Any ideas on how to stop this roof leak

[Stotty1]

Hi
I noticed a leak in the loft around our chimney early in the year.
I have had 2 roofers round to sort it so far.
One of them did some repointing which didn't help so i got a second roofer to look and they sorted the leading and re cemented the top (see pictures below)

I dried it out with a dehumidifier last week and went up this morning in the hope it would still be dry after last night's rain, but it is wet again (see below)

I will give the last roofer a ring but does anyone have any ideas of what the problem could be?

Any ideas would be greatly appreciated.
Thanks

 

[foxhole]

Ridge tile has been place last , should have gone in before the lead as the joints not water proof.

 

[Stotty1]

Ridge tile has been place last , should have gone in before the lead as the joints not water proof.

Oh right thats an interesting point, thank you.

 

[datarebal]

Point the chimney and fit a saddle

 

[^woody^]

LOL is that building sand he's used there?

 

[Stotty1]

Point the chimney and fit a saddle

Thanks for the advice,
The chimney comes out on the ridge of the house though so im not sure how a saddle would work here?
Unless I have misunderstood how a saddle works. Apologies im not very knowledgeable when it comes to roofing

 

[datarebal]

Thanks for the advice,
The chimney comes out on the ridge of the house though so im not sure how a saddle would work here?
Unless I have misunderstood how a saddle works. Apologies im not very knowledgeable when it comes to roofing

standard flashing detailing

 

[Eccles]

Most house roofs are not "water proof" but that doesn't matter as long as they are rain proof and that means when it is lashing down and blowing a gale. Which is why most roofs in this country are well sloped and the tiles or slates overlap by several inches. However we all know that there a some spots where rain can get in unless a knowledgeable roofer has thought about it properly and these are often ridges and around chimneys. The permanent answer is usually lead sheet but it must always be over the ridges/tiles and wide enough to make a good overlap. Well there are roofers and others who claim to be roofers but do not follow these principles. I am not a roofer but I know about these things and what foxhole wrote is correct in my opinion. I did once have a problem which was different from the generality out lined above and may help: It was similar to yours but my expert roofer of many years nailed it in one:- "Those bricks are inferior and should never have been used to build a chimney, they are porous and after a few hours soaking from continual rain, the water gets in." he said. "The answer which will last you a good few years is to have the chimney rendered with lime mortar, you will see other chimneys around here where it has been done." He proceeded to do just that and charged me £250 at the time. The leaks stopped.

 

[catlad]

Stormdry will help.

 

[Stotty1]

Most house roofs are not "water proof" but that doesn't matter as long as they are rain proof and that means when it is lashing down and blowing a gale. Which is why most roofs in this country are well sloped and the tiles or slates overlap by several inches. However we all know that there a some spots where rain can get in unless a knowledgeable roofer has thought about it properly and these are often ridges and around chimneys. The permanent answer is usually lead sheet but it must always be over the ridges/tiles and wide enough to make a good overlap. Well there are roofers and others who claim to be roofers but do not follow these principles. I am not a roofer but I know about these things and what foxhole wrote is correct in my opinion. I did once have a problem which was different from the generality out lined above and may help: It was similar to yours but my expert roofer of many years nailed it in one:- "Those bricks are inferior and should never have been used to build a chimney, they are porous and after a few hours soaking from continual rain, the water gets in." he said. "The answer which will last you a good few years is to have the chimney rendered with lime mortar, you will see other chimneys around here where it has been done." He proceeded to do just that and charged me £250 at the time. The leaks stopped.

Thank you, that actually makes sense, as both roofers could not seem to find any issues.
I started to think it could be due to condensation when warm air in the chimney touching the cold loft air but I occasionally get it in the summer so the bricks be porous is a more likly cause.

Stormdry will help.

That Stormdry looks like good suitable stuff, just wish I was brave enough to get up there myself and give it a coat

 

[catlad]

It's not about being brave, if your not comfortable then don't do it!

 

[datarebal]

No guts no glory

 

[sxturbo]

The lead flashing under ridge tile doesn't look clever with the join in the middle of the ridge

I've had success with Thompson's water seal before gave it 3 coats and after 7 years the wall still beaded water like a freshly waxed car.

It's a cheap solution compared to the storm dry and would be worth using first to see if it helps solve your problems before splashing out big bucks on the storm dry.