Red Seal Roofer Practice Exam 2026 – Complete Test Preparation

The commonly used flat roofing system is built-up roofing. This type of roofing consists of multiple layers of bitumen and reinforcing fabrics, creating a durable and weather-resistant surface. Built-up roofing provides excellent waterproofing qualities, making it suitable for flat roofs commonly found in commercial buildings.

Its construction often includes a base sheet, one or multiple layers of felt or fabric embedded in asphalt or bitumen, and a top surface, which can vary based on desired aesthetics and weather resistance. This system has a long track record for performance and longevity, which contributes to its widespread use in the industry.

While single-ply and modified bitumen roofing systems are also popular choices for flat roofs, built-up roofing distinguishes itself due to its layered construction offering enhanced stability and protection against the elements. Green roofing represents a different concept, involving vegetation and soil, which is less common for conventional flat roofing needs compared to the others.