Flat Roof - Whats happened here

[chewymix]

We had our loft converted and part of that was covered by a flat roof. I dont think this has been caused by the warmer weather but today i see this on the edge of the flat roof. Does anyone know what the problem is and will it effect the roof in any way? The roof has been in place since February.

thanks

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• chewymix
• 26 Jun 2011
• 1

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• chewymix
• 26 Jun 2011
• 1

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• chewymix
• 26 Jun 2011
• 1

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• chewymix
• 26 Jun 2011
• 1

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• chewymix
• 26 Jun 2011
• 1

 

[Mw Roofline]

Could it be ladder marks? maybe the ladders were scraped against the welt on a hot day?

 

[chewymix]

there was scaffold up so i dont recall ladders ever being used, mind you its pretty high up so i doubt you'd want ladders up there anyhow.

Looks like the felt has been over heated or something ?

 

[Alastairreid]

Looks like the felt has been over heated or something ?

It has that!! and the mineral surface has ran off.

Apart from the aesthetics it wont cause your roof to leak any time soon.

 

[joe-90]

If it was an expensive job I wouldn't be happy with it. One day you will sell and one day a surveyor will pick it up and the buyer will want money off.

 

[chewymix]

well it was part of a bigger job however it was not inexpensive in the slightest therefore i am going to take it up with the guy as i think that, even if it does not effect the functioning of the roof, it looks crap.

 

[^woody^]

That is a monster size for the edge depth (150mm ?), and is a very poor detail with no drip at all.

It's either been stretch and over-heated on application or has been subsequently heated by the sun - possibly due to its depth being too deep and this had caused the mineral surface to detach and run down.

This will get worse and spilt in the short term

I would get the contractor back to sort out a proper drip and reduce the depth of edge return

 

[chewymix]

ummmm whats 'a propper drip' ??

thanks

 

[Alastairreid]

Does the roof drain to the back of the roof?

 

[Alastairreid]

ummmm whats 'a propper drip' ??

thanks

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• Alastairreid
• 19 Jan 2011
• 2

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• Alastairreid
• 27 Jun 2011
• 1

 

[chewymix]

OK thanks i see -

The roof drains to the left of the roof not the rear