How sunlight actually works around a house
The questions behind the tools, answered with numbers rather than folklore. Everything here is checkable — and every claim links back to something you can simulate yourself.
Is a north-facing garden really that bad?
A north-facing garden loses less than people assume, and loses it unevenly. The shadow arithmetic, a month-by-month table, and the five things that actually help.
Read →Which way does my room face?
Three ways to find a window's true bearing — phone, map, and the sun itself — plus what north, south, east and west each feel like to live with.
Read →Will solar panels work on my roof?
Why the optimum is a very flat peak, what east–west roofs really give up, and why one badly placed tree costs more than a bad bearing ever will.
Read →How sun position is calculated
Declination, hour angle, the equation of time and atmospheric refraction — and the four assumptions that survive even a perfect calculation.
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