Granite or basalt?
I have a front garden area that gets full morning sun until just after midday only, when it slowly covers with shade. For a re-design, part of this area is going to have either granite (pale yellowy grey) or basalt (very dark grey, almost black) setts. I'd prefer to get the basalt.
However, I've come across the idea that darker surfaces become hotter faster than paler ones, so would the basalt option make the temperature of this garden area hotter than the granite would? I'd be interested to hear people's opinions and insight into this.