Heritage officers reject timber window specs all the time—and it’s usually for one of these 5 simple reasons. Learn what to avoid and how to get your designs approved on the first submission.

W20 has long been the go-to steel door profile in the UK—but times have changed. Discover how Janisol Slim 25 offers slimmer lines, better insulation, faster lead times, and a lower cost—making it the new standard for high-end projects in 2025.