When it comes time for a complete roof replacement for flat roofs deciding what roofing system to install takes serious consideration. One such consideration is finding ways to extend the roof’s useful life and is a huge factor in deciding what roofing system to choose. As long as the sub-roof is in good condition extending the lifetime of a roof is as easy as choosing the right roofing system for the building.

Roofing systems for flat roofs include:

• TPO, thermoplastic polyolefin – single-ply, energy efficient, but requires a certified contractor to install
• PVC, polyvinyl chloride – the most durable single-ply material and comes with a lifetime warranty, and also the most expensive single-ply
• EPDM, ethylene proplylene diene monomer rubber – not as durable as PVC, but more cost effective
• APP modified bitumen, atactic polypropylene – multiple layers of roofing material, absorbs heat, requires an experience roofing contractor as it is difficult to install
• SBS modified, styrene-butadiene-stryene – multiple layers, labor intensive, requires a professional roofing contractor
• BUR, built up roofing systems – multiple layers, heavy which requires appropriate substrate to withstand the additional weight, great for high traffic areas
• Spray on Roof, polyurethane foam, acrylic or silicon spray – seamless installation, but costly

Reasons for choosing one system over another are contingent upon your budget, as each system comes with a different price tag, and the performance of the roofing system for your specific climate. Aesthetics also factor into the decision-making process, especially for features visible from the ground. Each system offers different advantages – energy efficient, ability to withstand collisions – breaking point, or withstand high traffic. Each one also offers different performance ratings and has different life spans. Finding a certified contractor knowledgeable in each system will help you make your decision based on your long-term goals for the building.