More on this later.
Water running down chimney breast in attic.
If you have a broken gutter in heavy downpours water can run down the face of a wall and seep into any splits or cracks in mortar presenting as damp in your chimney breast.
3 exposed chimney brickwork gets damp and white lime deposits form on.
The chimney crown covers the top of the chimney to help protect it from the elements.
Is there any way water could still be getting down the flue due to gaps on cap.
The slanted crown should provide a downward slope that will allow for water runoff.
Water could get into the attic or above your ceiling and either drip to the floor or roll along the stringer the long piece of wood that spaces out the roof trusses and runs the length of your house.
Well the salts accumulated on the roof timbers are there due to years of tiny water ingress and condensation on the underside of the roof slates.
Every step has decrease the amount of water but i can t get that last bit.
Efflorescence on a chimney might be just cosmetic as wind blown rain wets the chimney sides and leaches out mineral salts which remain white on the masonry surface of the chimney.
Building faults that can cause chimney damp damp patches on the chimney breast brown or yellow marks on the walls and ceilings surrounding the chimney often point to damage caused by a water leak or building faults such as inadequate guttering missing roof tiles poor flashing details and absorbent masonry.
This runs down and wets the timber leaving minerals they dissolved along the way.
This can manifest in a number of ways such as.
1 water runs down the flue.
2 water runs down the brickwork inside the house or attic.
Repeated wetting and evaporation has concentrated those seen here.
If the stringer is un level water can travel a ways and even wind up at the chimney.
Further diagnostic inspection is needed.
Broken or blocked gutters can cause rainwater to filter and collect in unwanted areas causing water ingress and damp in your chimney.
I still have a small bit a water coming down during occasional heavy wind and driving rain.
