VURB is a verification method developed by the National Construction Code that allows for a compliance with energy efficiency requirements, using computer modelling. Buildings with complex geometries often face difficulties achieving compliance with the code, using regular methods like star-rating or DtS. In such instances, VURB often helps to achieve the compliance of external glazing with a lower cost compared to the regular methods. With VURB, you can have insulation added in excess of what’s required to part of the building (i.e. ceilings or under-slab) as a compensation the weaker performance of cheaper glazing. Impact of thermal mass, solar gain, thermal bridging, two-way heat transfer through a concrete slab on ground and several other features are better accounted for, using VURB method.