ᐅ Installation of Additional Insulation for Underfloor Heating – Cables Laid on Structural Floor Slab
Created on: 26 Jan 2020 20:40
T
Tx-25Hello,
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 the house built with a basement? If not, the bituminous membrane on the foundation slab as a moisture barrier is missing. On top of that, the cables, then the insulation material, followed by the heating pipes, and finally the screed, decoupled and floating with edge strips made of foam. Please clarify!
No, we do not have a basement. A moisture barrier is still to be installed. The electrician told me that I can/should lay the moisture barrier directly over the cables. Are there any advantages or disadvantages to this? I am planning to place the insulation against the cables and then apply loose-fill insulation over the cables and water pipes.
Tx-25 schrieb:
No, we don’t have a basement. A moisture barrier still needs to be installed. The electrician told me that I can/should just lay the moisture barrier over the cables.That’s quite unconventional and obviously it would make much more sense to place it under the cables...
It will never be properly sealed if it’s laid above the cables.
Well, I need to figure out how to proceed now. The cables are firmly nailed to the clamps. I’ll have to see how to remove them. Laying the membrane should, of course, be faster then, I think. I’m just wondering if anything would happen to the cables under the damp-proof membrane and if it’s correct to nail the cables back onto the damp-proof membrane afterward (with holes)?
Another question:
The membrane (Gefitas 300) is self-adhesive on the sides. But if I have to cut the membrane every 5 meters (16 feet), then at the beginning (at the cut edge) there is no adhesive, only on the sides. How do I bond it then?
Another question:
The membrane (Gefitas 300) is self-adhesive on the sides. But if I have to cut the membrane every 5 meters (16 feet), then at the beginning (at the cut edge) there is no adhesive, only on the sides. How do I bond it then?
Similar topics