How can I determine the U-value of my glass?
First order approximation: R-1 (british units BTU/hr/sqft/DegF) per sheet of glass. So double pane is R2, triple pane R3. Second order approximation depends on the frame material, and to some degree on coatings, and gas fills, and years since the gas fill; also depends on your heating system, exterior wind exposure.
How can I determine the value of old glass?
You can narrow down the value of old glass by consulting experts and doing your own hands-on research. Check out a few volumes on collectible glassware from the library, or look them up online. Numerous books on the subject have been published, and they can be as generic or as specific as you like.
How to find out how much my crystal glassware is worth?
Check with crystal replacement sites or companies to establish the value of your crystal. Once you have identified the manufacturer or the pattern, you can check to see what it would cost for a replacement piece, which also lets you know the piece’s overall value.
What do you need to know about old glassware?
Learning about old glassware goes far beyond valuing it, however. In fact, oftentimes you have to figure out what type of glass you own before you can find the value. Take a look at these additional resources to learn more about your antique and collectible glass pieces.
How do you calculate the weight of glass?
To determine the weight in LBS.* just enter the glass type, dimensions, glass thickness and the span** between supports into the Weight Load Calculator and click on Calculate. 1. Select glass type
Check with crystal replacement sites or companies to establish the value of your crystal. Once you have identified the manufacturer or the pattern, you can check to see what it would cost for a replacement piece, which also lets you know the piece’s overall value.
How do you calculate the area of an oval glass?
The area of an oval glass can be calculated by thinking of the glass as a rectangle with half of a round glass on each end. Do the calculations for the rectangle and round parts and add them together. What are the decimal equivalents to the glass size in fractions?
How is the square footage of glass determined?
For square and rectangular glass, square footage is determined by multiplying the width x the length of the table and dividing the answer by 144. You will need two measurements of the glass.
