ᐅ Installation of Additional Insulation for Underfloor Heating – Cables Laid on Structural Floor Slab
Created on: 26 Jan 2020 20:40
T
Tx-25
Hello,
We have reached the stage of insulating the underfloor heating. As far as I understood, we were supposed to install the insulation ourselves. However, the installer now says it was agreed that we would also provide the materials.
My questions are:
What materials do I need, or what do you recommend? Our floor construction thickness is 18 to 19 cm (7 to 7.5 inches) on the ground floor and 12 to 13 cm (5 to 5 inches) on the upper floor.
Does the insulation need to be two layers on the ground floor?
What do you think about Gefitas 300 as a vapor barrier? The problem is that the electrician has already run cables across the floor. How should we proceed? Simply lay the foil over the cables?
We have reached the stage of insulating the underfloor heating. As far as I understood, we were supposed to install the insulation ourselves. However, the installer now says it was agreed that we would also provide the materials.
My questions are:
What materials do I need, or what do you recommend? Our floor construction thickness is 18 to 19 cm (7 to 7.5 inches) on the ground floor and 12 to 13 cm (5 to 5 inches) on the upper floor.
Does the insulation need to be two layers on the ground floor?
What do you think about Gefitas 300 as a vapor barrier? The problem is that the electrician has already run cables across the floor. How should we proceed? Simply lay the foil over the cables?
Is it the same case with the water pipes?
For the pipes coming out of the wall, the connection pipes have already been laid on the floor as well. It was the same process with our new neighbor who is also currently building. The pipes are also fastened to the floor.
But regarding the drainage, it is correct that the plumber first installs the pipes, then the wall is plastered, and after that the insulation for the underfloor heating is laid, right?
Otherwise, the insulation would be completely ruined by the plasterers.
For the pipes coming out of the wall, the connection pipes have already been laid on the floor as well. It was the same process with our new neighbor who is also currently building. The pipes are also fastened to the floor.
But regarding the drainage, it is correct that the plumber first installs the pipes, then the wall is plastered, and after that the insulation for the underfloor heating is laid, right?
Otherwise, the insulation would be completely ruined by the plasterers.
Tx-25 schrieb:
Is it correct that the plumber first installs the pipes, then the wall is plastered, and only after that the insulation for the underfloor heating is laid? Yes, that sequence is correct—only the waterproofing needs to be done first.
You can use Gefitas 300, but it only adheres properly if you thoroughly clean the masonry barrier sheets beforehand.
Laying the sheets under the cables will be a hassle—no one seems to have thought beyond their own nose.
Lumpi_LE schrieb:
You can use the Gefitas 300, but it will only stick if you thoroughly clean the wall barrier sheets beforehand.
But then I would also need an additional adhesive tape to fix the membrane to the wall barrier sheet? The moisture barrier only has adhesive strips along the edges. The front edge won’t stick. I assume there is special tape made for this purpose?
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