ᐅ Installation of potable water pipes below or within underfloor heating systems

Hello,

The drinking water pipes are to be routed above the floor.
A simple question:
Should these be installed within the insulation on the raw subfloor, or within the underfloor heating/screed (above the studded panel)?

Construction layers: concrete, insulation boards, underfloor heating in studded panels, screed.

Good luck

The insulation is properly installed.

Why should it be in the screed?

As RotorMotor mentions, into the insulation.

There is no other way – hot water pipes must be very well insulated, so they won’t fit anywhere else anyway. On the other hand, you don’t want cold water pipes in the heated screed.

RotorMotor schrieb:

Why should it go into the screed?

The argument from the person who wants to place it in the screed is that it would be more accessible in case of need.

But I agree with you, it should be placed in the insulation.

Dachshund90 schrieb:

The argument from the person who wants to install it in the screed is that it would be more accessible in case of an emergency.

With that, the contractor would already be out of the running for the trade contract. If they’re suggesting something that flawed, I don’t want to imagine how they would actually carry it out.

By the way, how thick does the contractor say the screed should be? You always need a certain coverage over the pipes. That will be a very thick screed—if it’s even feasible.

If they place cold water pipes over the underfloor heating, the cold water will be significantly warmed in winter. On one hand, you won’t get truly cold water from the tap, and on the other hand, you risk promoting Legionella growth.

The more I write, the more it feels like a bus driver is at work here...