462a Bury New Rd, Prestwich M25 1AX
New torch-on felt flat roof with felt upstands and a roof outlet

How Long Do Flat Roofs Last, and When to Re-cover

A flat roof does not last as long as a pitched one, but how long depends heavily on the material and on how well it was laid. These are typical ranges, not guarantees.

Typical lifespans

  • Older pour-and-roll felt: often 10 to 15 years
  • Modern torch-on felt: around 15 to 20 years or more
  • EPDM rubber: commonly 25 years or more
  • Fibreglass (GRP): commonly 20 to 30 years

What shortens it

  • Water that ponds instead of draining
  • Poorly sealed edges and upstands
  • Foot traffic and things stored on the roof
  • Blocked outlets and gutters

Signs it can be repaired

One split, one blister or a failed joint on an otherwise sound roof can usually be patched with a compatible material.

Signs it needs re-covering

Leaks in several places, widespread cracking, or a deck that feels soft underfoot. A soft deck means the boards are wet, and covering wet timber only hides the problem.

Check the deck first

Whatever goes on top, the boards underneath decide how long it lasts. A roofer should check them before quoting.

Need this fixed? See our Flat Roofing service in Prestwich, or ask for a free quote.
Before & after

Roofing work: before & after

A typical job, before and after.

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