Hi @ivanptr,
Thank you for your question about some issues at your aunt's home.
The mould on the soffit indicates moisture has been allowed to sit on the board. It is very likely that there is a leak in the roof allowing water to get into the roof cavity. To confirm this, you would need to get into the ceiling cavity to inspect for leaks and further damage. If there is further damage, specifically to the roof trusses, there may be structural issues that would need to be addressed for the safety of anyone inhabiting the house.
If you were to get into the roof cavity to inspect further, please take caution as there may be asbestos-containing materials in the roof cavity depending on the age of the property. You can access resources from the Asbestos Safety and Eradication Agency for guidance on safe practices. Prioritise safety by educating yourself and seeking professional assistance when needed.
The cracked tiles indicate that there has been movement in the floor of the bathroom. This could mean that the tile substrate, likely a fibre cement sheet, has broken allowing movement in the tiles, or it can mean that the floor framing has rotted, allowing movement of the fibre cement sheet. Either way, this indicates a problem that must be addressed as the waterproofing membrane has likely been affected meaning there is an increased risk of moisture damage to the bathroom and the surrounding structure.
While they don't 100% confirm further issues, they are both red flags that say there is potential for further issues that should be assessed.
If your aunt hasn't purchased the home yet, having an assessment done by an independent building inspector would help you make an informed decision on the severity of the issues.
If your aunt has already purchased the property, I would have a licenced builder inspect these issues and give their recommendations.
If there are structural issues, it is likely outside the realms of a D.I.Y. fix and a licenced builder would be required.
Let me know if you have any further questions.
Jacob
