Green copper pipes

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6 Mar 2014

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Hello,
We’ve got some flooring up in places at the moment before putting new laminate down, and I’ve seen some very green copper central heating pipework in the sub floor.
It’s green where it goes through the wall into the next room. The sub-floor used to be full of condensation before we sorted air-bricks out a few years ago, so I’m assuming that’s the cause, but it interests me that it’s only really happening where it goes through the wall into the next room.
The pipe is bone dry and I’ve tested for leaks by placing newspaper underneath and it’s fine.
How much of a problem is this? I realise that it is not ideal, but considering it’s probably been like this a very long time, should I be immediately concerned?
Thank you!

We’ve got some flooring up in places at the moment before putting new laminate down, and I’ve seen some very green copper central heating pipework in the sub floor.

It’s green where it goes through the wall into the next room. The sub-floor used to be full of condensation before we sorted air-bricks out a few years ago, so I’m assuming that’s the cause, but it interests me that it’s only really happening where it goes through the wall into the next room.

The pipe is bone dry and I’ve tested for leaks by placing newspaper underneath and it’s fine.

How much of a problem is this? I realise that it is not ideal, but considering it’s probably been like this a very long time, should I be immediately concerned?

Thank you!