BREEAM Visual comfort Glare control
To ensure occupant controls are considered at the design stage to ensure best practice in visual performance and comfort for building occupants. This involves reducing glare that can cause discomfort and distraction, and enabling occupant lighting control.
 When to consider
Incorporating glare control at an early stage allows designers to propose building integrated options such as brise soleil or other innovative options, whereas if it is left to the end, blinds may be the only option.
 Step-by-step guidance
Confirm with the design team which glare control method will be applied. Blinds are the simplest form of glare control. Where other methods are adopted, design data must be used to demonstrate compliance.
 Questions to ask while seeking compliance
- Building integrated measures.
- Occupant-controlled devices such as blinds (where transmittance value is <0.1 (10%)).
- Bioclimatic design.
- External shading or brise soleil.
- BREEAM Manual.
- Solar glare control | WELL Standard.
- LG9: Lighting Guide 9 - CIBSE.
- BREEAM Knowledge Base.
- BREEAM Extranet.
 Tips and best practice
Is it too late to amend the design to improve shading control (e.g. by using over-hangs)?
Automatic controls may provide compliance, but are not essential to comply with the requirements.
There are many means of controlling glare, such as blinds, brise soleil, building overhangs and even natural protection for some schemes. Keep an open mind about the potential solutions, where possible.
 Typical evidence
- Design drawings identifying relevant building areas, windows and any glare control such as the blinds specified.
- Specification of glare control system such as occupant controlled blinds (confirming transmittance value of <0.1).
- Drawings showing building integrated measures where applicable, such as the extent and height of eaves in relation to windows and building orientation.
- Drawings/specification of any external shading systems or brise soleil.
- Where fixed systems are used then design studies/calculations must demonstrate that sunlight will be prevented from reaching building occupants during occupied hours.
- The simplest form of glare control is occupant controlled blinds.
- As-built drawings/specifications for any glare control system - for blinds this could be manufacturer's literature confirming the transmittance value.
- Assessor site inspection photos and report.
 Applicable Schemes
The guidelines collated in this ISD aim to support sustainable best practice in the topic described. This issue may apply in multiple BREEAM schemes covering different stages in the life of a building, different building types and different year versions. Some content may be generic but scheme nuances should also be taken into account. Refer to the comments below and related articles to this one to understand these nuances. See this document for further guidelines.
- BREEAM International New Construction 2016
- BREEAM UK NC 2011
- BREEAM UK NC 2014
- BREEAM UK NC 2018
- BREEAM RFO 2014
This article created originally in a BREEAM workshop by Pantelis Levantis, Azita Dezfouli, Tom Abbott, Jane Morning, Martin Earl, Eleni Kalyva
--Multiple Author Article 21:54, 21 Apr 2018 (BST)
 Related articles on Designing Buildings Wiki.
- BREEAM Internal and external lighting.
- BREEAM Reduction of night time light pollution.
- BREEAM Visual comfort Daylighting.
- BREEAM Visual comfort View out.
- Daylight benefits in healthcare buildings.
- Daylight lighting systems.
- Exterior shutters.
- Fabric structures.
- Human-centric lighting.
- Louvre (or louver).
- Retrofitting solar shading.
- Solar gain.
- Solar shading of buildings BR 364.
- Solar shading.
- When hospital buildings aren’t healthy.
Issue support documents
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Issue support documents are written for named BREEAM Issues or sub-issues. More info. (ac) = awaiting content.
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- BREEAM Sustainability champion
- BREEAM Environmental management
- BREEAM Considerate construction
- BREEAM Monitoring of construction site impacts
- BREEAM Aftercare support
- BREEAM Seasonal commissioning
- BREEAM Testing and inspecting building fabric
- BREEAM Life cycle cost and service life planning
- BREEAM Stakeholder consultation (ac)
- BREEAM Commissioning (ac)
- BREEAM Handover (ac)
- BREEAM Inclusive and accessible design (ac)
- BREEAM Post occupancy evaluation
 Health and Wellbeing
- BREEAM Visual comfort Daylighting (partly ac)
- BREEAM Visual comfort View out
- BREEAM Visual comfort Glare control
- BREEAM Indoor air quality plan
- BREEAM Indoor air quality Ventilation
- BREEAM Thermal comfort
- BREEAM Internal and external lighting (ac)
- BREEAM Indoor pollutants VOCs (ac)
- BREEAM Potential for natural ventilation (ac)
- BREEAM Safe containment in laboratories (ac)
- BREEAM Acoustic performance
- BREEAM Safety and security (ac)
- BREEAM Reduction of energy use and carbon emissions
- BREEAM Energy monitoring
- BREEAM External lighting
- BREEAM Low carbon design
- BREEAM Passive design
- BREEAM Free cooling
- BREEAM LZC technologies
- BREEAM Energy efficient cold storage (partly ac)
- BREEAM Energy efficient transportation systems
- BREEAM Energy efficient laboratory systems
- BREEAM Energy efficient equipment (partly ac)
- BREEAM Drying space
- BREEAM Transport assessment and travel plan
- BREEAM Public transport accessibility
- BREEAM Sustainable transport measures
- BREEAM Proximity to amenities
- BREEAM Cyclist facilities
- BREEAM Alternative modes of transport (ac)
- BREEAM Maximum car parking capacity
- BREEAM Travel plan
- BREEAM Home office (ac)
- BREEAM Water consumption
- BREEAM Water efficient equipment
- BREEAM Water monitoring
- BREEAM Water leak detection (ac)
- BREEAM Hard landscaping and boundary protection
- BREEAM Responsible sourcing of materials
- BREEAM Insulation
- BREEAM Designing for durability and resilience
- BREEAM Life cycle impacts
- BREEAM Material efficiency (ac)
- BREEAM Construction waste management
- BREEAM Recycled aggregates
- BREEAM Speculative floor & ceiling finishes
- BREEAM Adaptation to climate change
- BREEAM Operational waste
- BREEAM Functional adaptability (ac)
 Land Use and Ecology
- BREEAM Site Selection
- BREEAM Ecological value of site
- BREEAM Protection of ecological features
- BREEAM Minimising impact on existing site ecology
- BREEAM Enhancing site ecology
- BREEAM Long term impact on biodiversity (ac)
- BREEAM Impact of refrigerants
- BREEAM NOx emissions
- BREEAM Flood risk management (ac)
- BREEAM Surface water run-off (ac)
- BREEAM Reduction of night time light pollution (partly ac)
- BREEAM Reduction of noise pollution
Once an ISD has been initially created the '(ac)' marker can be removed
This particular index is based around the structure of the New Construction and RFO schemes.