Splurge of water ingression during heavy rain.

[Alastairreid]

https://images.app.goo.gl/625D1gxkUnthDAW79
A chip that size would not affect the ridges performance.
I still think the lack of cavity trays is the problem.

 

[Mr Chibs]

I don’t know enough about cavity trays... am I correct in thinking they are installed as you build.

I have similar roof abutment, and no cavity tray... but my roof used to be flat before I vaulted it...
Mine just relies on Lead flashing. But the tiles are closer to the wall than the OP’s.

I don’t see how the channel is a good idea
Or is mine wrong?

 

[MoonMan2]

Just thinking;

This problem I have is obviously one of these long-term issues that could take months to isolate and resolve. In the meantime, while water is still splurging that same point in the ceiling; would it be a good idea to drill a small hole in the ceiling, to the loft space? This would at least help to limit the damage in the ceiling from the regular water ingressions while the fault finding process continues.

 

[freddiemercurystwin]

Is the ceiling flat or pitched?

 

[MoonMan2]

Flat.

 

[Alastairreid]

I don’t know enough about cavity trays... am I correct in thinking they are installed as you build.

Yes, but can be retro fitted.

I have similar roof abutment, and no cavity tray... but my roof used to be flat before I vaulted it...
Mine just relies on Lead flashing. But the tiles are closer to the wall than the OP’s.

I don’t see how the channel is a good idea
Or is mine wrong?

The secret gutter is just another method of weathering the abutment...more common in Scotland where sarkin boards are more commonly used on roofs.

 

[freddiemercurystwin]

Cut a hole in the bit of ceiling that's been leaking and have a look-see, it might reveal little, on the other hand .....

 

[MoonMan2]

Cut a hole in the bit of ceiling that's been leaking and have a look-see, it might reveal little, on the other hand .....

I haven't excluded the possibility of doing something like this down the line but just now I'd view cutting a hole of magnitude in order to stick my head through would seem to be a bit extreme at this stage.

The drilling of a hole, or two, into the loft space would be an attempt to reduce the impact of any damage that is occurring. Excess water would have a path to drain and there would also be some additional ventilation to aid with drying?

The small drilled holes could be easily filled once the water ingress issue has been rectified.

Anyone else got thoughts on this idea?

Has anyone done it before, am I the first to think of it?

Is there any particular reason why I shouldn't do it?

 

[freddiemercurystwin]

Well as you don't seem to have a scooby as to to whether it's leaking from the ridge, immediately above the damp patch, at the eaves or from inside the adjoining cavity wall or somewhere else then opening up a hole may potentially allow you to track the path of the leak to the source. But you carry on with pointless bits of filler or sticking jcloths in-between some tiles.

 

[RayCaister]

Drill small hole in ceiling and ... https://www.aldi.co.uk/ferrex-99d7m...8bV6lORg4f7Zl3mkHmBoCehUQAvD_BwE&gclsrc=aw.ds

 

[MoonMan2]

Thanks, RayCaister, that's now a third reason for drilling a small hole.

1) Provide drainage.
2) Provide ventilation.
3) Insert inspection camera.

 

[MoonMan2]

It just occurred to me that due to loft insulation, it wouldn’t really be possible to insert an inspection camera through the ceiling.

I'm thinking of getting a loft hatch.

 

[Londoner2]

In london over past 6 weeks we had 2 episodes of heavy rain, i had a loft conversion in 2016 with 3 x velux fitted.

On 21st july very heavy rain, on 1 window rain started to leak bottom left corner, after rain stopped i looked and cleared some debris and was good after this.

Then v heavy rain again on 1st week of aug, a slight wet patch developed on top of frame of same velux window, rain stopped but no debris found.

Since then we have had rain but no leaks. I think the sheer volume of water meant it came over the protective flashings and caused a minor leak somewhere.

 

[MoonMan2]

I had another roofer out last week to take a look. He spent quite a bit of time looking at the roof. He came to the conclusion that the roof was unlikely to be causing the ingress and that the problem was likely coming from elsewhere.

A couple of days later, I looked at my neighbour's house (which is identical to mine, only without the extension) and noticed he has two vent pipes where my extension room is built over.

In the picture below I've drawn, in blue, the outline of my extension on my neighbour's house:

The white plastic pipe on the left is an overflow from the bathroom toilet and the one on the right (I believe) is some sort of overflow from the hot water tank.

In looking at my bathroom toilet and lifting the hood off the tank, I saw that it has been trickle overflowing. I immediately cut off the water supply to this toilet and within a couple of hours, a wet patch on my extension ceiling began to dry out. You'll see from the above pic that the white plastic pipe is just-on or just-below the roofline of my extension.

So I pulled back the lead flashes to see if I could find the 'missing' pipe. The yellow circle indicates where I believe it should be:

A bit closer:

No pipe to be seen, it's just out-of-sight, by the roofline.

Now, if you check this thread:

https://www.diynot.com/diy/threads/water-pump-stopped-in-central-heating.575440/page-4

you will see that I installed a new water pump in my central heating system a couple of days before I noticed the bad water splurging on my ceiling.

Now this is where my story becomes complicated. I believe the thermostat on my hot water tank was faulty as I had to wrench it up to full in order for it to heat the water, albeit to scalding hot. So is the reason for the main splurge of water in my extension ceiling because of the new, better working pump, operating with a faulty thermostat, causing it to eject water from the external 'exhaust' pipe, right onto my ceiling?

I replaced the thermostat on Saturday and tried heating the water (thermostat set at 60 degrees) and the system worked well; in fact the bath actually filled up quicker! More importantly, there was no water ingression to my extension ceiling.

Have I solved this kinundrum? Did the builder's simply attach the extension, ignoring these vent pipes?

The nuisance fact is when I installed my water pump there was bouts of very heavy rain for that day and the next couple after it.

The next bout of heavy rain will reveal all...

 

[Alastairreid]

Sounds promising, good bit of detective work.