Advice on flat roof (pics attached)

MichelleSinead · 13-11-2019 10:17am #1

Looking for some opinions on this flat roof.
Back story is ex got his friend to build an extension on the house, said friend used to be a builder before the recession. They went with a flat roof with felt. However since it was done the roof has alot of water sitting on it when it rains, I understand there will always be "some" rain left but that the majority of it run off with the "fall" of the roof.

Picture one is the roof this morning, it had been damp over night but no rain, the patch at the back of the picture that is a different colour to the rest worries me. I don't know anything about roofs but to me it looks like that damp is seeping into the felt whereas the rest of the felt seems fine. I had the builder back out a few months ago and he said that part was "over torched" and he agreed to pay half to get someone else to fix it.
If anyone knows anything about roofs, does this look ok to you? is that normal to have patches like that that will differ in colour but not cause any issues?

Picture two is where there was a constant puddle of water, it wasn't running off at all behind the window so he put down that black stuff to "stop it" it hasn't stopped it. The puddle of water still sits there.

Appreciate any comments. Thanks.

listermint · 13-11-2019 10:18am

No pictures visible?

MichelleSinead · 13-11-2019 10:21am

Oh it won't let me post pictures because I am a new user.
Apologies I cannot get them to show automatically.

Effects · 13-11-2019 5:25pm

There's no puddle in either photo?

13-11-2019 5:47pm

My only concern from looking at that (and I presume I'm wrong, and it's a non-issue, but nonetheless) is that the felt seems to have been rolled the wrong way?

It looks like the roof falls away from the house, but the water will run into the 'joins' on the roof and perhaps sit there? if they were the other way (running vertically, instead of horizontally as per your photos) then the rain would run down them?

Perhaps I'm talking out my ass though.

Unrelated, but as far as I am lead to believe, water is only considered to be 'sitting' or 'pooling' if it stays in place for 48 hours or so. My googling before had lead me to believe that if it evaporates or runs off in less time, you generally don't have to worry about it. Again, i am not a roofer and that's from the internet so I could be talking nonsense.

Calahonda52 · 13-11-2019 6:40pm

The other view is that they started at the wall and worked out so the overlap is wrong. Perhaps I'm talking out my ass thoughts well.

kieran. · 13-11-2019 9:10pm

Calahonda52 wrote: »

The other view is that they started at the wall and worked out so the overlap is wrong. Perhaps I'm talking out my ass thoughts well.

Looking at the joint on the the left roof light the overlap does appear to be wrong

furandfeather · 13-11-2019 11:16pm

Its lapped the wrong way and over torched in a good few spots too. Is that a hole coming about 18 inches down the left hand side of the window, or just something lying on the roof?

Advice on flat roof (pics attached)

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