Plagued by roof defects, MPs’ Portcullis House faces more hefty repair bills

The Westminster office block, predicted to last 120 years, has suffered with faulty glazing from the beginning

When the parliamentary office building, Portcullis House, was completed in August 2000 at a cost of 235m, it was predicted to last more than 120 years with lower maintenance costs thanks to the quality workmanship and premium materials.

Its glazed roof has been anything but maintenance-free, with officials reporting falling bolts, cracks and broken panes. In the latest incident last month, water poured into the atrium after a huge bang".