Dachfirst

Dachfirst is a German term meaning the ridge or highest horizontal line of a pitched roof where two sloping roof surfaces meet. It commonly denotes both the structural element (ridge board or beam) that ties the roof framing together and the external capping or covering that protects the junction from weather.

Functionally, the Dachfirst provides structural alignment for rafters or trusses and forms a weatherproof seam at the roof apex. Exterior ridge coverings—ridge tiles, metal caps, or ridge ventilation systems—prevent water ingress, snow penetration and wind uplift. Many modern designs incorporate continuous ridge vents to allow passive attic ventilation while keeping the roof sealed against moisture.

Materials and forms vary by region and roof type. Traditional ridge solutions use clay or concrete ridge tiles mortared in place; contemporary systems may use mechanically fixed dry ridges, metal cappings, or interlocking units with breathable underlays. Decorative elements such as finials, weathervanes or ornate tile profiles are common in historical and vernacular architecture.

Maintenance typically focuses on checking mortar joints, fastenings, flashing and ventilation performance, and removing debris or nests that can obstruct airflow. Because the ridge is integral to roof structure and weatherproofing, significant repairs or alterations are usually undertaken by qualified roofers or carpenters to ensure structural safety and proper sealing.