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.
Loft conversion roof structure.
This option is the most expensive as it requires the complex removal and rebuild of the existing roof.
Altering the roof structure floor joists most roofs are constructed with internal support struts in the loft propping up the rafters and purlins horizontal roof beams in traditional cut and pitched roofs and making up the web of braces in modern trussed rafter roofs.
These are suitable for most types of home including terraced house loft conversions.
Where you re adding a large dormer.
This could be a hip to gable loft conversion or a mansard conversion for example.
This design is used where the original roof had little or no headroom and creates sufficient volume for an additional storey.
Changing the roof structure for a loft conversion.
In the roof space as the name suggests the ridge board is the length of timber which runs horizontally along the apex of the roof.
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.
An almost flat roof is placed over the top.