What Is the R-Value of a Hollow Metal Door?

The R-value measures a hollow metal door’s ability to resist heat transfer—the higher the R-value, the better the insulation. A high R-value means greater energy efficiency, while a low R-value indicates poor thermal resistance.

Why Does R-Value Matter for Hollow Metal Doors?

Exterior hollow metal doors with a high R-value help:

✔ Reduce energy costs by maintaining indoor temperatures

✔ Block heat in summer and retain warmth in winter

✔ Improve building efficiency compared to low-R-value doors

Doors and windows are critical for energy savings—choosing the right R-value can cut heating/cooling expenses.

What Affects the R-Value of Hollow Metal Doors?

Door Thickness – 1-3/4" doors have a higher R-value than 1-3/8" doors.

Core Type – Two main options:

Perlite Core (R-2.4 to R-2.8) – Best for exterior doors, superior insulation.

Honeycomb Cardboard Core (R-1.7 to R-1.9) – Lightweight, ideal for interior doors.

Upgrade to energy-efficient hollow metal doors Contact us today for the best commercial door solutions! You can reach us at 008619302124208 or [email protected].