Sometimes a leak starts in a different place but finds its way to the chimney and then visibly enters the inside of a room at the point of the chimney.
Roof leaking around chimney stack.
But if you have problems with water leaking around the outside of your chimney down into your walls you may have a problem with worn out flashing or sealant.
After the heavy rains of winter 2013 14 there was water ingress around the two chimney stacks through to the bedroom ceilings.
Also check the timber at the rear of the stack for staining drips or wetness with the back of your hand.
Chimney flashings are normally responsible for the majority of chimney stack leaks the things to look for from inside the loft are staining damp or running water around any sides of the chimney stack brickwork near roof height.
The bedroom wall adjacent the chimney keeps getting damp patches the ceiling slopes towards the chimney wall and patch mainly on slope.
Or you may have a poorly designed valley at the bottom of the roof slope and directly above your chimney that catches debris snow and ice.
Turbo poly seal makes it easy to seal between the bricks and it makes a perf.
Inspect the flashing for gaps or cracks.
Your chimney flashing is the area where your chimney comes through the roof or close to the roof and prevents moisture and other debris from getting in between the chimney and roof.
Apply roof cement to any gaps or cracks.
I have a 1960 s detached with roofing felt and tiles.
A roofing company repaired the stacks and treated the render but during the following winter one chimney stack appeared to be waterproof but the other not.
If you inspect the roof do it from a ladder dont go on the roof.
For example your roof might have a leak through the attic vent or roof shingle at the top.
Leaks in the chimney flashing flashing will traditionally be applied around the base area of the chimney where the stack meets the roof structure.
Over time the sealant can erode and create an entryway for water.
You have to determine accurately and definitely if possible where exactly the roof leaks.
Flashing is usually aluminum and is sealed down with tar or another waterproof sealant.
Have someone foot the ladder and tie it into the fascia.
Leak from roof around chimney.
To repair chimney flashing leaks.
I have tried replacing felt around chimney area.