Insulated raft done

[kandgmitchell]

We used the left over 150mm rigid electrical duct Northern Power insisted we use for our power connection. Cut into short lengths and slid over the drainage connections. It was cut tight to the insulation and then the gap within the duct around the drain pipe sealed with foam.

[AartWessels]

Ohh, that's interesting, but I won't hijack this topic, thanks for the feedback 🙂

[Alan Ambrose]

150mm? Jeez.

 

>>> If I remember correctly it was the way the two materials behaved after they get very wet and how they dry out. It could have been propaganda from either side. Very hard to find honest brokers in materials science.

 

Yeah, I'll write up my research on this one day. Both sides, particularly the EPS guys, are quoting 'research' that is misleading.

 

I gave the casting vote to Glatthaar Keller, who use XPS.

[kandgmitchell]

We had 3 phase supply and the 150mm is what they wanted to the cabinet.

 

As far as I'm aware extruded polystyrene is very closed cell and doesn't absorb water whereas expanded does hence the drainage requirements for the latter. We used extruded and it certainly was waterproof.