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If you can stretch to rubber, and look to be in the house for a long time, deffo do it.
My builder uncle will never touch felt, it always fails and needs much more maintenance than the alternatives. It’s especially prone to heat damage, which will only get worse with more frequent heatwaves.
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Presume it was felted because 12 deg is not enough for tiles to function properly.
You might be able to find a special tile designed to function where the pitch is limited.
Worth noting that roofs are only felted / fibreglass / Rubber when tiles cannot be used as simply, they aren't as good.
As with all roofing finishes, they are all only as good as the quality of install. So the question is better phrased as what is the finish my carefully selected trade is most willing to use, and why?
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Go rubber, felt doesnt last and you've done well to get 25 years out it that's for sure.
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ectoplasmosis
Howard
konastab01
@M4xime
Hivemind, I'm having to re-do our 25 year old roof on the extension which has a 12 degree pitch. Currently has felt on it and am wondering whether to change the material. I think fiber glass is out for this type of roof and could do either 1) low pitch tiles (often composite) 2) rubber roof or 3) felt again.
Any suggestions?