Look at the section on HVAC. But even their information seems to contradict themselves. If you do not use an air space you do not get much R-value.
They mention in one part of the FAQs that the Reflectix by itself with no air space it is R-1.1. But in the HVAC section they show R-values of R-4.2, 5.6, 6.0 and 8.0. The only difference seems to be the amount of air space you include in the installation.
But in the R-4.2 description I see no mention of using a air space. Just wrap the duct in the reflective material, as you described. They says this is R-4.2. But in the FAQ is says with no air space R-1.1. Perhaps I missed how 1.1 becomes 4.2 without mentioning a air space.
There are several other references to the need for a air space. Also if you Google reflective insulation and refer to air space you will find other places mentioning the need for air spaces.
But the RV manufacturers using reflective insulation do not seem to include it in their designs?
If looking for information about insulation you can frequently find many incorrect statements and claims about the types of insulation and the R-Values.
One I saw today was a video from a company called atticfoil.com. The head of the company is talking about their product and picks up a piece of foam insulation. It is pink and if you look quickly you can see some of the Formular brand marking of Owens Corning's extruded polystyrene. He says it is R-6. The manufacturer of Formular only claims R-5 per inch.
And then all of the incorrect names used. Calling every type of foam styrofoam. Referring to foam insulation as the blue stuff or the pink stuff. Saying you used Dow board insulation. Dow Chemical makes several kinds of foam insulation, including expanded polystyrene (EPS), extruded polystyrene (XPS), polyisocyanurate - polyiso. Which one are they talking about?
There are several other things I could say about the various types of insulation is anyone is interested.
This is the same information I have gathered .There are many misconceptions about the use and values of reflectix .
I agree with the many misconceptions. It is almost a buyer beware situation. It appears the end user wants a product to provide a given function, and the "experts" will swear it does. Just how do we know, just go with the belief system?
cm wrote: Thank you for posting the additional information for others to see. It is especially helpful to give the accurate specific product names and descriptions for others to use.
I did not mention the 100 psi which is also available in the Dow Styrofoam brand. The reason was that my source said it was not a stock item. Only special order and the minimum order was either 24 or 48 pieces. Also they only stocked the 2" size of 60 psi. To get the 3" would require the same minimum order size.
If you are using glue on polystyrene make sure you use a glue that is compatible. Some glues will dissolve the foam.
The availability issue is common unless you are near a large metropolitan area. Most lumber yards and home improvement centers carry the 25 psi version. To find the High Load version you will have to find a insulation distributor or commercial building material supplier.
Question. Has anyone insulated the base sidewalls of a truck camper? And any underside areas. I have seen some pictures of people insulating the inside of basement models of truck campers. Most campers seem to just use plywood for the bases without any insulation. Plywood is only R-1 or less.
One camper company told me you do not need insulation in the floor and the truck bed areas since hot air rises. My thinking is that if your feet are cold the rest of your body will feel cold. Using their logic if you built a refrigerator you would insulate the floor, cold air sinks, but you would not have to insulation the top of the refrigerator.
If anyone else has ideas or questions please post them. This information helps others.
my franklin had an insulated floor and wings i doubled it in the wings from 3/4 to 1 1/2in floor was 1 1/2 already and i plan to insulate the fridge cabinet to improve it's efficiency as for lifting the tc i was going to 2x2 and 1/4 plywwod with foam insulation coated with herciliner
* This post was
edited 03/07/12 06:21pm by recycler *
rehoppe wrote: ... That's why I come here and ask questions,,,, Even if I think I KNOW the answer. Often, that too is just a misallocated Belief, as well.
Well at least we know everything, and know what we are talking about. There are times though, I wish someone would start their post with "Once upon a time ...".
Look at the section on HVAC. But even their information seems to contradict themselves. If you do not use an air space you do not get much R-value.
They mention in one part of the FAQs that the Reflectix by itself with no air space it is R-1.1. But in the HVAC section they show R-values of R-4.2, 5.6, 6.0 and 8.0. The only difference seems to be the amount of air space you include in the installation.
But in the R-4.2 description I see no mention of using a air space. Just wrap the duct in the reflective material, as you described. They says this is R-4.2. But in the FAQ is says with no air space R-1.1. Perhaps I missed how 1.1 becomes 4.2 without mentioning a air space.
There are several other references to the need for a air space. Also if you Google reflective insulation and refer to air space you will find other places mentioning the need for air spaces.
But the RV manufacturers using reflective insulation do not seem to include it in their designs?
If looking for information about insulation you can frequently find many incorrect statements and claims about the types of insulation and the R-Values.
One I saw today was a video from a company called atticfoil.com. The head of the company is talking about their product and picks up a piece of foam insulation. It is pink and if you look quickly you can see some of the Formular brand marking of Owens Corning's extruded polystyrene. He says it is R-6. The manufacturer of Formular only claims R-5 per inch.
And then all of the incorrect names used. Calling every type of foam styrofoam. Referring to foam insulation as the blue stuff or the pink stuff. Saying you used Dow board insulation. Dow Chemical makes several kinds of foam insulation, including expanded polystyrene (EPS), extruded polystyrene (XPS), polyisocyanurate - polyiso. Which one are they talking about?
There are several other things I could say about the various types of insulation is anyone is interested.
This is the same information I have gathered .There are many misconceptions about the use and values of reflectix .
I agree with the many misconceptions. It is almost a buyer beware situation. It appears the end user wants a product to provide a given function, and the "experts" will swear it does. Just how do we know, just go with the belief system?
Wayne
Wayne, a lot of folks do just that. About a lot of things, with less than stellar results, I might add.
That's why I come here and ask questions,,,, Even if I think I KNOW the answer. Often, that too is just a misallocated Belief, as well.
Once upon a time______________
.
Now it's your job to finish the story!
Well, you asked!
Not a problem. Once upon a time, my TC was the best of the best. There was no experience other than my own. Folks posted their personal experiences on RV.Net, with links to support their experience and beliefs.
Once upon a time______________
.
Now it's your job to finish the story!
Well, you asked!
Not a problem. Once upon a time, my TC was the best of the best. There was no experience other than my own. Folks posted their personal experiences on RV.Net, with links to support their experience and beliefs.
Wayne
Nice story. And now you're a 'published' author. Soon you'll be rich and infamous.
So my buddy works for a company that deals with high density foam and can cut anything to any size using auto cad. He is going to make me some 4" thick pieces that will essentially be 8 feet long and 5 feet wide (but will cut them into quarter pieces so he can take them home in his car and be easy to deal with). He said they should withstand the abuse and weight no problem. They are construction grade quality. So that is how I will be dealing with my problem. I get them tomorrow or Saturday and will have the camper on for the season within a week of that. Can't wait. Just need to cut out where the wheel wells go and I'll be all set.
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There are times though, I wish someone would start their post with "Once upon a time ...". 
