Jump to content

Water pooling on my new flat roof


Ben100

Recommended Posts

Hi all, I’ve just had my new flat roof installed but water seems to be pooling in the corner by the gutter. Is this an issue or something I shouldn’t worry about? I’ve checked for any blockages but there’s nothing stopping the water going into the gutter. It just looks like there is a dip the water is collecting in.

8FE171BB-EEFE-442C-AB56-E5177F6EA34D.jpeg

C81B7046-C7D5-46E2-8524-9E600D0F622A.jpeg

Link to comment
Share on other sites

39 minutes ago, tonyshouse said:

Where is the outlet? Is there a sluice in case it blocks? 
 

puddles on flat roofs are in my opinion unacceptable 


The outlet is in the far corner, through the parapet wall. It’s still under construction, so it’s just a lead outlet at the moment.

 

I'm not keen on the water pooling here. Maybe it can be fixed with some more layers of felt or resin?

Link to comment
Share on other sites

10 minutes ago, markc said:

If the outlet is in that corner then it’s probably just being held back by the membrane and a bit of leave debris. If the outlet is in another corner then you have a dip … how deep is the puddle?


The outlet is in that corner. I've checked, there's nothing holding it back. The membrane is above the felt. It's definitely a dip, probably around 15mm deep.

Edited by Ben100
Link to comment
Share on other sites

2 hours ago, nod said:

Puddles are unavoidable and will soon dry out 

 

I don't agree. They are avoidable and it might take weeks to dry out.

If this is new build then it is unacceptable and should be remedied, and not by patching.

 

What does the design say the slope should be?

Whatever, the fact appears to be that part of your roof has negative slope, and cannot drain until the water is 15mm deep.

Link to comment
Share on other sites

2 hours ago, Ben100 said:


It does have a fall, so it shouldn’t pool. I think it’s a dip in the roof there.

Most of the large commercial roofs are like ponds But still passed 

Without putting a steep fall on it It’s difficult to avoid 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...