We spend more time in our workplace than we do outside, on a daily and annual basis. That’s why people like to have an idea of daily rhythm and weather changes in their workspace. Daylight in the workspace simply causes a better working climate, less absenteeism and better results. This goes for both offices and warehouses. The downsides of large glass surfaces are also known: much more heat loss in winter and much more demand for cooling in summer.
For offices, showrooms and similar spaces it’s important to take orientation of glass walls relative to sun into account immediately from the beginning of the design. Glass on the south side preferably provided with sun screens and/or large roof overhang. For glass on the east and west sides overhang isn’t very useful but outside sunscreens are preferred. Glass on the north side brings a relative high amount of energy loss in winter (no solar gains), but obviously doesn’t require sun protection.
H. Hardeman BV applies standers HR++ glazing or triple glazed windows in her company buildings which leaves energy losses limited. Highly insulated glass can condense on outside in the morning, this is a sign that the glass is well insulated, which leaves the outer side of the window cold.
Daylight in industrial buildings is mostly let in through the roof since the buildings are usually quite deep so the workspaces are far from the walls. The best way to let in light is through daylight tunnels; theses have very high light yield compared to their surface, usually only 0.5 to 1.0% of floorspace is needed as daylight tunnel to let in sufficient light. The fact that out roof and wall panels are white, and therefore very reflective contribute to this as well. With traditional roof lights around 5% is needed which causes much more heat and cold losses. However, the initial costs of the traditional roof lights is much lower, so for buildings which only need limited heating and can withstand higher temperatures in summer these can be a good and cheap alternative for the tunnels.
In the added document Polycarbonaat lichtstraten (Dutch) you will find more information regarding the possibilities around insulation values, heat entry and others regarding the roof lights.
We’d love to make an indicative calculation of the price for both alternatives, so you can make a well-founded decision.