THAT leak

[Pocster]

So after 2 yrs I decided to dig up the lane .

The leak if you remember is running over the slab and in .

Expecting to find great holes I found nothing .

The only thing of note is the ground is really crap ( almost soil ) in this trench and I’m hoping that’s simply the issue .

I can’t go much deeper as I can’t go too wide as the lane is needed for access .

Just dig a bit more and pour concrete in ??

 

 

[Pocster]

[Pocster]

I know no one knows ; including me !

So here’s the leak on the inside . Coming in on the red line . So over the slab , not the upstand . Assuming wall in lane is sat on the slab . Green line shows depth of slab - 14cm .

I guess I’m not going to find how it’s getting in but I am tempted to fill the trench with concrete with the plan being the rain then runs away from the build rather than straight through the ground and in .

[Pocster]

I know !

Almost impossible to give advice on .

So went a bit deeper . Hitting hardcore now - presumably the lane .

Going to mix cement and fill it in

 

 

[crispy_wafer]

So ingress between the slab and upstand.  Any way to expose outside the junction of the slab and where the upstand has been poured onto it, and then tank the bejesus all round it?

[Pocster]

31 minutes ago, crispy_wafer said:

So ingress between the slab and upstand.  Any way to expose outside the junction of the slab and where the upstand has been poured onto it, and then tank the bejesus all round it?

No . Upstand doesn’t leak . 
upstand is timber . Roof above is not leaking - tested this . Hard too see in the photo but the slab has a slight crack it after pouring . So water is tracking in via that route .

When very rarely have masses of rain even seen it push across the ceiling to the other glazing skylight and come through in the same place I.e on slab under upstand 

 

water is tracking in from that lane 100% certain - because a few years ago I put a hose on that wall and it rained inside .

Filled it in now - just wait for rain !!

[Pocster]

@crispy_wafer

Works finished for the day as its 3pm

So this is the glass unit above ground . Coloured line is leak side . The trench I’ve dug is otherside of the wall . That crap ground was coincidentally directly parallel to the window . Fingers crossed I guess !!

[crispy_wafer]

Crikey, thats a chasing tail job, hope you’ve got it?  How likely is that cement going to survive a winter or two?  I wonder if tar or something would be better.  The cement will hopefully give you a short term answer to if thats the issue

Edited April 1 by crispy_wafer

[Eric]

Where does the ASHP drain go to 👀

[Pocster]

12 minutes ago, Eric said:

Where does the ASHP drain go to 👀

Just onto the roof .

[Pocster]

1 hour ago, crispy_wafer said:

Crikey, thats a chasing tail job, hope you’ve got it?  How likely is that cement going to survive a winter or two?  I wonder if tar or something would be better.  The cement will hopefully give you a short term answer to if thats the issue

Yeah I know . I’ve got a bag of cold tarmac I can stick ontop . If this works and it doesn’t leak what should I fill it with ? . I did put fibres in with the sand / cement mix to reduce chance of cracking ….

Edited April 1 by Pocster

[Pocster]

What about tarmacing that entire section of the lane ?

Just trying to come up with plan b , c , d …… 

[SteamyTea]

I had a leak about 20 minutes ago.

If I drive up to yours, I will be ready to do another one.

More that willing to test all your handy work with my aqua vita.

[scottishjohn]

why not tank the inside?

[Pocster]

2 hours ago, scottishjohn said:

why not tank the inside?

Because water is still running over the slab and just pop out somewhere else is what worries me .

[Pocster]

Had plenty of rain still leaks !

 Could dig the trench the other side of my previous cementing I.e towards front of the lane . But not optimistic !

[Pocster]

[Pocster]

This track mark runs towards the front of the property I.e towards those quoins . Maybe it’s coming in from there rather than the side …??

[Pocster]

My preferred ‘solution’ is not to bother chasing my arse to find how the water gets in but simply manage it - like the entire basement does anyway . My issue is how do I make a waterproof ‘box’ that goes into the walk on glazing upstands that directs water into the dimpled plastic membrane that is attached to the ceiling …

[ProDave]

Your work in the lane, is really just trying to use the lane as a "roof" to keep ALL water off the actual slab below it to hide the leak.

 

As @crispy_wafer says you need to excavate around the offending window and seal the joint between slab and upstand to death.

[Pocster]

7 minutes ago, ProDave said:

Your work in the lane, is really just trying to use the lane as a "roof" to keep ALL water off the actual slab below it to hide the leak.

 

As @crispy_wafer says you need to excavate around the offending window and seal the joint between slab and upstand to death.

Nope 

The rain has pushed across to the other window in a storm . So the water will run somewhere . Last thing I want to do is ‘block’ it from the inside because where will it run then ?

That’s what worries me ….

[ToughButterCup]

Leak disclosing dye? 

[Pocster]

10 minutes ago, ToughButterCup said:

Leak disclosing dye? 

Yeah I tried that before . It runs everywhere!

[Pocster]

I think when the weathers better I’m going to sand bag that lane entrance and hose the floor there . So the water runs down the lane .

The lane is simply my likely suspect .

Then if no leak ( !!! ) try and isolate the corner wall and quoins and hose there .

Be nice to artificially reproduce the leak 

[BotusBuild]

10 minutes ago, Pocster said:

artificially reproduce the leak

The only way to go. I isolated a leaking window problem to the water getting in through one of those confounded brush seals into the frame. Now waiting for the fitters/manufacturers to cure their error.

 

How is the window upstand waterproofed on the outside? I presume there is some flashing. Is that cracked? Does it need replacing/repairing?