Seeking material for fridge insulation

[Cactus Sailing]

Indeed, and it can be confusing when someone recommends, say, 'Kingspan', which is scarcely more informative than 'Heinz'.
Of particular relevance to boats, you missed 'Jubilee' (who not only make clips of the type named generically, but many other types, too)

Put "Stanley knife", "hoover," into google and guess what comes up....Stanley knives & Hoovers... strangely enough the same with kingspan panels

very confusing. indeed...

 

[CJ13]

The Celotex type PIR insulation will absorb water over time which is unhygienic and the water reduces the insulation properties.
You need ‘Blue Board’ as recommended by Nigel Calder. We’ve been using it inside our fridge for the past 8 years and still good as new. I line it with foil wrap insulation ( the stuff you use behind radiators) which I replace every 2 or 3 years.

 

[macd]

Put "Stanley knife", "hoover," into google and guess what comes up....Stanley knives & Hoovers... strangely enough the same with kingspan panels
very confusing. indeed...

'Kingspan', as I'm sure you're aware, describes any product made by the Kingspan company (or the company itself), any of which will come up in a search. Since they are many and varied in their composition and purpose, it does not describe a product any more than does 'Heinz'. Some users may not much care which insulant they end up with, but others might.

 

[Daverw]

Uk building regs don’t normally apply to boats, bubble wrap stuffed into tight places does work and does not absorb water. Also very cheap. You can get it pushed into places you would otherwise leave unless rebuilding of course then you would use something more solid

 

[macd]

Uk building regs don’t normally apply to boats

Indeed they don't. But the reason bubble wrap-type insulation is not permitted for houses is that it doesn't work at all well, which may be of interest to people on here.

 

[Daverw]

Your correct irs not as good as many insulating panels but your not correct in that it does not work well. For a material readily available and used in thickness greater than insulating panels would be is a credible option for areas with a boat that we are talking about.

I’ve used it over the years on a number of projects none boat related and it’s had good results. The use as a commercial insulating material is fairly thing foil coated and as you say not very good but this is not the material I’ve used, just cheap layered bubble wrap. £5 will buy you a large roll to try

 

[Cactus Sailing]

Indeed they don't. But the reason bubble wrap-type insulation is not permitted for houses is that it doesn't work at all well, which may be of interest to people on here.

Incorrect, suggest you brush up on building regs before giving out advice on them, particularly Document B sections 2,3, & 4

air is an excellent insulator as it happens.

 

[macd]

Incorrect, suggest you brush up on building regs before giving out advice on them, particularly Document B sections 2,3, & 4

air is an excellent insulator as it happens.

I'm no builder, but my understanding is that foil-faced bubble wrap (such as Thermawrap) has since 2014 not been allowed for high temperature gradient installations such as ducting unless backed-up by an air-gap or other insulation. The giddy claims made by Thermawrap are premised on such an air-gap, although this isn't always apparent from their literature.

Please be clear that I'm far from suggesting that bubble-wrap does not insulate, just that there are better options at moderate cost for something the size of a boat fridge.

 

[Graham_Wright]

Go into your builders merchants and wander into the materials store. There are bound to be broken panels there and ask for an offcut. Celotex and Kingspan are not non flammable, they don't burn freely but they do give off noxious fumes. I stopped worrying about fire risk after looking at all the other more flammable materials in the typical boat.

 

[Hydrozoan]

I used a good thickness of Celotex panel when making a new box lid, covered internally with varnished ply; adequately hygienic IMO.

As the thread has moved on from lids, I will observe that for those with older boats not seeking the ultimate in insulation, ripping out much of a galley to fit panels, or resorting to uncontained particulates or expanding foams, can be unattractive as ways to deal with the spaces around a coolbox which are difficult of access. I used a couple of sections from a kit for insulating hot water tanks; they can be squeezed and pushed into awkward spaces, they contain the insulating material securely, they are inexpensive and they can be readily removed for cleaning or replacement.