Plumbing

Can I use plaster bonding over copper pipes in a brick wall?

Anonymous user 08/07/2026 - 10:18 AM

Hi everyone, thanks a lot for taking the time to help me out. I've got about 60 cm of copper pipes from my radiator in the hallway that I'd like to hide in the brick wall. The pipes are a bit apart from each other and I've bonded them on top. My plan is to use some mesh, bond the whole wall again and then do a skim coat of plaster. However, I'm aware that copper pipes can expand and move slightly when they heat up and cool down. I'm just trying to figure out if this approach will actually work given my tight space constraints, or if there's a better way to tackle this. Really appreciate any advice you can give me!

GTA Handy Pros

Rating: 5 out of 5

5/54 reviews

Toronto

Your plan will fail because bare copper pipes wrapped in plaster will corrode and crack the wall as they expand. To fix this in a tight space, wrap the pipes tightly in denso tape (plumber's grease tape) or slide on a thin hairfelt sleeve before burying them. This creates a vital cushion that allows the pipes to expand safely while protecting the metal from the corrosive chemicals in cement and plaster. Once the pipes are insulated, you can safely apply your mesh, bonding coat, and final plaster skim.

Answered8 July 2026

Like

0

---