What type of vapor diffusion retarders should be avoided on the interior side of basement finishes?

Low permeability vapor diffusion retarders should be avoided on the interior side of basement finishes because they can trap moisture within the assembly. In a basement, moisture levels can be higher due to ground water and humidity, and using low permeability barriers may prevent adequate moisture dissipation. This can result in mold growth, wood rot, and structural damage over time, as trapped moisture can cause deterioration of materials used in the finish.

On the other hand, high permeability vapor retarders allow more moisture to pass through, thus reducing the risk of condensation buildup within the walls. These are more suitable in environments like basements where balancing moisture movement is crucial. By allowing some moisture to escape, they help maintain a healthier indoor environment and protect the integrity of finishes applied in these areas.