Hi fellas. The guy at local shop is saying that weber set is suitable for sticking 10mm thermal boards to concrete sub? Is he correct?Usually I use the SPF White, I'm just trying to reduce cost for customer as its a large area and need a fair few bags.Sean.

you can mate but i tend to use the rapid version.

I've used it loads of times and never had any problems

Why would you use white ???

"Usually I use the SPF White."

Why use white when grey is nomally cheaper

Apologies for late replies.That was an error. I usually use grey. My mistake.

Just another question.I'm about to tile this job in question, the boards and ufh are covered in weber flexi floor slc. Using 600 porcelain and usually use the SPF to fix, but it's like an oven in there and am wanting to use a slow set, to prevent constantly knocking small mixes.Has anyone used weber set before with a similar sub, or can anyone reccomend a suitable slow set?Original sub was concrete btw.Thanks.

weber.set SPF is a standard addy and will accommodate movement from ufh..