Home » Home Improvement Tips » Home lighting design – Natural lighting design

Home lighting design – Natural lighting design

This article develops a unique and comprehensive daylighting design timeline for dealing with code and more. Home lighting design policy for most homes these days: let daylight in with qualifications – maybe not too much, not too little, it depends on where, how, how moment, what it shines on, etc. a daylighting design schedule.

Home Lighting Design Code: IRC 303.1 effectively and circularly presents that for daylighting design, at least in a bedroom, the “overall glazing area” should not be less than 8% of the floor space of that room. (ACAB is harder, fewer exceptions.) [Please note that this presentation has no direct connection with emergency egress.]

Home lighting design
Home lighting design

Home daylighting design practice? Who knows. The author has had reactions ranging from “exactly, right” to “not so important here” to “what are you talking about” from the relevant building authorities. If this is considered by others, it would only be for the sleeping areas, that’s what I expect.


To begin with, the term aggregated glazing area – otherwise undefined – is interpreted to mean a translucent surface – glass, clear plastic, etc. and not a frame, chassis, cross members, fittings, etc. associates. What Marvin Windows and Doors defines as “Lite”, Pella as “Visible Glass”, Loewen as “Exposed Glass Area”, etc.

Please note that if some people weren’t interested in these surfaces, the big Windows players wouldn’t do it in print. This custom home designer is interested.


A home lighting program, or lighting program, achieves four goals.

First, it defines the proportion of the aggregated glazing area to the interior area of ​​each main space in a residence, including living rooms, hallways, walk-in closets, utility spaces for the workshop and laundry room, and others, garages, etc.

Second, it compares the actual total glazing area to the calculated code target for each main space and shows the difference either in square feet of glazing area or, increasingly, as a percentage of the target glazing area – the latter seems easier to understand usefully.

Third, it comments selectively by suggestion, indication and definition on the important aspects of daylighting, as justified by the opinions of the designers.

Fourth, it offers the possibility of identifying spaces or parts of spaces that are always dark enough far from a of natural light to be considered as not illuminated, or not penetrated, by a of natural light, for example, a space. considerably removed from the daylight of a covered porch, an interior space of exceptional depth.

The structure of the appendix is ​​presented in the form of a table with several columns. From the left, let’s see: a given space; its area in square feet; 8% of this area in square feet; total glazed area of ​​this space in square feet (usually to one decimal place); the arithmetic and the percentage difference between the 8% and the aggregate glazing column; and comments, if any. Comments can include modulation, dark, code-compliant (for sleeping areas), etc.

Home lighting experts place definable limits on the extent of daylighting that can enter a space. These limits can be found, for example, in Lighting Design Basics by Mark Karlen and James Benya, John Wiley & Sons, Inc., 2004, p.34 and Interior Lighting For Designers 4th Edition by Gary Gordon, John Wiley & Sons, Inc ., 1957, p. 53 and following. While this aspect of daylight analysis of daylight penetration may be judgmental, the consideration of the adjustment associated with daylighting is, in the author’s opinion, worthwhile. , well the effort as an early warning design for convenience and safety.

The Home Daylighting Design Timeline has several bases or entries for home design analysis – 16 in all.

1. On its own for natural light, in the orientation of the home’s compass and, possibly, its adjustment and in the personal assessment of infiltration and adequacy in daylighted spaces.

2. Ventilation as a cross-check of quality control in cross-ventilation of sleeping areas and longer occupied rooms, as well as sizing and indicative location of supplies and returns.

3. UV intrusion indicator from where it can be determined as less welcome and its power reduced.

4. Natural heat indicator for the attention of HVAC professionals and various design ways to reduce.

5. Definition of daylight glare, especially in areas, such as stairs, where glare threatens safety.

6. Qualification for code compliance of the glazing surface aggregated to the surface of the space in sleeping areas, especially more problematic in these spaces within L2-storey structures and a half.

7. Suggestive guide to artificial lighting throughout, especially ambient lighting and lighting controls.

8. Definitive cross-checking of the size of windows and doors and of the site in elevation, plan view (s) and nomenclature of the windows (and, optionally, nomenclature of the doors).

9. Excellent perspective on the impact of exterior design on interior functionality, sometimes leading to design changes ranging from marginal to major.

10. Guide to increased layering in low light spaces.

11. Guide to the continuous service rating in spaces with little or very little light.

12. Guide to modify the dimensions of the windows.

13. Guide to modifying the location of the fenestration.

14. Motivation in deep single story spaces with exterior covers to penetrate these covers with niches in the roof, sunscreen, skylight, glade, etc.

15. Motivation in deep single story spaces with or without exterior coverings for the addition of glades and skylights through dormers and other window design modifications.

16. Motivation, especially in one-and-a-half storey designs, to necessarily add dormers, skylights, skylight tubes, clerics, skylights and other window design modifications.

Comment: Please note that the correction of major errors in the past few days to achieve convenient and safe sizing and location of windows, exterior door composition, light fixtures, and reflection and lighting characteristics. light absorption can be a repair expense and a significant physical inconvenience.

Related Posts