What is the R-value of a typical wood door?

The R-value measures a material's ability to resist heat flow, with higher values indicating better insulating properties. A typical wood door generally has an R-value of about 2 to 5, depending on factors such as thickness and whether it has any insulation.

Choosing R-2 aligns with the characteristics of many standard wood doors, particularly those that are not specifically designed for energy savings and may lack additional insulating materials. While some wood doors may reach R-4 or higher when constructed with insulation or using thicker materials, a typical wood door, particularly a basic model, more frequently provides an R-value of around 2.

Understanding this context helps reinforce the importance of checking the specific construction and features of a door when assessing its thermal performance. In contrast, the higher R-values associated with other options represent either different types of doors or those augmented with insulation, which do not characterize the average wood door.