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Flat roof dormers tend to give the maximum amount of additional internal space, a dormer is a timber structure, often hung in tile to match the existing aesthetics of your home.
Rear Dormers are popular due to the fact that they create a large floor area and give good natural light through either large windows or even French doors, Dormers protrude from the roof slope, normally at the rear of the property, Dormer loft Conversions are typically used when additional headroom is required, as the dormer is an extension to the existing roof, allowing for additional floor space and headroom within the loft conversion. Internally a dormer will have a horizontal ceiling and vertical walls which provides additional space that can make a conversion feasible.
Depending on circumstance, planning permission is not always required as the conversion can be carried out with permitted development rights and meets certain other criteria.
Hip to Gable Conversions are for properties with a slopping side roof (Hip end) This means that the side of your roof slopes inwards towards the ridge rather than being a vertical wall on the side of your house. A hip-to-gable style conversion would change the shape of the roof from being a hip-end to a gable-end, thereby extending the existing the ridge and giving you a much larger loft area. A hip to gable conversion involves making fairly major changes to the roof. The new gable is built from stud work and normally finished in hanging tiles to match the existing roof. The gable wall is built up to the new ridge line usually from the internal wall plate, and a new section of roof is built to fill in the area, As a general rule, houses with hip roofs tend to not have enough internal volume over their existing stairs so a hip to gable is usually constructed to carry a new staircase over the existing staircase, a hip to gable conversion usually is the best solution to make the internal finish look like the new stairs have always been there, over the existing. Once the roof has been extended the loft conversion is normally completed with a window in the new gable to allow natural light in your new stairwell and the new room would have Velux windows. This then can allow a dormer on the rear off the property if required As a hip to gable conversion changes the outline of the roof planning permission may be required.
Cottage Dormer loft conversions are usually situated at the front of a property, A Cottage dormer is constructed of stud work and usually finished with hanging tiles, although many new builds are now finished in lead, The dormer is a vertical window with a roof of its own, positioned, at least in part, within the slope of the roof incurring a lead valley at either side.
Cottage Dormers a perfect way to achieve headroom where it might otherwise be difficult building a cottage dormer opens up the loft area so you can make most of the roof space.
When early cottages were built there were no dormers because there were no window openings at first floor level, So vast numbers of cottage dormers are actually retrofits and yet so often they appear original. Why? Because they are not too big, and they are in proportion with the roof. It is vital Cottage dormers must be an integral part of the overall design of the property, if they are built to large the results look terrible, as they overpower the rest of the house.
Since new building regulations were introduced in 2008, many local authorities allow dormers to be built without planning permission providing the design is within their guidelines.