We're looking to build a rear extension to our house later this year. My preference initially was to have a tiled pitched roof as this will match closely to the existing look of the house and should last the longest compared to flat roofs. The roof will also be installed with velux/skylight style windows. The architect has come back and said he can make a pitch roof with 15deg slope which I believe on research now is on the limit for most low pitched tiles (i.e. Sandtof 20/20 or Marley Wessex). Also from my searches there seems to be a number of people experiencing leaking roofs especially with skylights in which I assume is also on the 15 deg limit. I’m now wondering if this is the best way to go or just go with a flat roof. Would a 15deg tile pitch roof be better without any skylights, thus minimising discontinuities in the roof? Would it be better/possible installing Velux windows designed for flatroofs on a pitched roof? We don’t need these windows to be opened, only for light.
On looking at flat roofs, the common types seems to be EPDM or GRP. EPDM seems cheaper with a slightly shorter lifespan (still good at 30years+) – whereas GRP is should last longer, though more expensive and very dependant on good installation.
Any advice/recommendation as to which system is better in the long run?
On looking at flat roofs, the common types seems to be EPDM or GRP. EPDM seems cheaper with a slightly shorter lifespan (still good at 30years+) – whereas GRP is should last longer, though more expensive and very dependant on good installation.
Any advice/recommendation as to which system is better in the long run?