water coming down vent pipe on roof

I renovated my bathroom and got a new electric fan fitted. The builder connected it to the old vent pipe that goes up vertically through the roof. In the rain last week water has been coming into the pipe and down into the vent/bathroom. THere is a cap on top of the pipe but the builder said its not the correct one. Looking at my neighours houses they all have the same cap as I do. Is this a common problem? Do I need to get a different cap? Who would fit this? Would appreciate any help - hopes this makes sense.

Please also see my other post this afternoon regarding water vapour condensing in pipes.
However in this case I suspect the sealing of the pipe where it passes through the roof may be at fault as opposed to the cap on the pipe outlet.


ONQ

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All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.

thanks again ONQ. At this stage I think I could set up a thread on one topic a week on things going wrong with my house. Sad. Was really enthusiastic about doing my renovation job and I am depressed by the amount of underhand, corner cutting and dodgy things I've come across. I know the obvious answer is to get an engineer on board throughout. I did get an engineer on for some of the bigger jobs we got done but he was useless.

Sorry, on your response above. Do you know the vertical pipes for venting from bathrooms I am talking about? Does your response mean that this could be an issue with all of these pipes as I would imagine in some of my neighbours houses they have the same setup but insulation between joists. Is there always a risk of the water in the pipe condensing in the pipe? These houses are from the 60's. Why was it done this way?

No the condensate would normally occur only when the attic is cold enough to quickly condense the water vapour - we were talking about venting in the other thread.

Here I would be concerned that the sealing of the pipe to the roof has failed or was done incorrectly and what you think is water coming down the inside of the pipe is actually running down the outside and coming in at the ceiling seal in the bathoom.


ONQ

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All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.

CBGB said:

thanks again ONQ. At this stage I think I could set up a thread on one topic a week on things going wrong with my house. Sad. Was really enthusiastic about doing my renovation job and I am depressed by the amount of underhand, corner cutting and dodgy things I've come across. I know the obvious answer is to get an engineer on board throughout. I did get an engineer on for some of the bigger jobs we got done but he was useless.

Click to expand...

Sorry to hear about that CBGB - we're here to offer advice on stuff like this.

As for the building professional, I would normally recommend an architect, not an engineer

Having said that the defects we're talking about here are detailed enough that an initial inspection would miss some of them.

You'd only find out about them in use, perhaps after the contract has flown the coop.

This is the benefit of getting it all done under a main contractor and having your architect withhold retention monies from him - he has to stand over all the work and if he doesn't you can use the retention to pay someone else to sort it out.


ONQ

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All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.

Quote ONQ "Here I would be concerned that the sealing of the pipe to the roof has failed or was done incorrectly and what you think is water coming down the inside of the pipe is actually running down the outside and coming in at the ceiling seal in the bathoom."

Not that I ever doubted you but this is what they said was also the problem!
They corrected the seal around the pipe and commented that the cap was old and should be replaced. So they might have got that bit right. But then when I went back up to the attic I noticed they hadnt connected the vent to the pipe to the bathroom vent was venting into the attic! I sure know how to picl them. I know they are a shower of waster so I am tring to get as much snagging out of them as possible and then get someone else in to go over it all.

Is it better to duct from a bathroom extractor fan to the soffit or to a vertical pipe? currently it is (poorly) connected to the vertical pipe. Because I was having problems with a leak around the pipe I was thinking about connecting the fan to the soffit via ducting. making the vertical pipe redundant.
Is this a better option? we have insulation between rafters so going through the soffit might bring more probelms.

Warm air rises - its better to go vertical under most circumstances.
Glad to see I sussed out the earlier problem - missed the follow up!


ONQ

[broken link removed]

All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.