Facade detailing is the precise working out and drawing of all junctions and transitions in the facade so that it functions in a watertight, windtight and building-physics-correct way. On the construction drawing these details are drawn at a large scale (for example 1:5) so the builder knows exactly how the materials meet.
Application
A facade contains many vulnerable transitions where water and wind can enter. Key details include the junction of the window frame with the masonry or cladding, the sill under the window that drains rainwater outward, and the lintel above the opening. The roof edge, the connection to ground level and the expansion joints that absorb material movement are also carefully drawn. Water barriers (lead flashings or membranes) lead water out of the cavity to the outside.
Characteristics
Good facade detailing largely determines the durability and maintenance of a building. Mistakes lead to moisture problems, cold bridges, mould or wood rot. Points of attention are correct water drainage (always shedding outward), sufficient overlap of water-resistant layers, and accommodating movement through expansion joints. The detailing must comply with the applicable building regulations and suit the chosen structure and facade finish.
Related terms
- facade
- window frame
- sill
- expansion joint
- lead
- building regulations
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