Exterior closures: windows, shutters, blinds and sunshades

Summary for decision-makers

Exterior closures: challenges for building performance and solar management

Exterior closures play a key role in controlling solar gain, improving energy efficiency, and enhancing building security, particularly in light of the increasing use of large glazed areas. Shutters, exterior blinds, adjustable sunshades, and metal curtains are the main solutions for limiting summer overheating, improving thermal insulation, and securing access points.

The sector is innovating with motorization, automation, and the use of high-performance materials such as aluminum. Architectural integration and connected management of this equipment are becoming strategic, particularly in projects with large glazed facades, to guarantee comfort and energy efficiency in all types of buildings.

Summary

Role of exterior closures in buildings
Equipment and technical solutions
Technologies, materials and performance
Applications in buildings
Innovations and developments in the sector
Link with the sector category

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The external closures They encompass all the devices installed on the facade to protect the openings of a building. They play an essential role in terms of security, sunscreen and thermal comfort management. Among the main equipment are shutters, exterior blinds, sunshades or metal curtains, used in homes as well as in commercial buildings.

Role of exterior closures in buildings

Exterior closures are an essential element of the building envelope, particularly in architectural projects incorporating large glazed surfaces.

Their first function concerns the solar energy managementBy limiting direct radiation onto the windows, they help reduce overheating and control the summer comfort, a major issue in contemporary buildings.

These devices also contribute to the energetic performance buildings. When closed, some systems reinforce the insulation of openings and limit heat loss, which can improve the overall thermal efficiency of the building.

Exterior closures also play an important role in security and access protection. Shutters, grilles, or metal curtains help secure openings and protect buildings against intrusions.

Finally, they contribute to the architectural quality of the facades. In many recent projects, solar protection systems are integrated into the very design of the architecture.

Equipment and technical solutions

The exterior closures sector includes several families of equipment designed to protect openings and manage sunlight on facades.

Shutters

Shutters are widely used in homes and residential buildings to protect windows and bay windows.

The main solutions are:

roller shutters
shutters
sliding shutters
folding shutters.

Motorized roller shutters have been particularly developed in new constructions and energy renovation projects.

Exterior blinds

Exterior blinds are designed to manage sunlight while maintaining visibility to the outside.

Among the most common solutions:

awnings
exterior vertical blinds
projection blinds
screen blinds.

These devices are often installed on facades heavily exposed to the sun or on large glazed surfaces.

Adjustable sunshades (BSO)

The adjustable sunshades (BSO) constitute a solar protection solution particularly suited to commercial buildings and contemporary architecture.

Composed of adjustable slats, they allow for precise control of light direction while limiting heat gain. External venetian blinds are now widely used in office buildings to improve occupant comfort while reducing air conditioning needs.

Metal curtains and grilles

Metal curtains and security grilles are mainly used for access protection in shops, car parks or industrial buildings.

They help to secure shop windows, entrance doors and logistics access points.

Door and window closures

The French doors and bay windows They occupy an increasingly important place in contemporary architecture, particularly in housing and commercial buildings. Their large glazed surface area, however, reinforces the challenges related to the solar energy management and thermal comfort.

Roller shutters are one of the most common solutions for equipping these openings. They improve thermal insulation and enhance access security.

Exterior vertical blinds or screen blinds are also used to protect large bay windows from solar radiation while preserving the view to the outside.

In some architectural projects, sliding panels or solar protection systems integrated into the facade complement the joinery and contribute to the aesthetic composition of the building.

These solutions become particularly important in buildings incorporating large glass facades, where controlling solar radiation is essential to guarantee indoor comfort.

Technologies, materials and performance

Exterior closures rely on different materials and technologies to improve the performance of openings.

Aluminium is widely used today for its strength, durability and long-term stability. It is notably used in many roller shutters, blinds and sunshades.

PVC is also used in some roller shutters for its thermal insulation properties. Wood remains the material of choice for traditional hinged shutters, particularly in detached houses.

La motorization and automation play an increasing role in the sector. Exterior closures can now be controlled automatically based on sunlight, temperature or the presence of occupants.

The desired performance levels include, in particular:

solar energy management
improving summer comfort
thermal insulation of openings
the durability of materials
access security.

Applications in buildings

Exterior closures are present in all building types.

In individual housing, they are mainly used to equip windows and French doors in order to improve insulation and solar protection.

In collective housing, they contribute to the energy performance of dwellings and to the management of sunlight on facades.

Commercial buildings make extensive use of Exterior blinds and shutters to control solar gain on glazed facades and improve the comfort of workspaces.

In shops and industrial buildings, metal curtains provide protection for shop windows and access points.

Innovations and developments in the sector

The exterior closures sector is evolving rapidly under the influence of requirements related to energy performance and building architecture.

The development of largely glazed facades reinforces the importance of exterior sun protection to limit overheating and improve summer comfort.

Motorized and connected systems now allow for automated management of shutters, blinds, or external venetian blinds. These devices can be integrated into building management systems to optimize natural lighting and heat gain.

Manufacturers are also developing more efficient solutions in terms of material durability and architectural integration.

Link with the sector category

Exterior closures fall into the category Exterior wood furnishings, which brings together all the solutions related to the openings and facades of the building.

This category includes windows, doors, bay windows, glazing, and solar protection devices. Exterior closures complement these features by improving light management, thermal protection, and access security.

In a context marked by the evolution of facades and the increase in glazed surfaces, exterior closures now occupy a strategic place in building design. They contribute to energy performance, occupant comfort, and the control of solar gain in contemporary buildings.