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Exploring Your Options for Low-Slope (Flat Roof) Roofing

Champion Restoration and Construction in Chantilly, VA, provides expert guidance on the best roofing options for low-slope (flat) roofs. Understanding the basics of roof pitches and selecting the right roofing material is crucial for ensuring proper drainage and durability.

What Is a Low-Slope Roof?

  • Definition: Low-slope roofs, often referred to as flat roofs, have a slight pitch but are not steep enough for shingles. They require a watertight membrane for proper drainage.
  • Pitch Ratio: The pitch is a ratio indicating the rise of the roof for every 12 inches or feet it extends across.

Low-Slope Roofing Options

  1. Built-Up Roof (BUR)
    • Made with bitumen and felts, laid out on a base sheet.
    • Less common today due to more efficient and environmentally friendly options.
  2. Modified Bitumen
    • Strengthened with polymers like Styrene-butadiene (SBS) or atactic polypropylene (APP).
    • Offers flexibility and durability, attached with adhesive and heat.
  3. Polyvinyl Chloride (PVC)
    • Common in commercial settings, especially restaurants.
    • Flexible and energy-efficient, keeping interiors cool.
  4. Thermoplastic Polyolefin (TPO)
    • Lightweight, chemical-resistant, and robust impact resistance.
    • Reflects heat, making it a popular choice for homeowners.
  5. Ethylene Propylene Diene Terpolymer (EPDM)
    • Fastened to an insulation board, can be attached with ballast.
    • Available in black and white, suitable for varied climates.


Choosing the right roofing material for low-slope roofs ensures proper drainage and long-term durability. Consider the specific features and benefits of each option to make an informed decision. Selecting the right material for low-slope roofs is crucial for proper drainage and durability. Options like modified bitumen, PVC, TPO, and EPDM offer various benefits tailored to different needs and climates.

For more information on Common Roof Repair Needs, click here.