Discuss Soil pipe leaking at night only? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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eddiesaint

Hi there, we have been experiencing major problems in the previous 3 months regarding a leak which is causing havoc in our and our upstairs neighbours flats.
We are both private tenants within a 5 storey high council block of flats, we occupy the 2nd and 3rd floors, our neighbours the 4th and 5th levels. Roughly 3 months ago, I noticed some discolouration around my sons bedroom window (his room is located next to our bathroom). This also included what looked like white deposits on the painted walls. These stains have gotten worse and about a month ago we noticed that the painted walls seemed to be bubbling. We were able to peel off the paint like sheets of wallpaper all around the window seal with a radius of about 8 to 10 inches all around the window itself. Damp patches are also clearly visible in the plaster work around the window. To make matters worse, it seems that this leakage is exiting his bedroom by running off through my sons window seal to the outside window seal and dripping off outside.
It was then when I went upstairs to ask my neighbours if they had experienced any leaks coming from their flat. They showed me a damp patch on their kitchen wall / living room wall which had appeared in the last couple of weeks which is roughly about 18 inches raised up from the floor. We have managed to access the flat roof to look at any potential sources of water. We found the open ended cast iron (I think) soil pipe which looked like that the cement raised up around it was cracked. Also there seems to be ventilation pipes set back about 2 meters from the flat outer walls on the roof (Im not sure what purpose the serve but it seemed that the pipe directly above our neighbours kitchen wall / living room wall was missing a cone shaped weather cap). Thinking this was the cause, we called out the council who are responsible for the external maintenance of the building. They have only got back saying that the roof seems fine by their standards.
Whilst waiting for a report back from the council, my partner could hear water leaking down the bathroom soil pipe area (it is a boxed off section running internally straight down all the flats - as in kitchen on the top floor down to the 4th floor bathroom to 3rd floor kitchen etc) Big drops of water are clearly visible leaking from the area between the upstairs kitchen floor and our 3rd floor ceiling (bathroom) in the boxed off soil pipe area. I went upstairs to our neighbours this morning to check their soil pipe in the kitchen and the bathroom but came across nothing out of the ordinary, everything seems dry with no sign of leakage or water damage.
The problem I cannot get my head around is that the water leaks can only be heard or seen in the very early hours up until about 8 am in the morning although there are drips still coming down during the day, they are no way to the same extent as during the night.
The damp patches upstairs in our neighbours flat are not near any appliances that would use or disperse water.
There are no radiators in any of the flats, only underfloor heating which I have been assured by the council is not water run but electric only.
The leaking water seems to be clear and odorless.
It seems to have the same amount of water regardless of rain or clear nights / days.
To get a mental picture of our layout looking from left to right is:
Our son's window, his bedroom / bathroom wall with the soil pipe about 4 inches on the right hand side of the bathroom wall.
Any ideas please would be very very welcome as mould patches are starting to be visible on our sons bedroom wall and we want to try and resolve this a soon as possible.
I have also taken pictures so if anything needs showing in more detail, I will happily post them up for you to see.
PS Sorry about the life story but I thought that I would try to include everything I could think of!
 
Thanks for your reply and sorry for not getting back to you sooner, I hope these pics will be of some use to you.........
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Are ANY of the wc's in the flats not flushing away properly, i.e. are there any blockages or part blockages?
 
Your problem is hard to define. The fact that it shows more in the early hour suggests a problem on the rising main (water pressure is at its best during this period) It is also worth mentioning that once water/dampness is present in the building structure it accounts for accelerated corrosion where metal and mortar/concrete are in touch.
Find out from your insurance Co. if you are covered (normally for the damage caused rather than the problem) as it could be an expensive excise
Good luck
 
It couldnt be the wc in the flat above overflowing and the overflow leaking could it?. If the ballvalve in the wc is only leaking slowly it may not have chance for the water to build up during the daytime as it gets flushed regularly. Over night when it is not used the water level can rise and overflow. As soon as someone flushed the loo in the morning the overflowing stops.
 
Hi Again the photo of the outside of the property shows no overflows from wwp's it may be they run into a overflow stack or have been snaped off as it looks like the property was insulated and pebble dashed? Which would account for the dampness.
 
all right mate i would say with 99 percent certanty that your problem is flats above you're flat are having a problem with there cisterns overflowing at night when nobody is using any water and the main pressure is high and the washers in the ballcranes in the flats above cant cope and let the water down an internal overflow stack that is leaking and you are getting the water in on you. seen this problem many times in my plumbing carear
 
all right mate i would say with 99 percent certanty that your problem is flats above you're flat are having a problem with there cisterns overflowing at night when nobody is using any water and the main pressure is high and the washers in the ballcranes in the flats above cant cope and let the water down an internal overflow stack that is leaking and you are getting the water in on you. seen this problem many times in my plumbing carear
this is what 35 years experience would lead me to 99percent of the time its going to be a wc overflowing above try getting your neighbors above to check the levels in their cistens each morning before anyone has flushed
 
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