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L10 Windows/ Rooflights/ Screens/ Louvres

GENERAL

110 EVIDENCE OF PERFORMANCE
• Certification: Provide independently certified evidence that all incorporated
components comply with specified performance requirements.

115 TIMBER PROCUREMENT
• Timber (including timber for wood based products): Obtained from well managed
forests and/ or plantations in accordance with:
- The laws governing forest management in the producer country or countries.
- International agreements such as the Convention on International Trade in
Endangered Species of wild fauna and flora (CITES).
• Documentation: Provide either:
- Documentary evidence (which has been or can be independently verified)
regarding the provenance of all timber supplied.
- Evidence that suppliers have adopted and are implementing a formal
environmental purchasing policy for timber and wood based products.

120 SITE DIMENSIONS
• Procedure: Before starting work on designated items take site dimensions, record
on shop drawings and use to ensure accurate fabrication.
• Designated items: site specific .

150 DAYLIGHT PERFORMANCE
• Daylight calculations: In accordance with BS 8206-2, CIBSE 'Lighting guide LG10'
and BRE 'Site layout guide'.
• BREEAM requirements:
- Submit: Daylight performance schedule and Design plans for each floor in the
building with each room/ area showing isolux contours indicating point daylight
factor values.
- Calculations showing: Average daylight factor expressed as a percentage for
each room/ area and Minimum point daylight factor expressed as a percentage
for each room/ area.

155 VIEW OUT
• Windows/ opening sizes and position: Design to meet BREEAM 'View out' criteria for
relevant building type.
• Submit design plan and elevation drawings showing the following:
- All BREEAM defined 'relevant areas' dependent on building type and room
depths.
- Actual or notional workstation/ desk layouts.
- Window/ open areas.
• Submit site plan showing: Building location and proximity to external obstructions.

160 POTENTIAL FOR NATURAL VENTILATION
• Submit design plan and elevation drawings, and calculations confirming the
following: Locations of openings and Types of windows/ ventilators and total
openable areas.

RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01