Do Tyvek® weather barriers have an R-value? No; however, properly installed Tyvek® weather barriers help protect against loss of R-value in insulation due to wind washing. Even at wind speeds of 5 mph, a wall without an air barrier retains less than 40% of its original installed R-values.

How much R-value does Tyvek add?

As shown in the chart, a home wrapped in DuPont™ Tyvek® will maintain 94% of its installed R-value, compared to only 37% for a home without Tyvek®.

Is Tyvek house wrap insulation?

A non-woven, breathable structure that stands apart from other types of house wraps, Tyvek® HomeWrap® promotes drying in wall systems and helps insulation perform closer to its R-value.