Browse Forums Home Theatre & Automation Building Standards; Getting It Right! 1. optional, you can but normally just use the earth from the main switch board 2. should be enough but the distance determines voltage drop - sparky should work it… 1 28812 Standard uninsulated double brick has an R value of around 0.7. An insulated standard 90mm stud timber frame can have an R value of around 2.7. Even if you insulate a… 17 12040 Hi there, I'm a conplete newbie to this, but I'm looking to put a floor down in my 6x9m shed. It's currently sitting on a 100mm thick concrete perimeter (dirt floor… 0 6467 |