Flat roofing is a roofing system where the roof surface has little to no slope—typically a pitch of 1/4 inch per foot or less. While not perfectly flat, the slight slope is designed to allow water to drain toward scuppers, drains, or gutters. Flat roofs are most commonly found on commercial, industrial, and multi-family buildings, though they are also used in modern residential designs.
Key features of flat roofing:
Design: Provides a sleek, modern appearance and can be used as extra functional space (e.g., rooftop decks, gardens, or HVAC equipment placement).
Drainage: Unlike pitched roofs, flat roofs rely on carefully designed drainage systems to prevent water pooling and leaks.
Materials: Common flat roofing materials include:
Built-up roofing (BUR): Layers of tar, asphalt, and gravel.
Modified bitumen: Asphalt sheets reinforced with fiberglass or polyester.
Single-ply membranes: Such as EPDM (rubber roofing), TPO, or PVC, known for flexibility and weather resistance.
Durability: Lifespan varies by material—EPDM can last 20–30 years, while PVC and TPO membranes can last even longer with proper maintenance.
Maintenance: Requires regular inspections and upkeep to check for punctures, cracks, or drainage issues, since standing water can quickly damage the system.
Cost: Installation can be more cost-effective than steep-slope systems, but ongoing maintenance is crucial.
Flat roofing is a roofing system where the roof surface has little to no slope—typically a pitch of 1/4 inch per foot or less. While not perfectly flat, the slight slope is designed to allow water to drain toward scuppers, drains, or gutters. Flat roofs are most commonly found on commercial, industrial, and multi-family buildings, though they are also used in modern residential designs.
Key features of flat roofing:
Design: Provides a sleek, modern appearance and can be used as extra functional space (e.g., rooftop decks, gardens, or HVAC equipment placement).
Drainage: Unlike pitched roofs, flat roofs rely on carefully designed drainage systems to prevent water pooling and leaks.
Materials: Common flat roofing materials include:
Built-up roofing (BUR): Layers of tar, asphalt, and gravel.
Modified bitumen: Asphalt sheets reinforced with fiberglass or polyester.
Single-ply membranes: Such as EPDM (rubber roofing), TPO, or PVC, known for flexibility and weather resistance.
Durability: Lifespan varies by material—EPDM can last 20–30 years, while PVC and TPO membranes can last even longer with proper maintenance.
Maintenance: Requires regular inspections and upkeep to check for punctures, cracks, or drainage issues, since standing water can quickly damage the system.
Cost: Installation can be more cost-effective than steep-slope systems, but ongoing maintenance is crucial.
