Unusual Damp Spots

[pndavies]

Hi everyone, I’m new to the forum and to damp in general.

After storm Ciaran, some strange damp has appeared on my exterior lounge walls either side of a bay window.

I have never seen any damp like this before, it almost looks as though someone has splatted water at the walls!

Has anyone experienced damp spots like these before? Could anyone offer advice on what may have caused it and any possible fixes?

I understand it is difficult to diagnose from pictures alone but any help or advice would be great. Thanks!

 

[clone of lurpak]

@Casper 's old lady is the one to ask for advice about unusual damp spots

 

[Casper]

@Casper 's old lady is the one to ask for advice about unusual damp spots

Very good Clone of margarine.

 

[Monkey Boy]

Hi everyone, I’m new to the forum and to damp in general.

After storm Ciaran, some strange damp has appeared on my exterior lounge walls either side of a bay window.

I have never seen any damp like this before, it almost looks as though someone has splatted water at the walls!

Has anyone experienced damp spots like these before? Could anyone offer advice on what may have caused it and any possible fixes?

I understand it is difficult to diagnose from pictures alone but any help or advice would be great. Thanks!

Show pics in order of inside view then a corresponding outside view

 

[Stevieo]

Do you have that blow in cavity insulation by any chance?

 

[pndavies]

Thanks for all your replies.

The outside of the house is rough cast with no cracks or obvious entry points for water.

There is no cavity wall insulation either.

Thank you again for your help!