Apologies for jumping on this thread, but i'm also looking at installing 110sqM of retrofit ufh. So far had quotes from nu-heat & wunda. From those that recommend Wunda, what floor covering have you used and was it retro fit boards? Was all set to go with Wunda until i read a few reviews where there was issues with tiling directly on top of the foil boards due to a reaction with the tile adhesive. Wunda do say it can be tiled on directly..
Or are there any other retro fit systems out there which peeps recommend?