I am a board member of my townhouse homeowners association and our townhomes are unfortunately very tall (need a lift or 60 ft ladder to access the roofs) and also the builder made the roof one single contiguous roof (unusual for townhomes, common for condominiums). As such, the Association is responsible for the roofs.
The original installed roofs, which are modified bitumen, are failing very early in life (around 7-8 years). The early failure seems to be attributed to both poor installation and lack of regular maintenance. We've been given different stories from different contractors regarding whether replacement is necessary, or repairs are possible... but even those who say repair is possible, they all say modified bitumen requires a minimum of annual maintenance, if not more frequent than that.
Unfortunately, due to the height of our roofs, it limits the number of contractors who can do the work or requires the expensive rental of a lift. So we are going down the path of replacement, and want to install the roof that will require the least maintenance.
Which flat roofing system is the most maintenance free?