Dwarslatten

Dwarslatten are horizontal wooden battens placed perpendicular to the main structural members in building construction. They create a supporting grid that provides a fixing surface for other layers, such as roofing tiles, exterior cladding, or plaster, and they help establish spacing and ventilation where needed.

In roofing, dwarslatten run across the rafters at regular intervals to support the tile or slate layers. They also create a ventilated cavity between the roof covering and the underlayment, which helps manage moisture. In wall and ceiling construction, they can be used as a backing framework for cladding, siding, or plaster, helping to distance the exterior or interior finish from the structural wall.

Materials and dimensions vary by region and application. They are typically made from softwood such as pine, spruce, or fir, and may be pressure-treated for exterior use. Cross-sections commonly range from roughly 25 to 50 millimeters in thickness and 25 to 60 millimeters in height, with spacing chosen to suit the type of tile, cladding, or plaster being used. Fastening is done with corrosion-resistant nails or screws, and care is taken to keep battens straight and true to avoid distortions in the finish layer.

Modern practice may also use metal battens or other support systems in some applications, but wooden dwarslatten remain a common, traditional solution for creating a stable, ventilated backing layer. Proper installation follows local building codes and manufacturer recommendations for the intended finish material.