Hollow Metal Doors
Understanding Thermal Ratings in Hollow Metal Doors: R-Value & U Value
When thermal performance shows up in door specifications, you’ll often see…
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A40, A60, G90 Explained: Be Able To Explain It Like A Pro
Most professionals in the built environment have a general idea what…
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Hollow Metal Frame with a 4″ Head
When to Use a 4″ Head on Your Door Frame In…
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