Central House
London EC3

The external refurbishment of this modern reinforced concrete framed building is the fourth project that Triton have undertaken for London Guildhall University as main contractor.

Like many other buildings of similar design, Central House had been generally suffering from rusting reinforcement bars, with concrete spalling from the panels, cills and beams. The mastic sealant between the concrete panels and windows had also failed in its entirety and decorative finishes were in an advanced state of deterioration.

All surfaces to be repaired were firstly cleaned down with a mild detergent/low pressure water wash. Defective areas of concrete were then cut back to a sound substrate, with all corroded reinforcement removed, before cleaning of the retained reinforcement by grit blasting. New mild steel reinforcement bars were inserted as necessary and all bare steel was treated with a zinc primer. Using a Fosroc Dekguard concrete repair system, original profiles were restored and textures reproduced, including exposed aggregate finishes.

Before all concrete surfaces were redecorated with Fosrok Dekguard, the metal windows were overhauled, the mastic replaced and anti-pigeon netting reapplied to the light wells.

In successfully completing the 12 week contract, to fit in with the University holiday timetable, a 40% addition to the original scope of works was accommodated within the original contract period.

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