Loft Conversion Roof Structure

The existing top line of the roof is extended to the edge of the building giving an additional box effect to the roof.

Loft conversion roof structure.

These are suitable for most types of home including terraced house loft conversions. The most common style of structural loft conversion these are an extension to the existing roof building out sections with vertical walls from the roof to add floor space and room for windows. This type of loft conversion involves one or both slopes of the roof being replaced with a new structure with very steep sloping sides almost as steep as the walls. This design is used where the original roof had little or no headroom and creates sufficient volume for an additional storey.

This type of loft conversion is only suitable for semi detached or detached properties with sloping roofs. This type of conversion will only work on detached or semi detached houses as it requires a free sloping side roof. According to the nationwide building society adding a loft conversion to your home can increase the value of an average property by more than 54 000. Internal roof elements to consider during loft conversions consist of a number of sub structures such as ridge boards rafters purlins joists wall plates and steel beams.

A hip to gable loft conversion involves altering the shape of your roof structure to gain space. Hip to gable conversions work by extending the sloping hip roof at the side of your property outwards to create a vertical gable wall creating more internal loft space. If your loft conversion includes the construction of a dormer it may be possible to remove part of the chimney in the loft also. This option is the most expensive as it requires the complex removal and rebuild of the existing roof.

The dormer is usually a timber frame construction but in this scenario that will change to include extra steelwork. Where you re adding a large dormer. Remove the entire chimney. Even though townhouse loft conversions have become extremely popular in the last couple of years the process of transforming a common truss into an attic truss isn t as easy as it may sound.

Changing the roof structure for a loft conversion. Most loft conversions employ at least one pair of steel beams to support the new floor structure and the roof slopes at purlin level and sometimes also at ridge level e g. However the average dormer loft conversion with a double bedroom and en suite costs about 35 000 45 000. This could be a hip to gable loft conversion or a mansard conversion for example.