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Old 10-14-2015, 04:43 PM   #169
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Lizard Skin thermal/ sound wrap is very good for lining your storage bays.
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Old 10-14-2015, 04:57 PM   #170
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This is one of those religious subjects, again. So I'll now voice a heresy that will get everyone shouting at me:

Has anyone tried styrofoam worms, or recycled styrofoam? Cheap or even free, fills nooks and crannies and odd shapes, but allows breathing and drying, is not at all hydroscopic, difficult for mice to nest in (they would fall though it or be constantly smothered in it, get PO'd and leave.... I'm speculating!). Water leaks will flow through it and (hopefully) out of a drain point. Can be membraned and taped to make almost free-standing structures. It would be necessary to seal up any gaps large enough for it to escape out of, but that wouldn't be a big problem. Not too fireproof, I'll admit.

Did I mention cheap or free?

I'd rather think about this than the None of the Above election campaign that we Canadians are suffering through at the moment.
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Old 10-14-2015, 05:51 PM   #171
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Styrofoam worms sandwiched between spray foam and Prodex. Mind blown!
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Old 10-15-2015, 10:23 AM   #172
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That looks like open cell foam in that floor framing. I would only use closed cell foam. And not in the floors. If you spill anything there has to be a way for water to get out. Additionally water can get splashed up from underneath. If this is open cell foam it will absorb water and gain weight.
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Old 11-11-2015, 11:48 AM   #173
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After researcing polyiso for the AS underside (where water can pool instead of being able to run down), I am beginning to rethink spray foam in favor of rigid foam (polyisocyanurate) for the entire build. For me, this actually has more to do with availability and convenience, though the performance also seems pretty similar. To do the spray foam I would need to rent equipment or hire someone. There is also the added mess of cutting back the spray foam once installed (my AS has no interior skins). Having to rent equipment means I cant do sections at a time (vs. the whole thing at once). I was having trouble finding polyiso, but my Home Depot actually has it under the name Rmax Thermasheath (NOT the pink Owens Corning stuff). They claim R6 for 1 inch thick and it's $16 for a 4x8 sheet. The biggest difference I see is the *seal* of the spray foam and the added structural integrity to the skins. I may do some research on sealing the interior of the exterior skin with some sort of spray, and then all the PIC panels get taped with foil.
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Old 11-11-2015, 12:41 PM   #174
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There are spray foam kits available with disposable sprayers ...
If ours ever gets gutted, foam everywhere.
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Old 11-11-2015, 12:57 PM   #175
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Quote:
Originally Posted by nrgtrakr View Post
There are spray foam kits available with disposable sprayers ...
If ours ever gets gutted, foam everywhere.
Airstream tried spray foam in some 1969 doors. They quickly discontinued it when they learned that it turned to powder.

Today, it's my understanding, that most spray foams when exposed to vibration, will indeed turn to powder, making it's application useless.

Dometic tried it in some reefer doors many years ago, and got the same results as Airstream did.

So, a word to the wise, make sure the foam spray you may use, will not turn to powder when subjected to vibration. Simply being in the walls of an Airstream, which when going down the road, is more than adequate vibration.

I, unfortunately, do not have a spray brand name that will not turn to powder, when subject to vibration.

If someone finds a brand that will not turn to powder, please post that information, as many others would like to use it as well.

Andy
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Old 11-11-2015, 01:37 PM   #176
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Tell me more about the kit and disposable sprayer.
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Old 11-11-2015, 01:45 PM   #177
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I thought about spray foam, too much trouble, and too much expense, for a little gain in my opinion.

My trailer does pretty well at holding heat with the old fashioned "pink stuff".


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Old 11-11-2015, 02:24 PM   #178
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Quote:
Originally Posted by nrgtrakr View Post
There are spray foam kits available with disposable sprayers ...
If ours ever gets gutted, foam everywhere.
This would be a much more helpful statement with information (any information at all) about these kits.

The only thing I could find was Tiger Foam. It's around $600 and I couldn't find information on how long I would be able to keep it.

After months of research, I see the merits of both Spray Foam and PIC (polyisocyanurate) panels. Foiled bubble wrap and fiberglass bat make no sense to me whatsoever.
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Old 11-11-2015, 02:33 PM   #179
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Quote:
Originally Posted by Inland RV Center, In View Post
Airstream tried spray foam in some 1969 doors. They quickly discontinued it when they learned that it turned to powder.
Are you suggesting that there have been NO improvements to spray foam in fifty years? That would be a sad state of affairs.

Quote:
Originally Posted by Inland RV Center, In View Post
Today, it's my understanding, that most spray foams when exposed to vibration, will indeed turn to powder, making it's application useless.
Most refrigerated trucks running on the roads today are created by injection spray foam. If it turned to dust, we wouldn't have food to eat.

Quote:
Originally Posted by Inland RV Center, In View Post
Dometic tried it in some reefer doors many years ago, and got the same results as Airstream did.
Again... "many years ago." Not to mention numerous people who have first hand experience and have stated over and over in these forums that their Argosies, etc. with spray foam were perfectly intact when the walls were opened.

Quote:
Originally Posted by Inland RV Center, In View Post
If someone finds a brand that will not turn to powder, please post that information, as many others would like to use it as well.
Agreed. I wish people would be a little more specific when posting and let us know exactly what kind of foam they are using (not just say: "I used spray foam!"). Again though, I think there are plenty of people that have posted about the spray foam in their 60's/70's campers who saw no sign of deterioration when they opened the walls.

All that said, I will reiterate the fact that I am changing my mind and switching from Foam Spray to rigid panels (specifically polyisocyanurate with foil facing on both sides), mostly because of availability (1 inch thick (R6) 4'x8' panels are $17 at Home Depot), ease of install, and the fact that I can do sections at a time (which helps with install time and cost of materials).
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Old 11-11-2015, 03:09 PM   #180
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Quote:
Originally Posted by Inland RV Center, In View Post
>>>>snip>>>>
Today, it's my understanding, that most spray foams when exposed to vibration, will indeed turn to powder, making it's application useless.

Dometic tried it in some reefer doors many years ago, and got the same results as Airstream did.<<<<snip<<<<<<

Andy
I recently bought a Dometic Brisk Air AC unit. It's ducts within the rooftop unit are primarily made from a formed/injected semi rigid foam insulation. Dometic has published some videos that demonstrate the advantages of using it. If I remember correctly, the terminology they used was "structural" foam.
I've also noticed this same type of foam being used for the spare tire carrier box inside a vehicle.
The same insulation type is used in the bumper of vehicles, between the metal and the plastic bumper cover.
I do not know what type of foam it is, but there is definitely a foam being used in the vehicle industry that does not turn to powder.
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Old 11-11-2015, 03:15 PM   #181
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Spray Foam Insulation

One thing that is seldom mentioned about spray foam.....

It burns quite aggressively.

https://foursevenfive.com/reason-foa...e-fire-hazard/


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Old 11-11-2015, 03:33 PM   #182
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Spray Foam Insulation

Tiger is one company with kits.
Pretty sure new spray foam in the USA has fire retardant added to it just like the rigid has, do a little checking.
There was a guy who insulated his AS with foam and posted pics elsewhere due to the controversy here about foam.
Some plain white boxes are made with foam, never heard of them having problems.
New refer trailers are foam, same.
The stuff has changed over the years.
Research more and see for yourselves.
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