Pipes in Kingspan

[verdigrey]

Hi Guys , Could do with advice please . We rarely do new build , but we have been asked to Quote for all Plumbing in a detached 3 bed house . U/F in screed ground floor and Rads on !st floor .
In Kitchen they want an Island Unit with Sink , so I need to get 2x15mm pipes to sink and 1 x 40mm waste pipe away . The floor is block and beam with 100mm kingspan and about 70mm sand and cement screed . Is it best to install pipes onto conc floor BEFORE the kinspan go,s down and let them fit around it . Or cut grooves into Kingspan after for pipes ??
Also same question for Cold and Hot services ? We will afterwards fit U/F pipes by staple into Kingspan . We have just got quotes for 2 different U/F systems . J/G plastic and Hetta type aluminium pipes . Hetta is about two thirds the price , is it true that the Aluminium pipes are easier to lay ??
Thanks

 

[ShaunCorbs]

thats only if there is joints in the wall/floor

"The pipework is laid as a continuous loop without joints; and
all connections are above floor level and accessible; and
all materials are suitable for such installations: copper pipework
would be required to be protected for example by means of a
plastic coating. "

 

[tamz]

Best practice is to use a manifold and separate PIP feeds to each appliance. Doesn't cost much more to do it right.

 

[verdigrey]

Thanks everyone for your helpfull info .