Flat roofs have different needs than pitched roofs, especially when it comes to waterproofing. Here are some of the most common materials:
1. EPDM (Rubber Roofing)
A durable synthetic rubber membrane, EPDM is widely used due to its affordability, flexibility, and resistance to weather.
2. TPO (Thermoplastic Polyolefin)
TPO is a single-ply membrane known for energy efficiency and strong resistance to UV rays and chemicals.
3. PVC (Polyvinyl Chloride)
PVC roofing is highly durable and often used in commercial applications. It resists fire, moisture, and chemicals.
4. Modified Bitumen
This asphalt-based material comes in rolls and is applied with heat or adhesive. It’s known for being tough and weather-resistant.
5. Built-Up Roof (BUR)
A traditional method using layers of tar and gravel, BUR is extremely durable but heavy and labor-intensive to install.
Common Flat Roofing Issues
Like any roof, flat roofs come with potential problems — especially if not installed or maintained properly.
- Poor Drainage: Without the right slope or drainage system, water can pool, leading to leaks or structural damage.
- Leaks: Flat roofs are more prone to leaks due to standing water and the thinness of the membrane materials.
- Cracking or Blistering: Changes in temperature can cause expansion and contraction, which over time can lead to cracks or bubbles in the roofing material.