This fixed-height door sill for outswing doors has a wood base with an aluminum slope, making it low-maintenance and without exposed wood. The high dam design restricts water intrusion by utilizing a V-shaped, Kerf-in Foam seal (see product specs) where the bottom of the door meets the threshold. This foam seal eliminates the need for door sweeps or door shoes. The aluminum slope provides superior stability and long-lasting reliability. The sloped aluminum extrusion is grooved to prevent slipping.