Steel hull isolation: alternatives to foam?

I don't give false information like you and your mates!

Don't know...because all megayachts are cheap and poorly insulated or all builders are idiots...? Why ask me, I thought you knew everything...

Armaflex is still a foam for insulating pipes and tanks, not whole boats. I think we proved it was you who had no idea... oh I forgot, you think you are the best at everything...

 

Spray can foam is far more open cell, and absorbs water far more easily than commercially applied spray foam. None the less, all foam should be kept out of the bilges so any moisture can drain out of it. They used to foam sein boats here right down to the centreline, with no provision for drainage, The water in the bilges would wick up and rust out the plate behind it. Had they left the bottom open for drainage, they wouldn't have had that problem.
Transport Canada doesn't give a rat's *** what maintenance problems their recommendations give you, or how much their demands cost you..
Commercial passengers vessels don't have shortage of heat for the cabin, and heat retention is not a priority for them. Full time live aboard boats have different priorities. Transport Canada won't pay your heating bills, nor the cost of following their recommendations.

 

Epoxy coating on steel

Brent,

Quite true...we have a huge AC unit and heat as well. I was wondering if you knew anything about CORTEN steel. I read that the surface rust on that type of steel can act as a protective barrier for the steel beneath it. Do you know if it has to be coated the same way as mild steel? The epoxy coating on it already, a Devoe Coatings Epoxy paint, didn't stick and I don't want to make the same mistake the previous owner did.

Any thoughts?

 

Concur, first, one has to separate the "el cheapo" stuff from professionally choosen and applied one. Then the correct application comes into the game, and probably makes a different picture.
Not changing the fact, that the **** burns like hell and kills the entire crew in a minute.

Some of the recently built vessels in the range above 80ft are built with completely insulated bilges, which can make sense when a Armaflex foam is applied. See the Dashew comment and experience on that. It is not only ONE property, it is the accumulated value of a material which makes us choose one or the other.

Ahh, please do´nt butcher me again on referring to Dashews

Amateurs like our cpt. littlebrain of course do´nt grasp that.

Regards
Richard

 

You are right, COR-TEN has some difficulties with accepting ep based primers, due to the "built in" weathering effect. But there are some ep based "tars" on the market addressing this problem quite well.
But then, I am building in wood ep mainly, there are others around here having the right product in mind.

Regards
Richard

 

off topic ?

Hi,

Post # 1 reads:

I understand this sentence to mean the person asking the question is looking for some material other than PU (Polyurethane) foam. Praising the merits of PU is a different topic, and if one wishes to discuss PU's merits my suggestion is to start a new thread on the forum. Taking threads off topic make finding good suggestions more difficult.

I think we can summarize and put this thread to rest.

-Armacell is the best alternative to PU.
-Armacell and PU have different properties that make them attractive to different users.


Cheers,
Mark

 

Spray foam is self extinguishing just like Armaflex which also absorbs water so you can't put it in the bilge, when are you the foam amateurs going to grasp that and start telling the truth?

 

Could you be more courteous, it will be nice. You never stop insulting people.
Spray foam is not automaticaly self extinguishing, insurance company have hard time with that. And you never put insolation in the bilge. You should know that too,
And the agravation for the plating wityh spray foam can be real. In my experience.
I don't think you are an expert at everything touching boat. Let me know if I am wrong, I will be interrested.
Please try to answer without barking if possible. Thank you
Daniel

 

I have to contradict here Daniel.

Steve Dashew did insulate the bilges too to get rid of any possible mold buildup. But they run a very dry ship already.
http://setsail.com/insulating-boat-hull/

Others followed

Regards
Richard

 

I will be courteous when everyone else is, it didn't get me anywhere when I was so what's to lose? Apex is the one always insulting people but doesn't like it back, poor boy.

The foam used in European barges is self extinguishing and there are no insurance issues, your information is wrong. If you could read English you would see I said you can't put insulation in a bilge, no point anyway. No I'm not an expert at everything, I only comment on subjects I have experience of but then neither is anyone else an expert on everything here but there are plenty who think they are and they don't like it when they don't get their own way and lie quite openly.

You have done enough barking yourself lately so what gives you any right to tell others? You and your German mates are the most offensive 'know it all' people I've ever come across on a forum and you won't change and I for one won't forget that and if anyone insults me I'll do the same back, fair enough? Now go off and see if you can get me removed, I think I might welcome it.

 

Captain don't be rude. It is not necessary. And please don't dream, I am here to stay.
That said, you are boring with your non end winning. Grow up and get on with your life.
And never name somebody by its nationality,

it is the first step to be racist.
Never ever do that again. I am dead serious.
Richard is my friend, I don't care about his nationality. If you care about it and has to name it he will make you a low life.
My nationality is US, yours in English, Brent is Canadian, Fanie is South African (I think) how cares about it?
This is the beauty of the forum. Can you gasp this concept?
Did I ever cross this line? no. You did.
Daniel

 

Don't tell me not to be rude when you can't hold your own tongue, who do you think you are? That's a bit rich calling me racist against a German lol! I'm quite entitled to refer to any nationality as you just did and for your information I am not a racist but you can't help but notice the arrogance sometimes. I don't take kindly to threats either, if you insult me I will insult you, do you understand that? There's no beauty in this forum, people like you see to that, after all your whinging and whining about someone, it's you that needs to grow up! Now get off your patronising high horse and try setting an example before criticising others because at the moment I have no respect for you or your opinion.

 

Why you insist to stay.
Masochist perhaps.
By the way cool of, be civilized, you are making a fool of yourself.
Daniel

 

I was once moored off a shipyard in Auckland which built tugs. I asked the foreman about corten. He said they tried it and it was a waste of time and money, and caused more problems than it solved. He said you couldn't get corten in round , angle, pipe, in fact you couldn't get it in anything but plate , so anything which was not corten was sacrificial to the corten, including the welds. He said they got far more distortion than with mild steel , and it was considerably more expensive. They went back to mild steel ,and lived happily ever after.

 

You can put the flame from a cutting torch on foam and it will go out, time and time again.. Then ,sometimes, the least little spark will set it burning like gasoline. It's extremely unpredictable as to when it will decide to burn like gasoline. Doesn't seem to have any logic, in this sense.
Friends had a major fire on one of my 36t footers in Frisco bay . She burned like gasoline, until the fire came to the part which was painted with cheap latex paint. There the fire went out , cold turkey, despite enough heat to make their loran and VHF into plastic stalactites.
Given that cheap latex is free at many recycling depots, and it only takes a couple of hours to paint your foam. it doesn't make any sense not to.