[Rhodes22-list] ...ventilation [on spray foam and other musings].
Rhodes Net
bobandkathyr22 at bellsouth.net
Thu Feb 16 19:11:24 EST 2012
Kathy and I just came in from a four hour sail on the north fork of the St. Lucie River (like a good size lake). WX perfect. Had hoped to see the rocket launch; however, the shot was postponed at the last minute. A Navy communications satellite is payload.
Bob on the "NoKaOi 3 "
Sent from my iPhone
On Feb 16, 2012, at 7:01 PM, peter klappert <peterklappert at comcast.net> wrote:
>
> Chris--
>
> It was your solution--I just borrowed it. I'm in your debt--but then I'm in lots of debt thanks to Aeolia.
>
> Gorgeous sailing today on Tampa Bay. Too bad I was sailing to & from a marina for outboard repairs.
>
> P
>
> ----- Original Message -----
> From: "Michael D. Weisner" <mweisner at ebsmed.com>
> To: "The Rhodes 22 Email List" <rhodes22-list at rhodes22.org>
> Sent: Thursday, February 16, 2012 10:03:00 AM
> Subject: Re: [Rhodes22-list] ...ventilation [on spray foam and other musings].
>
> Chris,
>
> At least label it as a "groaner". Oy!
>
> Mike
> s/v Shanghai'd Summer ('81)
> Nissequogue River, NY
>
>
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Chris Geankoplis
> Sent: Thursday, February 16, 2012 9:53 AM
> To: 'The Rhodes 22 Email List'
> Subject: Re: [Rhodes22-list] ...ventilation [on spray foam and other
> musings].
>
> Gee Peter,
> I'm a real fan of your solutions!
>
> Chris
>
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of peter klappert
> Sent: Tuesday, February 14, 2012 9:33 PM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] ...ventilation [on spray foam and other
> musings].
>
>
> Another option is the Nicro day/Night solar fan. It can be mounted in the
> fore deck over the rode locker (where it also draws off moisture from the
> anchor rode). It's a compact & tidy addition on deck and doesn't get in the
> way when you're at the bow. Given the small volume of the R22 cabin and the
> amount of air that can come in even when the poptop is down & the companion
> way closed, the Nicro provides great air circulation. It moves a lot of air
> & runs around the clock because it has a rechargeable battery (which is
> supposed to last 2 years). I got the 4" rather than the 3". I owe the
> addition to Chris Cowie, who recommended it.
> The Airhead composting head uses a small fan to vent the compost; it
> draws very little. Still, were I doing it again I might also add the 3"
> Nicro there (on the cabin top).
> I had a boat cover made (eventually I'll post a few photos) & that would
> cover a 2nd Nicro. BUT: I had vinyl windows added to the cover so that the 2
> solar panels will function even when the boat is covered. I don't see why
> there couldn't also be some kind of window & vented area in the cover for a
> 2nd Nicro.
> Ventilation is especially important because I keep Aeolia is Florida
> where it gets hot & humid. I also added 2 circulating fans inside the cabin:
> one where the bulkhead meets the cabin wall on the port side, and one in the
> v-berth positioned so it can either push air into the berth area or flush
> air from the head. Neither draws much power.
>
>
>
> ----- Original Message -----
> From: R22RumRunner at aol.com
> To: rhodes22-list at rhodes22.org
> Sent: Tuesday, February 14, 2012 2:05:21 PM
> Subject: Re: [Rhodes22-list] ...on spray foam and other musings....
>
> The key to decreasing condensation on a R22 is air movement. I doubt that
> insulation would hold up very well in our small craft. Years ago I mounted a
>
> small 12v computer fan behind a stainless steel cowling on the hatch.
> Plugged into 12 volt and eliminated all the mold and mildew I had
> experienced
> previously. Much easier than insulation. There isn't enough exposed hull to
>
> make it practical in my opinion.
>
> Rummy
>
>
> In a message dated 2/14/2012 11:50:02 A.M. Eastern Standard Time,
> spreadgoodnews at gmail.com writes:
>
> To decrease interior condensation. Now that i think more about it
> tek-foil might be a better option.
>
>
>
> On Feb 14, 2012, at 9:29 AM, R22RumRunner at aol.com wrote:
>
>> Bob,
>> I'm just curious, why would you want to insulate the interior hull of a
>> R22?
>>
>> Rummy
>>
>>
>> In a message dated 2/14/2012 8:32:59 A.M. Eastern Standard Time,
>> spreadgoodnews at gmail.com writes:
>>
>> Thanks Rob. I am building out a 43' steel sailboat hull. I am
> finishing
>> the final interior epoxy coats now then i will spray closed cell
>> polyurethane foam all over the interior hull over the stringers and
> ribs. Then i
>> have read i should spray a fire retardant elastomeric paint over the
> foam to
>> resist ignition in case of an interior fire. This foam will insulate as
> well
>> as contribute to the oxygen barrier of the epoxy.
>> what kind of foam did boston whaler use in their hull construction? My
>> friend has a bw dinghy hull that weighs about 300 pounds! Thats like 20
>> gallons of absorbed water! My understanding of closed cell foam is
> that if it
>> is cut after spraying it will absorb some, but i am not sure how much.
> I
>> think the Rhodes has the good stuff in there like the foam that floats
>> docks.(closed cell polyurethane?)
>> Also is a pool noodle polyethelene foam? You can get that stuff in she
> ets
>> and it would be nice to insulate the rhodes interior hull with. It
> wont
>> absorb water either.
>> Thanks,
>> Bob
>>
>>
>>
>> On Feb 13, 2012, at 9:58 PM, Rob Granger <rgranger at sbc.edu> wrote:
>>
>>> Okay I didn't want to seem heavy handed when I stated before that I was
>>> "almost certain" that Great Stuff is closed cell because there is a
> lot
>> of
>>> controversy on this topic and to be fair, not all spray foams are the
>>> same... but I'm a chemist and I felt it was necessary that we get this
>>> straitened out since many of us are DIY boaters... so on the topic of
>>> spray foam
>>>
>>> Some spray foams are latex and therefore open celled (DO NOT USE LATEX
>>> SPRAY FOAM ON YOUR BOAT) but Great Stuff expanding spray foam is a
>>> polyurethane-based foam and not a latex foam. So unlike the latex
> spray
>>> foams it is *closed cell*. And you should not be afraid of it
> absorbing
>>> water. It will (however) stick to the hull like ... well a
> polyurethane
>>> glue (think Gorilla glue). So the bag idea is the way to go if you
> ever
>>> want to get it out again... or line the area with visqueen before you
>>> spray. I've used both approaches and they both work fine... I can
> post
>>> pictures if anyone wants to see the results of the bag or visqueen
>>> approach.
>>>
>>> So to clarify, polyurethane foam (Great Stuff) is *closed cell*... so
> it
>>> is fine to use on your boat, even in low spots.
>>>
>>> The pink and blue foam boards at Lowes and HomeDepo are also great to
> use
>>> for floatation foam. They are *extruded* polystyrene and so they will
>> not
>>> fall apart into tiny little balls that make a mess everywhere... (Iike
>>> cheap styrofoam will). I have about six 3" boards cut up and crammed
>> into
>>> my MacGregor 22'. And all of the little left over pieces are in a
> bag,
>>> crammed into a tight spot and filled with spray foam (along with some
>>> packing peanuts I got in Christmas boxes this year).
>>>
>>> A note on packing peanuts. They're now two kinds. The old-school
> kind
>> are
>>> made of styrofoam. Those are fine to use on a boat. The other type
> are
>> "*
>>> green*" and made of cellulose. The cellulose peanuts will dissolve in
>>> water. Obviously you do not want to use those. It is easy to tell
> which
>>> type you have. Drop one in a glass of water and wait a bit. Or you
> can
>>> bite one :-)
>>>
>>> If you are skeptical about the closed cell nature of Great Stuff
>> expanding
>>> foam...(and it is not a bad thing to be skeptical) you can read about
> it
>> on
>>> the Dow Chemical site... you wont hurt my feelings if you do... I
> promise
>>> :-)
>>>
>>> Here is the link to the Dow Chemical site
>>>
>>> http://building.dow.com/na/en/products/sealants/windowdoor.htm
>>>
>>>
>>> my 2 cents.
>>>
>>> ... the other Rob
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>>
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