"Keith (Dorset)" wrote in message
...
Hi, we are having a dormer loft extension built which needs to have a flat
roof. My late father was in the building trade and then a surveyor and
always swore to avoid them like the plague. Our prospective builder has
however told me that things are 'much better these days' and they offer a
25
year guarantee on a GRP flat roof.

We live on a very exposed area of coastline where the roof would be
subject
to a great deal of UV and windy weather (although the prevailing wind
comes
from the opposite side of the house.

Does a GRP (fibreglass) roof sound like a good idea, or is there another
material that might be more appropriate - i.e. do an equally good job at
less cost and/or need 'even' less maintenance?

Thanks in advance for any help.

Keith


Lead will probably last the longest, then "zinc", then GRP then ashphalt,
then felt.

It rather depends how long you plan staying there! Lead/Zinc are 80/40
years (impossible to say, really, but these are guidelines)

GRP (as your builder and the other poster says) 20-25

Ashphalt say 15-20 (not very common but I was offered this)

Felt 10-15

ALL THESE are subject to the job being done properly in the first place.

I had lead on mine and am very happy with it.


--
Bob Mannix
(anti-spam is as easy as 1-2-3 - not)