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but for example, kooltherm 107 (pitched roof insulation) is phenolic and comes in dimensions 2400 X 1200 X 120mm as does kooltherm 103, and these are the dimensions that I need. Also, on the seconds & co website, if you go to the kooltherm section, it states 'Boards may be Kooltherm or Koolduct'.

Did you know what you were getting when you bought or just risk it?

They said that they know what it is but they're not allowed to pass that information on. And as a customer, I can't request a certain type.

I did & they told me that they couldn't tell me the code so I wouldn't know if I was getting floor, wall or roof insulation.

Our concrete slab is down & I am looking at how best to insulate. I had planned to used 130mm regular PIR with UFH on top, covered by a 50mm liquid screed. However, after a lot of reading it seems that it would be better to be around the 200mm depth for PIR but we don't have the room for that now. Alternatively I could go for 120mm Kooltherm 103 but that is out of budget unless I can get it from Seconds & co. The issue I have is that they say they can't tell me what code the Kooltherm is so I won't know if it's the one designed for floor use. I've seen a few mention that they have bought from there so my question is, how do you get around that issue? If they were to send the variant for wall cavity, would you still use it for the floor & would the wrong variant still be better that regular PIR? Or is there is a way of telling which variant it is by the look or description? I see on their site that they offer no foil, foil & tissue surfaces, I think 103 has foil on both sides but not sure about the other variants. Any help would be appreciated.