
When I bought my Victorian terraced cottage in 2014, it only had one bedroom, so I created a second bedroom in the loft. The project went well, and by spring 2015, I was enjoying extra space and beautiful views of the local heath and woodland from my bedroom windows.
Come summer, and my first heatwave up there, I soon realised the big mistake I'd made by installing two large rooflights on a southwest-facing roof. It was hot. Seriously, hot. I don’t sleep well at the best of times, but that summer was unbearable – and marred by insomnia.