Plastering & Rendering

Help with cracks along joining walls

Anonymous user 9 March 2024 - 3.32 PM

I recently purchased a new house, had a survey done prior to purchase and all was good. I recently took down a clothes rails that was in an alcove in the bedroom. The next day I noticed a long crack that spread across the wall that had one of the long screws was in. When tapping the wall under the crack it sounds solid and then above the crack it sounds hollow. Last night I then noticed the same crack on the lounge wall which joins to the bedroom. It’s at the same height and spreads the whole wall and again had the same sounds when tapping above and below the crack. As a side I noticed that in the corner of the living room where the crack starts the recently painted wall is orangey, not sure if related but thought worth mentioning! As a side we also generally have 50-65% relative humidity in the house but it fluctuates and we try to keep as low as possible through ventilation and using a dehumidifier. House was built pre 1900s and is a terraced purpose built ground floor maisonette with double glazing. Any help is much appreciated! Thank you!!