If your roof is nearing the end of its lifespan but it’s still in good shape, re-roofing might be the best option for you. Re-roofing for a commercial property, which likely has a flat or a low-sloping roof, can be covered in built-up roofing (BUR), an asphalt-based substance. With BUR, the layers of different materials help make the surface more durable and waterproof. Other options for re-roofing include modified bitumen (MB or Mod Bit) and single-ply sheeting.
Re-roofing involves roofing substances being laid down in large sheets. The process can also be completed in phases that cover large spaces. However, that requires more labor and is more expensive.
On the other hand, a roof replacement is needed when re-roofing and repairs are out of the question. When a roof needs to be replaced, it’s no longer safe to keep as-is. All other materials must be torn off and replaced with an entirely new structure.