How long does roofing felt last under tiles?

Question

Had a roofer mention the felt might be perished. How long is it meant to last under tiles before it starts causing problems?

Ronnie · Answer

Hi Claire, roofing felt (the underlay beneath your tiles or slates) generally lasts around 40–50 years, depending on its quality, ventilation, and exposure. Traditional bitumen-based felts from older roofs often start to perish or become brittle after 30–40 years, especially near the eaves where moisture and UV exposure are higher.

Modern breathable membrane systems have a longer lifespan and provide better moisture control. If your roofer has noticed perishing felt, it’s worth inspecting the roof space for signs of sagging, damp insulation, or daylight through gaps — all indicators the underlay may be failing.

We can assess the condition for you and advise whether a local repair or full re-felt would be the best long-term solution.

Casey · Answer

It can vary depending on what brand and also what the conditions are like in your area I.e if you live coastal or midlands but if you look up the manufacturers description online it should usually tell you there

Michael · Answer

It all depends on the person who installed it and the material used but it should last at least twenty years

Luke · Answer

Typically felt will last 15\20 years if played correctly and if a good quality.

How long does roofing felt last under tiles?

Follow Us

Cookies

Manage Cookies

Essential cookies

Analytics & Tracking

Advertising