Home owners are often looking to add a bedroom or master suite and often with houses or bungalows that have large loft spaces a loft conversion is the answer. Loft conversions vary in cost and complexity dependant on the size, specification, layout and design of the existing construction. With more modern properties the roof structure is often constructed using roof trusses rather than the traditional stick built method of purlins and larger rafters. This means that members of the roof trusses are often in the way of living space and need to be removed to make the loft space useable and ready to be converted into a loft room. However when the roof trusses are altered or sections removed this can affect the structural integrity of the roof and this can be potentially dangerous and costly to repair if not done correctly. So your building contractor or architect will need to employ the services of a structural engineer to make sure that the new design conforms to part A of the UK building regulations and is safe. The alterations can be made if the existing structure is upgraded this is usually done by adding additional timber and steel supports usually in the form of steel beams or RSJ’s as they are more commonly know. These are often used to support the new floor joists and upgrade the roof structure once sections of the roof trusses have been removed. These new steels transfer the weight or loads from the new floor and roof structure down onto existing load bearing walls. It is important to select a building contractor who has experience in working with structural steels and carrying out more complex projects as the positions of these steels is critical to the structural integrity of the roof. This is particularly important if you currently have a trussed roof and you are installing ridge or cranked beams to carry the loads that have been transferred from the trusses that have been altered or removed.