Tiling the edge of a tapered roof - rain water issue?

[andy57]

We are having a two storey side extension built which to maximise the land area available is not square - ie the outer side wall tapers as it goes forwards to follow the kerbline at the end of our close, as the turning head is not perpendicular to the front of the house.

The roof is pitched front to back to match the rest of the house.

Because of the this, the roof tapers inwards on the forward fall meaning that rain water will run down the outer tiles and fall off the edge.

Here is a picture to better describe it.

Is this something I should be worried about or have modified / corrected, and if so, what is the best method of stopping water falling off the edge of the roof without putting a big gutter up the front edge of the roof which would look ridiculous?

Any info appreciated.

 

[WabbitPoo]

Well, they did a neat job anyway!

I don't know the answer, but yes you'll need to do something or you will get a lot of staining on that wall, not to mention damp issues.

I await the answer too....

 

[ban-all-sheds]

I would have thought an upstand covered in lead would have been a good idea.

Bit late now.

Why on earth didn't the roof designer/constructor say/do/suggest anything at an earlier stage?

 

[oldbutnotdead]

Continuous dry verge would be the easiest way but it might look almost as ugly as the gutter. Or maybe a couple of lengths of secret gutter? Shame to have to put a bodge on a nice neat job though.

Think you'd have to mirror whatever you do on the other fall as well otherwise it'd look really silly.

Good luck!

 

[ban-all-sheds]

Would that be enough in heavy, possibly driving, rain?

With a lot of water coursing down the tiles I can see it just pouring over the edge of a dry verge...

 

[oldbutnotdead]

Would that be enough in heavy, possibly driving, rain?

With a lot of water coursing down the tiles I can see it just pouring over the edge of a dry verge...

Dunno- possibly not though hopefully the profile of the tiles would reduce the load on the bodge gutter. The stuff I was looking at has a 20 x 15mm channel which might be a bit puny especially with a few years worth of cack buildup.

The secret gutter ought to be a better bet- it would be doing the job it was designed for (ish!) but with a non-existent abutement wall.

Whatever, its a poor place to be starting from- whoever designed the job should have had a wee think about the issue. And you'd have hoped the roofers would have asked the question when they were setting out.

Think if it was my extension I'd have gone for a parapet wall and a wide lead secret gutter- bit late now though!

 

[noseall]

We used a few lengths of grp flat roof trim, fixed at the same place as the cloak. It formed a stop end preventing the water running off.

Something like this.

Obviously fitted in reverse to the image so that the angle formed an upstand.