Loft insulation for fridge insulation - stupid idea ?

[ghostlymoron]

I certainly wouldn't use fibre insulation on a boat. You are bound to get some odd fibres floating around which are skin irritating. Use polystyrene sheets. You can sometimes find re-packing materials at the rear of electrical stores if you're lucky. It can easily be glued so you don't have to have a huge sheet - lots of bits will do.

 

[macd]

Use polystyrene sheets. You can sometimes find re-packing materials at the rear of electrical stores if you're lucky. It can easily be glued so you don't have to have a huge sheet - lots of bits will do.

Polystyrene is a significantly poorer insulator than phenolic foams such Celotex. Less robust, too.

 

[Strolls]

The table in section 7, page 11, of this PDF provides some comparisons between aerogel, Celotex and polystyrene: http://www.swingcat.co.uk/what/fridge_freezer_calculations.pdf

 

[macd]

Thanks, Strolls. That link's a keeper.

 

[Hadenough]

I used both spray in foam from a company whose main business is insulated containers and refrigerated trucks. I also used the same foam in sheet form. I found the guy who fitted my stainless steel fridge box left a section out that caused the fridge to take too long to cool down. When I found the void the open section had been creating condensation. that was lying on top of some of the foam but did not soak into it so must be closed cell.. The void I did fill with spray in foam can from a local supplier and would stick to the stainless steel case and thus prevent condensation. The spray in foam uses moisture in the air to expand and set so any condensation around would help the foam to expand and set.

No it won't. It needs moisture, air and space. So if for instance the hole you are in injecting it in from is too small the foam, being in contact with all of those three will set ---- and prevent the rest of it in the void from doing anything but being gloop. I carried out extensive, expensive work shop tests to see if it was feasible but it ain't unless you can open up the void sufficiently with big holes or lots of closely spaced smaller holes to layer the injected foam.

 

[affinite]

Thanks, Strolls. That link's a keeper.

+1 thx