All UK Lofts
Monomark House, 27 Old Gloucester Street, London WC1N 3AX
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TYPES OF LOFT CONVERSIONS - photo library images used on this page

Conversions are defined into different categories according to design and how any potential new space is added:

Rooflight Conversion The existing roof space is converted with no increase to the volume other than the simple addition of rooflights to the front and back. Windows may also be added into the gable walls. This is the most cost-effective option as it involves minimal alteration. 

Dormer Conversion Dormer windows are added into the pitched roof plane to increase volume at the back or sides, and sometimes at the front. These may be relatively small extensions housing one or two windows (especially at the front facing the highway), but may be much larger across the whole of the roof width (usually at the back), forming a large area with full headroom. 

Hip-to-Gable Conversion When a roof slopes down to the eaves on all four sides it is known as a ‘hipped’ roof. To increase the usable space within a hipped roof, one (typically on a semi) or more hips can be replaced by a gable wall and the roof extended over the gables to create more volume.

Gable-to-Gable Conversion Common in terraced houses, the gable walls are built up and the roof at the back rebuilt to increase the pitch so it is nearly vertical up to ceiling height, effectively forming a wall with windows, and then almost flat back to the ridge, forming a large area with full headroom.

Mansard Conversion
This involves replacing the whole roof with a new box-like structure that effectively adds another full storey, with four almost vertical tile-hung walls, topped by a near flat roof. On a terraced house a mansard roof may span from gable to gable, front to back.

All UK Lofts will come out to your home to discuss your preference and an estimate of costings involved

Product descriptions above are provided courtesy of

Strengthening of Existing Construction

According to Wikipedia, the existing ceiling joists in most houses are only designed to support the weight of a ceiling, therefore additional support will be required to transfer the loads from the new loft floor to the walls of the house. Again this is an area where AllUKLofts have expertise in selecting the correct materials.

can obtain and install I-beams or rolled steel joists(RSJs), these can either be installed in single lengths or in smaller sections which are bolted together. New timber joists are then installed between the RSJs onto which the new floor can be laid. A structural engineer will calculate the size of the RSJs and joists.  AllUKLofts will ensure all is carried out in safety during and after installation.