Water getting into cavity - no obvious signs

stuart45

Dan-Dan said:

joists   ?

Sorry, I meant joints.

Jeepers_Creepers

Dan-Dan said:

Jeepers_Creepers said:

Thanks.

And it only appears following particularly wet, wind-driven weather? Or does it also happen when it's just cold? 

We have been here 4-5 years and this is the first time it happened, it has rained heavily recently and been cold but its never shown before this way

How much of that wall is affected - it's hard to tell from that photo?

And, assuming that wall is built from concrete blocks, are the damp sections following mortar lines or the blocks themselves (looks like the former to me)?

Aaaaaand, does your wall have cavity insulation fitted? 

Dan-Dan

Jeepers_Creepers said:

Dan-Dan said:

Jeepers_Creepers said:

Thanks.

And it only appears following particularly wet, wind-driven weather? Or does it also happen when it's just cold? 

We have been here 4-5 years and this is the first time it happened, it has rained heavily recently and been cold but its never shown before this way

How much of that wall is affected - it's hard to tell from that photo?

And, assuming that wall is built from concrete blocks, are the damp sections following mortar lines or the blocks themselves (looks like the former to me)?

Aaaaaand, does your wall have cavity insulation fitted? 

Jeepers_Creepers said:

Dan-Dan said:

Jeepers_Creepers said:

Thanks.

And it only appears following particularly wet, wind-driven weather? Or does it also happen when it's just cold? 

We have been here 4-5 years and this is the first time it happened, it has rained heavily recently and been cold but its never shown before this way

How much of that wall is affected - it's hard to tell from that photo?

And, assuming that wall is built from concrete blocks, are the damp sections following mortar lines or the blocks themselves (looks like the former to me)?

Aaaaaand, does your wall have cavity insulation fitted? 

Hi
sorry for late reply
The damp is the shape of the blocks not the mortar lines?
Its about an 8th of the wall area, and isnt there at the moment ?
Nope, no cavity filling

cheers