If you want to brighten a loft or add a window to a room in the roof, the two main options are roof windows and dormers. They work in different ways, and the right choice depends on what you want from the space.
Roof windows
A roof window sits in the plane of the roof, at the same angle as the slope. It lets in a good amount of light, often more than a vertical window of the same size, because it faces the sky. It does not add headroom or floor space, but it is a simpler, less intrusive change. Installation is generally quicker and does not alter the shape of the roof.
Dormers
A dormer is a box that projects from the roof, with a vertical window in the front. It adds headroom and usable floor area, which can make a loft room feel properly spacious. It changes the look of the house, needs a bigger structural job and often requires planning permission or at least careful checks under permitted development rules.
Which suits you?
If the loft already has good headroom and you simply want daylight, roof windows are often the sensible, economical choice. If you want to turn a low loft into a proper bedroom or study, a dormer may add the space you need. Some people combine the two.
Think about the roof
The roof structure, pitch and any chimneys affect what is possible. Both options need weatherproofing details done properly, with good flashing and insulation.
Ask for advice
We install roof windows and can look at your loft to say whether they will give you what you want.
See our VELUX Window Installers section or call 07766 547309 for a free quotation.
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