Hi,
I am about to start my SIP panel garden room however, as I am building directly on top of a concrete slab i opted out having the SIP floor as I fall under the 2.5m rule.
The designers removed the SIP floor and replaced with a 47x100mm sole plate. I have been looking a little bit more into it and I have seen more convincing diagrams however using 22mm thick sole plates with the 75x47mm rail.
Concrete slab thick is approx 4in thick (so I have been told).
My question is other than gaining a little more internal height, it there any benefit using a 47mm over 22mm thick sole plate?