It is almost a slam-dunk furshur that you’ve not seen anything like Before The Architect’s Dream Home Daylight System of Design as represented in part in this Residential Daylight Schedule implying daylight strategies and techniques

Before The Architect develops a Residential Daylight Schedule to address code and a whole lot more

Why?  Because as far as this dream home designer’s seen down all the years, home daylight is given little to no attention in home designing, except by the rare home light professional

The basis for a Daylight Schedule of home design is codified in this home designer’s opinion

	8% of a sleeping area’s surface area must be represented in “aggregate glazing area,” which term is not defined as far as this dream home designer can tell; therefore, let it mean translucent or transparent glaze and not muntins and sash and not ‘openable area’ and such  [Seems reasonable.]
	Better window manufacturers can make the extent of “aggregate glazing area” or its surrogate readily identifiable, e.g., Marvin’s “Lite” metric seems suitable

Home design policy and common sense: let the daylight in . . . with qualifications – maybe not too much, not too little, depends on where, depends on how, how about when, depends what it’s shining on, etc.

Home design code: IRC presents effectively and round-about that, at least in a sleeping room, “aggregate glazing area" should be not less than 8% of that room's floor surface area. (CABO’s tougher, fewer exceptions.) [Please note that this presentation has no direct connection with emergency egress.]

Home design practice: who knows; the author has had reactions from "exactly, right" to "not so important around here" to "what are you talking about" from building authorities having jurisdiction

To start, the term aggregate glazing area – otherwise undefined – is interpreted to mean translucent surface – glass, clear plastic, etc. and not associated frame, sash, muntins, trim, and the like….what Marvin Windows and Doors defines as “Lite", Pella as “Visible Glass", Loewen as "Exposed Glass Area," etc.  Note, please, that if some folks weren’t interested in these surface areas, the big players in windows wouldn’t have worked it out in print. Before The Architect is interested.

Defines the proportion of aggregate glazing area to interiors' surface area in each major space of a dream home, including habitable rooms, halls, walk-in closets, utility spaces for workshop and laundry and such, garage(s), etc.

Compares actual aggregate glazing area to calculated code target for each major space and presents the difference either in square feet or, increasingly likely, in percent of target – the latter seems easier to usefully understand

Comments selectively by suggestion, indication, and definition about daylight aspects of importance as dream home designers’ opinion warrant

Provides an opportunity to identify persistently darkish spaces or parts of spaces sufficiently distant from a natural home light source so as to be considered unlighted, or not penetrated, by a natural home light source, e.g., a space considerably back from the daylight from a covered porch, an exceptionally deep interior space

Daylight experts put definable limits on the extent of useful daylight that can penetrate a space or spaces, e.g., including but not limited to 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.53ff. While this aspect of daylight analysis can be judgmental, consideration of related adjustment to natural illumination is, in the author’s opinion, well worth the effort as a pre-emptive design alert to convenience and safety

Presents several bases of analysis –

	Of itself for natural home light, in the dream home’s compass orientation and, possibly, its adjustment. and in personal assessment of infiltration and adequacy in daylighted spaces
	Ventilation, particularly as an indicator in cross-venting of sleeping areas and longer occupied rooms plus sizing and siting both supplies and returns
	UV intrusion indicator of where it may be less welcome and its power may need to be diminished
	Natural heat-build indicator for HVAC professional attention and various dream home design means to lessen
	Daylight glare definition especially in areas, such as stairways, where glare could threaten safety
	Qualification for code-compliance of aggregate glazing area to space surface area in sleeping areas, notably more problematic in such spaces within story-and-a-half structures
	Suggestive guide to artificial home light throughout, particularly ambient home light and home light controls
	Definitive cross-check on window and door size and site in both elevation and plan view
	Excellent perspective on the consequences of exterior home design on interiors' functionality, occasionally leading to dream home design changes ranging from marginal to major
	Guide to increased layering in low-daylight spaces
	Guide to continuous service rating in no- and very low-daylight spaces
	Motivation in single-storied deep spaces with exterior covers to penetrate those covers with niches in the roof, sunscreen, skylight, clerestory, etc.
	Motivation in single-storied deep spaces with or without exterior covers to add clerestories and home light wells by way of dormers and other fenestration in dream home designing changes
	Motivation, particularly in story-and-a-half dream home design, to necessarily add dormers, skylights, skylight tubes, clerestories, and other fenestration in home designing changes
	Provides an excellent cross-check on window placement and identification
	Provides an excellent parallax view intellectually on interiors' home light
	Effects

Sufficiencies for safety
 

Sufficiencies for convenience
 

Potential dream home design opportunities
 

Potential dream home design concerns