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(Unregistered Guest) Unregistered guest
| Posted on Monday, February 15, 2010 - 08:03 am: | |
I work for d/f/h distributor. For years we have been pushing the polyurethane core hollow metal core doors because the core tested under ASTM C518 (calculated) had a R-value of 11 compared to the polystyrene door which had an R-Value of 6.4. Now Ceco is using another test, ASTM C1363 (Operable), which tests the door hanging in the frame, the polyurethane core door R-Value drops to 3.2 and the polystyrene core doors drops to R-2.8. A honeycomb door (uninsulated) has an R-Value of 1.9. The 3'x7' polyurethane door is about $100 more expensive than polystyrene? Which door would you specify? We are going to stop stocking the polyurethane and switch our stock over to polystyrene. |
Dave Metzger Senior Member Username: davemetzger
Post Number: 343 Registered: 07-2001
| Posted on Monday, February 15, 2010 - 11:21 am: | |
We typically do not specify a specific type of insulation, but just the required R-value for the door. |
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