fibreglass roof ("flat") for rear extension - re-mortgaging problems?

aoleks

hi all,

we're in the late planning phases of a rear extension (nothing fancy, just extending 3.4m into the rear garden). we had a builder around (recommended by friends, we've seen work they've done at our friends) and he proposed a fibreglass roof. I know they can either be "flat" or pitched. if I was to go for a fairly flat roof, to keep things simple, will I have problems when I come to sell/re-mortgage?

I know it's an issue when the entire roof is flat, but if it's only an extension with a slightly pitched roof, will I get into trouble?

thanks

Doozergirl

No issue.  Sometimes there's a certain percentage of flat roof they may not like, but but for a modest extension, no issue at all.  

aoleks

great stuff, thanks. it will probably have a 10 degree pitch anyway, though I know that falls under the definition of flat.

grumbler

For 3.4m you can possibly achieve a decent pitch (12°+) and get a proper tiled roof.

Bendy_House

Yes, it'll have a slight pitch in order to allow rain to drain off, but there is now't wrong with a GRP roof. That's what we had on our recent extension - FlexiTec 2020.

youth_leader

Will you insulate it as well?  I lost my resin roof in Storm Arwen and the insurer's paid for the replacement roof, I paid extra for insulation, the difference is really noticeable.  The other alternative is rubber?

twopenny

I know my insurance company asked if there were any flat roof parts to my new house.
Don't know if that raises the premiums as i didn't but it sounded ominous.

Bendy_House

Yes, they'll typically ask for a rough %-age of 'flat roof', and - after having the ext built - I tick the 'up to 20%' box. It has never been an issue, and if they questioned it, I'm pretty sure they'd accept a GRP roof with a 20-year warranty as being as good as a slate roof.

More irony - we also have a pitched roof on a roof which is also GRP, but they don't 'ask' abut that as it isn't 'flat'... (That roof must be well over 25 year old now, and is perfectly fine.)