Thermal insulation

[Guest]

I am wanting a warmer boat this winter and so want to add some thermal insulating sheets to the hull of my sailing yacht and some above the roof lining. Has anyone a suggestion as to suitable materials? I also understand a recent PBO article did someting similar. Can anyone tell me what material was used by the author?

Barry (yacht Mithril)

 

[ccscott49]

Pints of guiness and pork pies is what I used for my insulation layer!

 

[qsiv]

I believe they work best when consumed monhs if not years before needed - and then continue taking them until you onger need the insulation....

 

[ccscott49]

Well I'll be blowed! A wise man, on here of all places!! It takes years to build up a nice layer, of even thickness.

 

[toad]

6mm closed cell foam from Hawk House Marine 01329 668800 at £5.04 per sqm or the same stuff from camping shops 2ft by 6ft about £3 to£4 called carrymat i think.Used under sleeping bags,i got mine from a army surplus shop but only comes in green.

 

[mikewilkes]

Do you think this guy has been spying on our respective girths Colin??
Have a good Chrimble mate, maybe see you back threr in Jan.
Mike

 

[ccscott49]

Mike! Hows tricks! See you in Jan Merry christmas mate and a happy new year, I'll be back 27th, then off again on the 5th, but back around the 15th, we'll have a jar or two then!

 

[jeanette]

polystyrene is cheap, versatile and very flammable.
Steel boats often use rockwool
I recommend the camping mats (under carpet) for the floor, you can stick it down underneath the cabin sole if you want it to be permanent (assuming your bilges are dry).

What kind of heating system have you got?
Steel boats also use some kind of expanding spray-on foam - I don't where you would get this, but it will fill all the awkward corners and cavities.
Try metalboatsociety.com for some more informed advice on their forums.

Jeanette

 

[mikewilkes]

Bit confused by the dates but I will be there between about the 8th Jan and 24th. Thenits back to the grindstone in Sicily!!!!!!!!!!!!!!!!
Take care in the frozen north,
Mike

 

[ccscott49]

I will be there, from 27th dec till 5th jan, then over to norway as in town coord. Then back on about the 15th jan, so I'll see you then! My saloon woodwork should be done by then, if the quote isn't too high!! The wheelhouse is finished varnishing, so looks wonderful! I hope, it was coming on when I left!!

 

[charles_reed]

I used, very successfully, the thermal insulation material found in the DIY shelves, for putting behind central-heating radiators.

It's thin PU cell-foam bonded to a reflective aluminium backing and works as well as x5 thick polystyrene as well as taking up far less space.

A word of warning, it dislikes being bent round sharp corners.

I used it to stop condensation in the lockers under the side-decks, where there was plain matt-&-rovings, in external temperatures of -8C. The main deckheads had 30mm Corex, so that problem didn't exist anywhere else.

 

[Abigail]

Interested in this as we are embarking on insulating the hull of our GRP ketch.

Following earlier posts we have been investigating closed cell foam, and have found suppliers of the stuff used for sleeping mats, who can do us the 60m2 we estimate we need much more cheaply than in the shops. I'lll post the details when we've finally decided on the best deal we can find.

Which leaves me with the question of glue. What did you use and how well has it worked, to gluing to GRP?

Also, around the chain plates and the supports which are very well bolted to the bulwarks to well below the water line, I propose to velcros a layer rather than simply cover them over with insulation. I'm particualry concerned not to create an anaerobic little puddle for steel bolts to sit and rot in, and I want to inspect them. And this closed cell foam does not let water through! Does anyone have any thoughts on this point?

Ta

Sarah
s/v Roaring Girl

Sarah&Pip

 

[Maurice55]

If you want the best , you want spray-on foam, and I know somebody very good at it (forget about DIY, it's much too messy.
PM me if you want more info...Maurice.