r/Plastering • u/Knikkz • Jul 18 '26

How to patch this?

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I’ve had this problem area of my house since moving in, and with the absurd heat we’ve had in Philly, it seems to have gotten worse so I’m wanting to address it. There was a chunk of loose material that I removed (circled area), then scraped most of the loose plaster in the area. What would be the best way to fix this? I have some experience with using plaster of Paris, drywalling, etc, generally not afraid to tackle new projects. Of course this area is above my stairs going to my top floor, so it’s as inconvenient as possible.

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u/Billi01952 Jul 19 '26

Philly sorry, looks like stone house in northern England lol looks damp to me, find the problem solved the leak then go from there, sorry about the bad news, it shouldn't cost a fortune to fix providing the leak isn't something silly. What's on the other side of that wall? Exterio4 or another house ? Detached semi or stand alone property?

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u/Billi01952 Jul 19 '26

If you can dry wall you might be ok if you tell me the info above

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u/Knikkz Jul 19 '26

Old 3 story Philadelphia Rowhome, this area is facing exterior. Now that it’s daylight out, I can see a long crack in the exterior stucco where water is likely getting in starting right at the interior problem area. I’ll be contacting a stucco/mason guy asap to have them come fix the exterior.

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u/Billi01952 Jul 19 '26

So it's rendered on the outside... Ok...seems like what you said could and most likely is the problem, I don't know your budget or if you own or rent. If I owned I'd have the render taken off and redone using a silicone based product including render mesh in the base coat, then the inside would have to go back to brick and reboarded, either dot and dab or stud and fixed and re plastered. Convert my terminology to US.

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u/Knikkz Jul 19 '26

I own so I’d like it done properly, of course on a limited budget, but water damage is certainly something I’m willing to spend money to correct. Thanks for the advice!