- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 10 Jun 2019
Louvre (or louver)
A louvre (pronounced ‘loover’) comprises narrow, sloping slats held in a frame and typically used to cover a vertical opening such as a window or an air vent. They provide screening and can also prevent access, shade from the sun and provide protection against wind and rain.
Louvres can be made of wood, glass and metal – particularly aluminium. In a window, the louvres may form part of a shutter (usually timber) applied either inside or outside of the window opening. The latter are very common in hot countries as they can allow air to circulate yet provide a degree of solar shading. They can also afford privacy to those on the inside.
Where the slats of a louvre are adjustable, it is termed a ‘jalousie’. A jalousie may form an entire window in which case it may comprise a series of adjustable, horizontal glass slats. In the UK however, it is more common to have a narrow jalousie of three or four louvres adjustable for ventilation above a much larger fixed pane of glass.
Internal louvred wooden shutters have become popular in the UK as they can form attractive architectural elements in their own right; they may incorporate adjustable slats, give excellent screening and provide an attractive alternative to the ubiquitous net curtain. they can also act as a light shelf, reflecting sunlight deep into a building's interior.
Aluminium louvred panels are sometimes fixed externally to building facades to reduce glare to the building occupants. Freestanding louvred screens may also be used to mask unsightly areas, such refuse storage areas, mechanical plant and so on.
 Related articles on Designing Buildings Wiki
- Bay window.
- BREEAM Visual comfort Glare control.
- Curtain wall systems.
- Custom made blinds for French, sliding and front doors.
- Daylight lighting systems.
- Fixtures in buildings.
- Solar shading.
- Types of window.
- Weather louvres can combat and complement the effects of climate change.
Featured articles and news
Consider a career in the electrotechnical industry.
Exploring local assets of community significance. Book review.
Wood-burning stoves should not be used in thatch-roofed buildings.
Servitisation, smart systems and connectivity.
What happens to the Construction Products Regulation if there is no Brexit deal.
The first step to long-term prosperity.
The status and rights of employees in construction
Continuing to share environmental best practice
The employee assistance programme EAP
HMRC's Construction Industry Scheme
What 'net-zero emissions' means for civil engineers