Trying to figure out what these cracks are from. house was built in 1929, has plaster walls throughout. Someone said its the house settling and firebreaks in the interior of the wall.
Anyone see this kind of thing before? (images were edited to show more details)
It could be settling. I see from the window sill it is on an outside wall. You did not mention how long the cracks have been there, but I would go outside and check if there is any water damage happening at the foundation level, missing siding, etc., to rule out settling from decay. Otherwise those cracks, I would say are normal in many cases for a wood lath and plaster home, which should be the case for your 1929 home. The cracks follow the typical way the wood lath is installed.
