WHAT ABOUT COSTS?

inside. For a low-maintenance choice, there is UPVC but it won’t offer the same slim framing as metal.

There are many options for the glazing, including double and triple glazed. It should be toughened or laminated to prevent shattering. Solar control glass can be used to cut down the sun’s glare, reducing heat and the risk of fading furniture. Remote control blinds can also help introduce shade.

Rooflights and lanterns can be non-opening or opening. Ones low enough in the pitched roof of a loft conversion can be operated by hand. Options for higher glazing include remote control, wall switch or smart control via a mobile or voice assistant. Sensors can monitor temperature, humidity and CO2 levels, or when it’s raining, automatically opening or closing if the weather takes a turn.

A simple flat glazed opening rooflight can cost less than £300, not including fitting, which would take around a day. For a medium-sized timber framed roof lantern, it will cost around £4,000 fully installed. A large bespoke roof lantern, however, could cost many thousands.