Add articles to your saved list and come back to them anytime. It's all very well for new homes to be sustainably correct. But how do you retrofit an old property? Karin Derkley finds out. It's hard ...

Rainwater on the roof usually flows into gutters and downpipes and into stormwater drains to become part of the wastewater system. But rainwater is ideal for watering gardens, flushing toilets and ...