Reveal cladding (also known as a dagstuk in Dutch construction) refers to the finishing material applied to the reveal, which is the inner surface of a wall opening where a window or door is installed.
Understanding the reveal
When a window or door is set into a wall, the thickness of the wall creates a recessed surface between the outer face of the wall and the frame. This recessed surface is called the reveal. It exists on the top (head), bottom (sill area), and both sides (jambs) of the opening. The reveal needs to be finished both for visual reasons and to protect against moisture and draughts.
Reveal cladding covers these surfaces with a clean, durable material. Common materials include timber boards, MDF, PVC profiles, plasterboard, or natural stone. The choice depends on the wall construction, the desired appearance, and the location (interior or exterior).
Why reveal cladding matters
Properly installed reveal cladding serves several functions. It conceals the gap between the window or door frame and the rough wall opening, provides a neat visual transition, and helps with thermal and moisture performance. Without adequate reveal finishing, cold bridges can form, condensation may develop, and the appearance of the opening looks unfinished.
On exterior reveals, cladding also protects the wall edges from rain penetration and weathering. Aluminium or zinc sheet is sometimes used for external reveal linings on rendered or clad facades.
Application
Reveal cladding is installed during the finishing phase of construction or renovation. In new builds, it is typically fitted after the windows are installed and the interior plastering is complete. During renovations, replacing old reveal cladding is a common step when upgrading windows, as modern frames are often slimmer than older ones, changing the reveal depth.
For insulated walls, insulated reveal linings help maintain the thermal envelope and prevent cold bridges around openings.
Related terms
- Window reveal
- Window sill
- Architrave
- Thermal bridge
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