Join Date: Jun 2007
Location: Puerto Vallarta Mexico
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It will be hard for us to have a 80 degree day here at the dock in San Diego. Could be at the height of summer. Could I guess try to heat up the boat. Also I would rather work with sheets of foam. Say ½ inch sheets. I am trying to find urethane sheets of foam. I guess I should have been more specific.
On the other hand I guess I could put a piece of say fiberglass on the side of the refer and then poor the foam into the space creating a layer. There are problems to this method as there is a lip for a shelf I want to preserve. It may work fine for adding to the bottom though. At any rate still sheets would work fine also.
I keep getting Polyurethane products.
Here is what I have found and am thinking even Home Depot may have what I am looking for. Problem is there is no one to ask that seems knowledgeable on the subject there.
Thanks for the compliment!
I have called a few lumber yards and manufactures and have yet to find the product.
“Polyurethane Insulation Materials
Polyurethane is a closed-cell foam insulation material that contains a low-conductivity gas (usually hydrochlorofluorocarbons or HCFC) in its cells. The high thermal resistance of the gas gives polyurethane insulation materials an R-value typically around R-7 to R-8 per inch.
Over time, the R-value of polyurethane insulation can drop as some of the low-conductivity gas escapes and air replaces it. This phenomenon is known as thermal drift. Experimental data indicates that most thermal drift occurs within the first two years after the insulation material is manufactured. The R-value then slowly decreases. For example, if the insulation has an initial R-value of R-9 per inch, it will probably eventually drop to R-7 per inch. The R-value then remains unchanged unless the foam is damaged.
Polyurethane insulation is available as a liquid sprayed foam and rigid foam board. It can also be made into laminated insulation panels with a variety of facings.”
“Polyurethane products are often called "urethanes". They should not be confused with the specific substance urethane, also known as ethyl carbamate. Polyurethanes are neither produced from ethyl carbamate, nor do they contain it.”
“It is important to note that urethane foam is most commonly used to refer to a material made from polyurethane. The urethane reference in this name is to the type of links, also known as carbamates, which join the units in polyurethane. There is some potential for confusion as the word urethane on its own is often used for a specific carbamate also titled ethyl carbamate. Despite the name, this substance does not appear in urethane foam.”
“Urethane foam can also be used for insulation. The biggest advantage of the substance for this use is that it has a very low lambda value, which is the measure of how much heat it transfers, meaning it is a very effective thermal insulator.”
“Strong and resilient, polyethylene foam is often sold as closed cell foam sheets. It is used as thermal insulation, as shock absorption, to dampen sound, and as cushioning. It is very buoyant and is frequently found in flotation devices and other nautical equipment.
Polystyrene, also called Styrofoam™, is a lightweight foam that is easy to work with. It is used in construction as insulation because of its almost complete resistance to moisture, water vapor, and mold. It is also a popular choice for arts and crafts and packing material.”