I knowFig 2 is not correct Masona:
Okay, I think I got what you mean, I understand the wood-engineered have less expansion than the non-wood laminated type therefore you can pin the beading to the wood-engineered and because of the good quality of the wood-engineered and the weight of it, therefore you don't get a rush of air squashing out underneath to the edge of the flooring(?) Sorry for me being a bit thick sometimethe pin is not supposed to go into the concrete but into the beading where it sits on the wooden floor. And yes, when your whole floor moves, the beading moves with it but because you are using a tiny pin it does not restrict to movement which will happen using method of fig 1 (in extreme cases, but then again using our method will also only show in extreme cases, as said before, we recommend wood-engineered in conservatories and these types of floors have the benefit of being very, very stable.