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ntyperteasy t1_j6ft3kq wrote

Try sticking a push pin into it. You will be able to insert a pushpin into drywall. Not into a plaster wall or cement board.

Plaster went out of style (well, cheaper alternatives won) in the 1950's to early 1960's. After that, houses were all drywall. Very old houses will have plaster over wood lath. During the 1950's and 1960's it was usually plaster over a product that looked a lot like drywall, but was made to replace the wood lath. The plaster will be thick and quite hard - makes a nice wall!

That said, it's always better to think of ways to land the screws on studs anyway. Try to re-imagine your plan if you can.

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togadiz OP t1_j6fvdil wrote

Ah that makes sense! I assumed it had something to do with age - the houses I have installed shelves in were all houses that were built in the 90s, where as my friends house , while newly renovated, was from the early 1900s.

Thank you for your thorough answer, it’s really helpful. I’ll look into trying to find a way to revamp the plan to find a stud as well.

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Bearded4Glory t1_j6k3rtj wrote

Plaster over blue board is still common in the northeast. Everywhere else uses drywall. Not sure why.

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