Thanks for both replying.
freddiemercurystwin, wouldn't the number and size of holes I'd need to drill to allow sufficient ventilation in the steel make it weaker?
Tomfe, a solid floor was my plan as the the underfloor heating would be more efficient. However, after discussing this with a few...
I have a room I'm currently renovating which is approximately 3.5m sq. It is the latest room in the ongoing house remonstration, oops I meant renovation. It has a suspended timber floor with a void of 300mm from the top of the concrete oversite to the top of the joists.
- Here's the plan -
I'm...