It depends on the material you use, but if your flat roof is installed correctly it should last for at least 10 years, and at least 20 if a material other than felt is used.<\/p>\n
Flat roofs should be built at a very slight incline. This will allow rain to drain off the roof, and prevent ponding.<\/p>\n
You should inspect your roof twice a year, ideally after rain or snow, to see if it\u2019s draining properly.<\/p>\n
Ponding is where you see pools of water appearing on your flat roof. Unless your roof is leaking or showing other signs of damage, you don’t need to replace it. When you do have your flat roof replaced, tell the contractor so they can find out the cause of the ponding.<\/p>\n
If you didn’t tell your contractor that there was a ponding issue, then they probably didn’t look at resolving it. To fix ponding, they would have to remove decking and joists and fit a new waterproofing system. It could double the cost of the job, but if your decking has deteriorated it should be replaced.<\/p>\n
Most material warranties come from the waterproofing layer manufacturers, and can last between 5 and 20 years. If your roofing contractor is on the manufacturer’s installer list, it might cover their work. It’s important that you always read through all the information given to you about your warranty so you know exactly what is included.<\/p>\n
If your existing roof is still in good condition but the membrane is getting old, it’s often not worth exposing the structure to the weather whilst the contractor strips off the old membranes. The contractor will leave them in place to act as a base layer for a new roofing system. As long as there are no other problems with your roof, then overlaying is a good way to replace your flat roof.<\/p>\n
If you have any more questions about flat roofing that aren’t listed here, fill out our form to ask a contractor.<\/p>\n","protected":false},"excerpt":{"rendered":"
How long should a flat roof last? It depends on the material you use, but if your flat roof is installed correctly it should last … <\/p>\n