Issues with replacement flat roof

[eBatch]

Recently had flat dormer roof covering replaced (new insulation, decking and felt layers).

Having got up there and had a look I see two areas of possible concern with the works. Best illustrated by the attached photos.

In both cases the issue relates to the corners where the flat roof joins the main roof.

In the left one, the 'felt' seems to be lifting away from the lead that goes up under the tiles, plus the lead seems to be rather up in the air.

In the right one there is what appears to be exposed bitumen surface (selvedge?) - i.e. not covered by mineral granules.

Would appreciate any thoughts / observations.

 

[eBatch]

Couple more slightly zoomed out photos

 

[eBatch]

And a few more photos giving the overall context. As is clear, the roof falls towards the rear and water runs off at the sides of the rear onto the meain roof.

 

[ree]

OP,
Your first two pics show very poor detailing.
In essence, a long back gutter has been created - a bad idea. Falls to a front gutter & RWP would have been better.
FWIW: the front fascia is rotting & should have been replaced.
The LH fascia doesn't look too clever either?

 

[eBatch]

Thanks for your comments. Any chance you could expand on what you mean by "show very poor detailing"?

The dormer is 40 odd years old and the falls to the rear were part of that work. Not surprsingly, after 40 years, the existing covering (and chipboard deck) had severly deteriorated and so the work recently undertaken was just to fix an immediate issue. For now I'm just a bit concerned about the original points I raised as shown in the 1st two pics.

 

[james65]

Hi,

There can be two issues:

1. The felt appears to be lifting from the lead flashing, and the lead itself seems improperly positioned.
2. There's exposed bitumen (selvedge), which should be covered by mineral granules.

Both issues could lead to water ingress. It's advisable to contact with roofing contractor to address these concerns promptly.