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I assume you mean 2 inch thick foam sound board??? The answer lies in what type of foam specifically you are speaking of.Polyisocyanurate foam has an rvalue of approx. r-7 per inch,being one of the higher r value foams readily available in 4'x8' sheet size.Polystyrene foam board,commonly found in building centers and home centers,and commonly referred to as "Dow" board has an r value of approx. r-5 per inch.To calculate the 2" thickness you reference,simply double the r value given(r value is generally stated as "r value per inch".Thus ,2" polystyrene has an r value of r-10 (r-5/inch x 2).These are fairly general guidelines,and depending on your application,you may want to find more detailed specifications that speak to degradation of R value over time,properties and characteristics of various foam types,etc,etc.
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What is the difference between lvalue and rvalue?
A variable is a named storage that can hold any value and has 2 values associated with it namely rvalue and lvalue. 'rvalue' is its data value that is its content and "lvalue" is its location value, that is memory address.
How much force does it take to break a 2 by 4 foam board?
Not much. Studeis show that a 5 year old could break such a foam board in one shot taken in .48 seconds.
What is the best adhesive for foam core board - glueing 2 pieces to each other?
Contact cement should work well.ANS 2 -PL300 is the best choice.
What is effective sound proofing for basement ceiling that has one foot floor joists. How about blown insulation or 2" styro foam sheets?
Try a foaming machine. It sprays an dense foam between the walls
What is Lvalue in c?
An lvalue is an object that can be assigned a value, i.e. it can be on the left side of an equals sign, hence the term lvalue.If the compiler is complaining, you are probably trying to assign a new value to an rvalue, such as an array name or constant.
Which Fire Department has the best Foam truck crew in the US?
Foam 2 B-Shift
How does the copper backing plate provide dc power to the circuit board through the sandwiched foam?
I'm not at all sure what you are describing. If the "sandwiched foam" you mention is plastic foam between the circuit board and the copper plate then the copper plate has nothing at all to do with power, the copper plate is just a shield to prevent radiation and/or interference. This shield has one connection to ground and no other connections.Power is provided in a circuit board by internal traces and/or planes: digital ground, digital +V, analog ground, analog +V, analog -V. Sometimes boards use external power bars that are soldered to several pads on the board, each power bar has 2 or 3 conductors inside it and is semirigid. Power is not provided to a circuit board by an external copper plate.
Can you use a hot glue gun on fun foam?
of course you can !ANS 2 - I don't know what 'fun foam' is - but I DO know that hot glue melts many foam surfaces.
Average weight of a foam ball?
2 g
2-piece foam cable holder?
2 peice of foam & use to sandwich multiple different size cables ? jacketed cable PUE/PVC MATERIAL .
If your dog throw up white foam then sleeps is this ok?
maybe because my dog threw up white foam but he did not go to sleep he was crying there are 2 ways your dog can throw up white foam...#1because they did not eat anything and #2 because he ate 2 much
When constructing a new wall to optimize insulation value is it acceptable to install 2 inch foam board on the inside of the wall in addition to the fiberglass batts between studs?
2" of foam is not very vapor permeable, so from that point of view it makes sense to have it on the inside of walls in cold climates, and people did used to do this in the eighties, but all the current literature says that foam must be used on the outside, with a more permeable vapor barrier on the inside. See BUILDERS GUIDE TO COLD CLIMATES by Joseph Lstiburek.
