New build in copper

[Mgrant]

Hi has anyone got much experience of doing new builds in copper? Got some to do there traditional joist not the engineered ones.

 

[lame plumber]

90 percent of us probably have

 

[Gray0689]

90 percent of us probably have

Lol think you may be right

 

[Mgrant]

Thanks ones I have worked on have all been plastic as I am relatively new to plumbing. When notching the the areas allowed it it usually to do one longish notch and run the heating and the hot and cold pipework in that?

 

[Gray0689]

No single notches for me
Bit of hair felt stop any noise

 

[SimonG]

New build shouldnt be notched, should be drilled through the neutral axis of the joist. LABC up here are really hot on it.

 

[Mgrant]

I have seen all four pipes in the same notch is heat transfer not a problem here?

 

[Gray0689]

I have seen all four pipes in the same notch is heat transfer not a problem here?

How is it not a problem if there tight together

 

[Mgrant]

So possibly a separate notch for the heating to the hot and cold pipe work

 

[Gray0689]

You be better getting someone in to show you

 

[Mgrant]

I have seen it done before were they did a notch for all 4 pipes and put hair felt under and over the top of the pipes. Two central heating pipes then the hot and cold water.

 

[Alex Knight]

Just because its been done before doesn't mean it is the correct way, I would keep the cold away from all hot pipes as far as possible

 

[Best]

It might be possible to drill the joists very accurately and run copper through them. Need to be accurately lined up with a chalk line or laser & measured plumb down to centre exactly on each joist. Obviously any other pipes running parallel with joists are no problem. Holes need to be plenty big.
If it is a concrete block wall new build, then just a matter of drilling holes bigger than the pipes diameter & temporary sleeving to push the copper through. But you might find some rooms joists are running opposite direction to others & this will enable you to simply push copper pipes in from room that has joists running same way, through the other joists you drill, if you know what I mean. I have done some like this. Nothing is impossible.

 

[AWheating]

lets be honest if your on a price your going to have to cir saw a big notch and bang the pipework in. I would try and keep the cold closest the wall in its own notch if you can but its new build and the pay is peanuts so sometimes you give them a monkey.

 

[Best]

Pipes set 3 or 4 inches apart will not only prevent heat transfer, - they are also so handy to solder, they are also easier to bend pipes to tee into them.