Is this a damp problem in new home and If so what kind? Damp can be a major issue in the home. Find answers to questions or post your own here.

[Steve4Nature]

Hi, I'm new to this and looking to buy a new home and do it up. Apologies if this is a really basic question.

This patterning is in several places around the house. Its an old 1960's council house. Any help IDing the issue will be really appreciated.

[welsh brickie]

it could be mortar on the wall ties, causing the problem, hire a fibre optic camera and drill the cavity to check.