Chasing water pipes into wall - opinions

confused30000

Thanks again! I can see the pros and cons for chasing in, but also for leaving on the surface and boxing in. 

In terms of plans for that wall, there aren't any really. There won't be a wall unit on it. The washing machine will stay there and be housed in a cabinet, and there'll be a bit of a gap between the side of that cabinet and the opening into the extension. Thought was that a box for the cables could fill that gap from floor to ceiling and even create a kind of 'border' painted the same colour as the wall. The kids produce a lot of artwork so it we could even use some of it as a 'vertical art gallery' I suppose to hide it even more!

531063

Deffo need to be chased in if you have enough dept in the wall, just doing a similar job in my house see pics
as we chased them in, no problem with plastic pipes, if your gonna use copper pipes wrap them in some
duct tape or the like so they don't come into contact with plaster/cement

confused30000

Thank you, that's interesting to see! Are they just chased into plasterboard there?

531063

confused30000 said:

Thank you, that's interesting to see! Are they just chased into plasterboard there?

Yeah it's the dreaded dot n dab, so there is a gap between PB and blockwork

confused30000

531063 said:

confused30000 said:

Thank you, that's interesting to see! Are they just chased into plasterboard there?

Yeah it's the dreaded dot n dab, so there is a gap between PB and blockwork

Great, thank you. Are they 15mm pipes? And what happens after that, how do they get covered over again?

Bendy_House

First thing, find out if it's been D&D'd. If it has, you are probably talking about a 12.5mm layer of p'board sitting on around 10mm of dab = 20+mm. 

So, the amount of actual 'chasing' in to the 'wall' will be minimal to, possibly, zero.

If your DHW system is pressurised, then what I would do is run that in 10mm pipe, so guaranteed to not need chasing into 'solid' stuff.

How much disruption? A channel can be cut in to the p'board using only a craft knife (a DIY method...), and the strip of board lifted/hacked away. Simplest (again, DIY) solution then would be to run the two (ideally 10mm) pipes in there, and fill/surround them with spray foam. Once set, skimmed over. 

Bendy_House

Section62 said:

Bendy_House said:

That is a thick ex-external - wall, and the plasterboard has been likely D&D'd over it, so plenty of opportunity and room to do this. If the p'board is insulated - probably not if that section of wall is now fully internal - then that would make it super-easy to do even now.

How I wish I had X-ray vision for a job like this.

There's an area of plaster the pipes need to pass through which has not dried as quickly as the rest.  If chasing in is going to be the plan then the first thing to figure out is what is going on in that area. The working assumption should be that the wall isn't uniformly constructed... and then there is (hopefully) a lintel/beam in there somewhere.

I wouldn't say there is "plenty" of room to chase in just on the basis of the picture alone. I could guess at what is going on, but not say with enough certainty to justify wrecking a recently plastered surface on the off-chance I've guessed right.  Discussing other options with the kitchen fitters ought to be the starting point.

You have x-ray viz into my head, no question.

531063

confused30000 said:

531063 said:

confused30000 said:

Thank you, that's interesting to see! Are they just chased into plasterboard there?

Yeah it's the dreaded dot n dab, so there is a gap between PB and blockwork

Great, thank you. Are they 15mm pipes? And what happens after that, how do they get covered over again?

1st pic is 15mm, 2nd pic is 10mm, we will just plaster over them

confused30000

531063 said:

confused30000 said:

531063 said:

confused30000 said:

Thank you, that's interesting to see! Are they just chased into plasterboard there?

Yeah it's the dreaded dot n dab, so there is a gap between PB and blockwork

Great, thank you. Are they 15mm pipes? And what happens after that, how do they get covered over again?

1st pic is 15mm, 2nd pic is 10mm, we will just plaster over them

Thanks, is there no issues with them being so close to the surface?

531063

The 15mm pipe will be about 4/5mm below the finished plaster work, so no probs.