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.
Roof leaking around chimney stack.
Leak from roof around chimney.
Apply roof cement to any gaps or cracks.
To repair chimney flashing leaks.
Over time the sealant can erode and create an entryway for water.
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.
Also check the timber at the rear of the stack for staining drips or wetness with the back of your hand.
I have a 1960 s detached with roofing felt and tiles.
Inspect the flashing for gaps or cracks.
It s installed as it is across other areas of the roof to ensure you have a watertight seal on the brickwork.
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.
Flashing is usually aluminum and is sealed down with tar or another waterproof sealant.
An option would be to cut the stack shy of the eaves and run it outside the roof plane in plastic this is professional work but clambering about on roofs is too.
Turbo poly seal makes it easy to seal between the bricks and it makes a perf.
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.
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.
For example your roof might have a leak through the attic vent or roof shingle at the top.
Have someone foot the ladder and tie it into the fascia.
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.
After the heavy rains of winter 2013 14 there was water ingress around the two chimney stacks through to the bedroom ceilings.
If you inspect the roof do it from a ladder dont go on the roof.
You have to determine accurately and definitely if possible where exactly the roof leaks.
I have tried replacing felt around chimney area.