Hi Jacob - Thanks. This helps already but I am still not 100% clear. Noted your point about the PowerPoint - ie to trimmer around so that the earth wo ...

Thanks, Mitchell. It all makes sense. Rather than sleepers, can I use joists that are 140 x 45 cm? Thanks

Thanks Mitchell.This is much appreciated. Can I just clarify:- What you mean exactly with “The joists could be more sleepers every 300mm across the wi ...