Hi all, I am putting down new laminate flooring (10mm thick) in my downstairs hallway and toilet, which the sub floor is concrete. I have been researching and i was about to buy Duralay Excel as has excellent reviews, until i saw these other two underlays. 1. Duralay Excel Tog 0.55 Thickness 3.6mm 2. Timbertech2 Acoustic Gold Plus Tog 0.7 Thickness 5.0mm 3. Cloud9 Cush'N'Wood Tog 1.0 Thinkness 4.0mm Sound proofing isn't as important, however all have 24 or more Can anyone give opinion on, i am more interested in reducing heat loss so reason why i am asking do i go for a higher tog. Thanks, Craig