Velux, Dormer, Mansard and Raised Gable are common types of loft conversions. In this article, we will look at each type in detail to give you an idea of what is involved, advantages and disadvantages, how much space they could add to your home, and how they would transform the look of your house.
Also referred to as a Velux loft conversion since these are the type of windows commonly used in this type of renovation project, Roof Light design is the simplest type of loft conversion. As a result, it’s also the least expensive. It involves simply renovating the pitched roof to add in a couple of skylight windows. The existing structure, and size of the roof itself don’t change.
These extensions were extremely popular decades ago and remain so today - especially in London. They are usually built at the rear of the property and are used for creating additional bedrooms. You’ll find them added to a sloping roof at 90 degrees and in the shape of a rectangle, i.e. they have a flat roof and vertical sides. It’s also possible to have an L-shaped Dormer on the older Victorian and Edwardian style properties with rear extensions.
The most extensive – and therefore expensive - option, a Mansard extension involves altering the design of the roof by adding a horizontal edge and a vertical straight wall (so that you have three sides to the roof as opposed to the standard two sides). But, unlike a dormer, loft conversion it stands at 70 degrees (rather than 90 degrees) from the existing roof.
With this type of loft conversion, which is also referred to as a ‘raised gable,’ one side of the house (or both) are replaced with a gable wall. In order to achieve this the side of the sloping roof is extended by removing the roof and erecting a triangular vertical wall. The space between the central ridge and the new wall is connected via rafters and tiled over.
As well as the obvious advantage of having an extra bedroom - or two - in your house, a loft conversion will increase the value of your home by twenty per cent on average, and it’s certainly a less stressful way of gaining more space than moving home.