Daylighting Calculation Service

HRS have a specialist team that will work alongside you to ensure you are aware of all the factors that everyone on the design and building team need to be aware of to ensure you achieve your required result.

How do you determine the effectiveness of natural light that is anticipated to penetrate a room?

Factors such as the size of the opening, reflectivity of surfaces and view of clear sky from a window are all taken in to account, as they affect the daylight factor (DF) for the room.

The target daylight factor will be building and room type dependant.

Did you know that daylighting calculations can be used to gain a BREEAM credit, and beneficial in achieving a Code for Sustainable Homes rating? HRS can put together the required reports to satisfy BREEAM, Code for Sustainable Homes and feasibility studies.


If HRS are working with you to achieve your Part L2 compliance (air tightness works), then some of the fundamentals will already be in place to assess the building’s design for natural daylight.

For more information on Daylighting Calculation and related services, please contact 0800 030 4391 / email: or click to go to the KNOWLEDGE Hub, where you will find a range of information including our BREEAM Daylighting Interactive Spreadsheet.

0800 030 4391

“Thank you for your help and patience getting us through this rather complex procedure.”
Cost Manager, Haden Freeman Ltd

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Need advice or a quotation give HRS a call on:
0800 030 4391 or email: