Roof on new extension

[Igee]

I have recently had a single story extension built, apart from minor problems,the builder(who is not a roofer)has had a number of attempts at tiling the roof (3 himself) and then a roofer was brought in by the builder to rectify his errors, now the roof looks better but still does no seem right, the problems are, the rafters a 16 deg pitch ,but the tiles on a large area of the roof are sitting at between 7 and 15 deg (this is a double hip roof, with two Keylite windows) the builder, and it seems the building inspector, think this is ok, could anyone please tell me if this is correct, tiles used are Marley Mendips. I've read a few comments about roof problems, but not with these exact issues. Would be grateful for any positive suggestions as I'm very concerned about any leaks that could occur. Thank you.

 

[datarebal]

Not without a picture

 

[noseall]

Mendips (smooth) will go down to 22.5 degrees. Definitely not suitable for 16 degree pitch. Marley 'Wessex' are the only ones suitable for that pitch.

 

[catlad]

That's not correct redland regent 12.5°

 

[^woody^]

the rafters a 16 deg pitch ,but the tiles on a large area of the roof are sitting at between 7 and 15 deg

I can't even begin to visualise that even after a drink, some spice off eBay and 1/4 lb of cheese before bed.

 

[freddiemercurystwin]

Mendips (smooth) will go down to 22.5 degrees. Definitely not suitable for 16 degree pitch. Marley 'Wessex' are the only ones suitable for that pitch.

Mendips go down to 15°.

 

[noseall]

That's not correct redland regent 12.5°

I was referring specifically to Marley.

 

[noseall]

Mendips go down to 15°.

Correct.
My old catalogue says 22.5. My new-ish pocket catalogue says 15.

Sorry for the confusion. I shall ignore the old catalogue from now on. What year is it....?

 

[pilsbury]

I can't even begin to visualise that even after a drink, some spice off eBay and 1/4 lb of cheese before bed.

Before you could offer advice on my roof you had to have a lie down and take some pills. A pattern is forming.

 

[Nige F]

I can kind of visualize the variations in tile angles - Am I right in thinking Chinese Pagoda type roof , where it flattens @ the bottom. My last bungalow had this ( stupid) feature with rosemarys - 30 degree pitch - fine then the bottom 4 courses were bloody near flat stripped and re felted all round fitting sprockets to get a sensible angle into the gutter.

 

[^woody^]

Before you could offer advice on my roof you had to have a lie down and take some pills. A pattern is forming.

It was your roof that flipped me over the edge. My shrink said that I should not even be visiting the roofing forum.