Like Stanley Kubrick’s 2001, the sky’s the limit with Sunsquare’s latest offering to the rooflight world. As a space-saving alternative to other versions, it’s created its Aero Dual flat-roof skylight, whose two synchronised panels hinge open to 90˚ at the touch of a button, freeing up space in your roof garden that may be at a premium. The glass is laminated and seals are backed by a 25-year warranty. Units are, says the PR, the only flat-roof skylights to hold a BSI Kitemark, and offer accessories including an intelligent rain sensor or full weather sensor pack, which will close the windows automatically if it starts to rain or the wind gets up. They can be made to any specification and size up to 4.6m2 so allow for bespoke solutions. Which should all come in handy when you need to get the random monolith that just appeared on the roof down your spiral access staircase.