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What is the insulating value of plexiglass As in the R value of a house wall Or the U value of glass?
Wiki User
∙ 15y ago
see http://www.k-mac-plastics.net/data%20sheets/ATG-014S1.pdf i believe it is 1/3 for .325 inch thick
Wiki User
∙ 15y ago
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Steel reinforcement bars add stability to concrete walls Do they also enhance the insulating value of concrete?
Concrete does not have a very good insulating value, and neither does steel. The mixture of the two will add structural stability to what you are building, but it (commonly) will not enhance the concrete's insulating value.
Which material has the highest r value stucco pine board concrete or fiber glass insulation?
Fiberglass Insulation, R Value of 3.14. Pine board has an R Value of 1.74
What is strain rate sensitivity index?
The resistance to prevent necking during deformation of a material. it is generally denoted by 'm'. The m value lies between 0 to 1. m = 1 for glass. higher value of m higher the formation of superplasticity
Why is glazing done?
window double glazing is used to reduce noise from traffic and reduce heat absorbtion/dissipation since it uses a pocket of air between two plates of glass which increases it r value , since "still" air is a very good insulator glazing for glass/pottery is done to seal the surface of the item to preserve the underlaying design/colour
What is the tensile strength of glass fiber?
The compressive strength of bricks varies depending on the type of bricks and what they are used for. The compressive strength of conventional red bricks is 40 to 65 Kg/cm2. In comparison, flyash bricks have a compressive strength of 70 to 120 Kg/cm2.
What is the U value of plexiglass?
Glass has an R value of approximately 0.14 per inch thickness Celluloid (Lexan, Plexiglass?) has an R value of approximately 0.7 per inch thickness [source: http://www.bobvila.com/wwwboard/messages/37235.html] U value is the inverse of the R value. (U-value = 1/R-value) Using this equation and the values above, the the U value of plexiglass is approximately 1.4 per inch of thickness. The U-value of glass is 7.0 per inch of thickness. So, if these values are correct, then Plexiglas is approximately five times as resistant to heat transfer by conduction as glass. I have seen this conclusion elsewhere a long time ago, but I have also seen values for plexiglass on a plastics dealer's web site that said the R-values of glass and plexiglass were approximately equal. On another site, a value of 1.35 Btu*in/hr*ft^2*ºF [source: http://www.plasticsintl.com/sortable_materials.php?display=thermal&sort=thermal_conductivity] There are some values given in SI units on other sites, generally consistent with the values given above. Thermal conductivity of Acrylic sheet is listed as 0.2 (W·m−1·K−1) while glass is listed as having a range of values from 0.8 to 1.4, depending on the composition (0.8d−0.93e((96%SiO2)1.2-1.4g W-m−1·K−1) [http://en.wikipedia.org/wiki/List_of_thermal_conductivities] Again, then, the U value or thermal conductivity of plexiglass is given as between 1/4 and 1/7 that of glass. More authoritative information and further discussion of this question would be greatly appreciated.
Insulating materials are rated by their?
R-value
Steel reinforcement bars add stability to concrete walls Do they also enhance the insulating value of concrete?
Concrete does not have a very good insulating value, and neither does steel. The mixture of the two will add structural stability to what you are building, but it (commonly) will not enhance the concrete's insulating value.
Is Double Glazing a good insulator?
Yes, a double glazed window - two panes of glass with an airspace between them - will provide considerably higher insulating value than a single pane of glass. For even greater insulating value, the space between the panes can be filled with argon gas instead of air. Argon-filled windows, often called Low E windows will generally be more costly than regular air-filled windows. Ray
How double glazing is a good insulator?
The big insulating value of double glazing has to do with the space between the two panes of glass. If it's filled with air, that's good, because air is a poor conductor of heat. For even greater insulating value, the space between the panes can be filled with argon gas instead of air. Argon is an even worse conductor of heat than air is.
What is a value of one glass electric insulator?
What is the electric conductivity value for the glass
How does loft insulation save heat energy?
Heat always flows from a warm region to a cooler region. An uninsulated house loses heat at a faster rate during cold climates than an insulated one. Insulating a loft reduces the amount of heat loss from the roof by means of installing insulating materials such as fiberglass matting, which reduce the U-value of the loft. The U-value provides an indication of how much heat loss occurs from an area, the higher the U-value, the greater the heat loss.
What is the proper R value for insulating a crawl space in Delaware?
It's cold in Delaware, go for R-36.
What does the r in r-value mean?
The R-value of insulating material is an indication of its effectiveness in reducing heat flow through walls, floor, and ceiling of a structure.
How thick a concrete wall would be needed to give the same insulating value as 3 and a half inches of fiberglass?
Poured concrete has an R value of about 0.08/inch. Fiberglass batt has an R value of about 3.14/inch (blown fiberglass wall insulation is about 3.2/inch). From these values we can calculate that the equivalent insulating thickness of concrete would be about 3.5x3.14/0.08 = 137.4 inches. Note that concrete blocks have a somewhat better insulating value due to the incorporated air pockets. A 4" concrete block has an R value of about 0.2/inch An 8" concrete block has an R value of about 0.15/inch A 12" concrete block has an R value of about 0.1/inch
What is the value of antique red glass?
There is not a definitive value for antique red glass. There are not only differing prices for when the glass was created, but what shade of red they are, such as ruby or cranberry.
What is the refraction index of glass?
1.33 The IOR of 1.33 is the common value for water at 0°C, and to me is not the common accepted value for glass. That being said, there are many different types of glass, and they all vary in IOR. However a common standard value for glass is 1.5
