Whilst the lead-in period for unitised systems is longer than standard stick systems, the on site installation period is significantly shorter. Any external access, as required with stick curtain wall, is not a requirement for the installation of unitised systems.

On site programme gains are enhanced by better quality control as the manufacture and assembly of the unitised glazing system is carried out under controlled factory conditions.

Considerable benefits can be derived from using this system, including a reduction in health & safety risk, speed of installation, more predictable & controllable on-site installation and a reduction in peripheral but considerable on-costs such as the provision of external access which is not required for unitised system installation.