Glare-control: buildings with skylight

Daniela Corcuera

LEEDuser Basic Member

0 thumbs up

Project location :

Brazil

December 18, 2023

Hello!

I am analysing a warehouse building where the daylight is through skylight in a high ceiling.

The reference guide states "manual glare-control devices, such as blinds, are required for all regularly occupied spaces regardless of rhe outcome of the daylight analysis".

In this case, if it is not possible to include glare control devices, it means that I cannot meet this credit even if the ASE100,250 is less than 10%? Or I can justify the credit with a narrative explaining that blinds will not be implemented because the lighting will be through skylights and there is no glare discomfort according to the simulation?

Note: I am using the annual simulation (option 1) and the project is CS-v4.1.

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Thomas Lagarde

LEEDuser Basic Member

0 thumbs up

Thu, 05/23/2024 - 18:22

You didn't get any ASE (glare) with skylight, curious, they are prone to that side effect. Why couldn't you use sunshades, opaque surfaces or others to control glare on a skylight ?

Andrey Kuznetsov

ESG consultant, LEED AP BD+C

Self Employed

LEEDuser Basic Member

36 thumbs up

Thu, 05/30/2024 - 04:12

Glare-control even in such cases is just common sense - if there is opening that can provide direct sunlight - it would be glare issues. So yes - if it is not possible to include glare control devices, it means that your project cannot meet this credit. Maybe only in case when all such skylights are located at places that are shaded in any case during the day at any given day of the year and it (skylights) are not subject to secondary glare that reflects from facade/windows that can go through this skylights. In that case you can try to file a case and try to get from GBCI an exemption specific to your project.

Umesh Atre

Sustainability Lead

Parkhill

LEEDuser Basic Member

11 thumbs up

Mon, 06/03/2024 - 14:28

The original post seems to be a bit old, however just thought I would clarify that unless the skylights use transparent glazing, glare control should not be required. Diffused and translucent glazing systems do not require glare control per the LEED Reference Guide. Hoping this helps.

Daniela Corcuera

LEEDuser Basic Member

0 thumbs up

Tue, 06/04/2024 - 18:07

Thank you for the answers! Thomas, we got ASE (glare), but it was under 10%. The material used in the skylight was a prismatic diffuser polycarbonate sheet, so it does not require glare control according to the LEED Reference Guide, as mentioned by Umesh.