Can anyone help me at all. My dad recently died and he helped me with everything in my home. I feel so useless now as he died unexpectedly of sepsis. These marks have appeared on my house. The house is 10 years old. The marks are only on one side of the house and there are no damp marks or areas inside. I just would like to know what sort of tradespeople I require to fix it. Thank you in advance for any help.