri’s extreme climate changes!

• What’s the Best Flat Roofing Material for Homes?

The best flat roofing material for homes depends on your budget, aesthetic preferences, and the climate in your area. However, some of the top choices for flat roofs are:

Request Your Free Flat Roofing Estimate in St. Louis!

With decades of experience in roof installation and roof replacement, Home Perfect Exteriors is the St Louis MO area’s most reputable roofing company. We will install, replace, or repair your flat roof with superior workmanship and integrity. If you’re curious about flat roofs and would like to learn more, contact us at 636-266-2323 right away!