When a factory-constructed building bears the label of an accredited certification body, the certification body guarantees that the work completed in the factory meets the requirements of the codes and regulations in effect at the installation site. This label (and the associated documents) provide local inspectors with assurance that concealed components and the portions of the building that were constructed in the factory do not require re-inspection on site.
A label is applied to the building when it is shipped from the factory that shows that the home was produced in a certified factory in accordance with applicable local codes and regulations—as detailed on the specification sheets inside the house.
In whole buildings, a specification sheet is typically found on or near the electrical panel—somewhere where it is unlikely to be removed. For modules and panels, the sheet is provided to the building owner and retained with the building. The specification sheet provides the information needed to determine if the building has been designed and constructed for the installation location:
- to address the wind, snow and earthquake loads at the installation site
- to provide adequate resistance to precipitation ingress
(for some locations, if there a capillary break inboard of the cladding)
- to comply with the energy efficiency requirements for the climate zone—overall energy performance or thermal resistance of insulation
- outside design temperature used in heat loss calculations
- installed or supplied appliances (make, model, energy type)
- complete electrical rating
- if applicable—whether the building or module conforms with the deformation-resistance test provided in CSA Z240.2.1. to confirm compliance with site-specific requirements