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Building elements

Infill wall

An infill wall is a non-load-bearing external wall fitted between the floor slabs or frame of a building, closing it in without carrying its structure.

Also known as infill panel, non-load-bearing external wall, curtain wall element, infill walling

In buildings with a concrete, steel or timber main frame, the structure carries the loads and the facade only has to keep out the weather, insulate and carry the windows. Infill walls do exactly that: they sit between the slabs, floor by floor, and are fixed back to the frame.

Timber-framed infill walls are widely used in multi-storey housing because they are light, well insulated and easy to prefabricate complete with windows and cladding. Installed from the outside, they close in each storey quickly.

Related terms
Wall panelA wall panel is a prefabricated section of wall: a timber or steel frame, often already fitted with sheathing, insulation, windows and services. It is built in a factory and assembled on site. Building envelopeThe building envelope is the physical barrier between inside and outside: the external walls, roof, lowest floor, windows and doors. Precast concretePrecast concrete is concrete cast into elements such as walls, slabs, beams and stairs in a factory, then transported and assembled on site.
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