4specs.com    4specs.com Home Page

HM Doors - Polystyrene vs Polyurethan... Log Out | Topics | Search
Moderators | Register | Edit Profile

4specs Discussion Forum » Archive - Product Discussions #4 » HM Doors - Polystyrene vs Polyurethane core « Previous Next »

Author Message
(Unregistered Guest)
Unregistered guest
Posted on Monday, February 15, 2010 - 08:03 am:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

We typically do not specify a specific type of insulation, but just the required R-value for the door.

Topics | Last Day | Last Week | Tree View | Search | Help/Instructions | Program Credits Administration