Aluminum insulating foil for underfloor heating

Hello forum

I just wanted to quickly ask what experience you have had with the aluminum insulation films for underfloor heating. I have two alternatives:

- Cheap film with grid from the internet and

- Film with ribbon fabric from the installer, also with grid (costs almost twice as much as the one from the internet)

Basically: The film goes on 3 cm EPS. On top of that come 3mm wire meshes, on which the clips and finally the pipes are attached (so no "perforation" of the film). Therefore, the question for me is whether it is actually necessary to use film with ribbon fabric if the pipes are attached to the wire meshes. Furthermore, I would be interested to know how "sensitive" these cheap insulation films from the internet are. Do they tear with every careless step?

Best regards
Joho

Hello Joho,

before you bring in an "Internet slide," ask the installer whether he will still provide the corresponding warranty for the installation work when using it, because I find it hard to believe.

So the installer doesn't really care, since we are using the clip system with welded wire mesh. The screed layer also said that it doesn't matter as long as the foil is not perforated too often, and that is given, since we will not use the fastening with hooks, for example (i.e. hook fastening of the pipes through the foil into the EPS).