Roof windows usually come down to three calls: fixed or openable, manual or electric, and centre pivot or top hung. Centre pivot suits most straightforward loft jobs because it’s easier to work with in tighter spaces. Top hung gives a different opening action when access and sightline matter more. Electric roof windows make sense where reach is awkward, but they add cost and another thing to spec. If you’re matching an existing opening, frame size and pitch matter more than the label on the box.
Viva SKYLO Spares Service Pack SKY100
Service pack for Viva SKYLO roof window SKY100
Fakro Roof Window UPVC PTP-V P2 - 55cm x 78cm White
White uPVC roof window, 55mm x 78mm
Velux Solar Centre Pivot Roof Window GGU SK06 - 1140mm x 1178mm White
Solar powered roof window 1140x1178mm, white, with rain sensor.
Velux Top Hung Window - 940mm x 980mm White Painted
White painted top-hung roof window 940x980mm with laminated safety glazing
Velux Centre Pivot Window - 940mm x 980mm White Painted
Velux centre-pivot roof window 940x980mm, white, U-value 1.3.
Fakro Centre Pivot Window - 550mm x 780mm White Painted
Fakro centre pivot roof window, 550mm x 780mm, white painted
Velux Window GGL FK06 2070 - 660mm x 1180mm White
White-painted roof window 660x1180mm with top control and ventilation
Velux GGL Centre-Pivot Roof Window - 942mm x 1178mm White painted
White painted centre-pivot roof window, 942mm x 1178mm, U-value 1.3
Velux Centre-Pivot Roof Window White Polyurethane - 550mm x 778mm
Maintenance-free white polyurethane centre-pivot roof window
Velux Window GGL MK06 2070 - 780mm x 1180mm White
Velux window GGL MK06 2070, 780mm x 1180mm, white
Start with the space you’ve got and how the room will be used, then the choice gets a lot easier. On a tight pitch or where access is awkward, the simplest option usually wins because it keeps handling and opening straightforward. If the opening will be used often, electric roof windows can save hassle, but they add cost and another thing to go wrong. If it’s mainly about daylight, a manual unit is usually the cleaner buy. Finish and accessories come after that. The wrong layout choice causes most grief, not the trim.
For most jobs, it comes down to how the unit opens and how much room you have around it. Centre pivot roof windows suit straightforward installs where you want easy handling and less clearance to manage. Top hung roof windows work better when you need the sash to project out and leave the opening clear.
Rooflights are the broader choice when the brief is about daylight rather than a named system. Trade roof windows make sense when you are balancing cost, handling and repeat use. If you are comparing ranges, check the rest of Windows & Window Fittings so you do not end up with a layout that fights the job.
The first call is how the unit will be used day to day. Manual roof windows keep cost and maintenance down where access is straightforward. Electric roof windows make more sense once the opening is awkward, or the client wants regular ventilation without a pole.
Opening style matters too. Centre pivot roof windows suit a simple, reliable fit. Top hung roof windows give a clearer opening, but they take more room. If the spec is mainly about daylight, rooflights are often enough. If glare control matters, Blinds are the next thing to sort. For exposed or temporary work, Glazing Sheets can be the better call where a full roof window is not the brief.
Once the roof windows are chosen, the next call is what finishes the opening and the room around it. If the opening takes hard sun, blinds usually come next. If you are lining out the reveal, glazing sheets are the bit that stops you bodging the finish later.
That is the sort of thing that gets missed on site. The window is in, but the surrounding work still needs a proper spec. Keep an eye on the adjacent trim and lining details as well. A neat unit can still look wrong if the finish around it is left to chance.






