Found a video where Tom installed composite decking and PVC boards over an existing cement pad/step. The video showed Tom intalling the pvc board as a trim for the steps but not attaching the composite deck boards.

The video is the following...

How to Deck Over a Concrete Stoop
with General contractor Tom Silva, This Old House television

Does anyone know if he attached the composite deck boards in the same manner? Isn't there issues with attaching the boards directly over top the cement?

Any ideas on how to attach composite or even cedar boards onto an existing cement pad?? I'd rather not change the height profile too much.