Wall Structure Stair Waterproofing Detail with Sarnafil Membrane

This wall structure design AutoCAD drawing presents a detailed stair and wall waterproofing section using Sarnafelt NWP and Sarnafil membrane systems. The drawing clearly illustrates adhered Sarnafelt NWP layers, adhered Sarnafil membrane, and Sarnafil black membrane applied with hot air welded joints. Step-by-step stair geometry is shown with accurate measurements, including 2-inch horizontal and vertical offsets at each stair edge, ensuring clarity in construction detailing. The drawing focuses on the interface between the concrete stair structure and the waterproofing layers to maintain continuity and prevent water penetration.

The wall structure design DWG file includes clean annotations highlighting hot air weld locations, feltback membrane placement, and membrane termination details along stair treads and risers. This wall structure design download file is suitable for professional use in AutoCAD and can be coordinated with Revit, 3d Max, and Google SketchUp for architectural and structural projects. The drawing is ideal for architects, civil engineers, interior designers, and builders who require reliable waterproofing stair and wall section references for commercial or residential construction. The file is prepared with precise line work and clear layer organization for easy editing and implementation.