Belzona has conducted waterproof repairs on the zinc dome of Shah Jahan Mosque in the UK, reports ConstructionWeekOnline.
Built in 1889 in Woking, the Grade II-listed structure is the oldest mosque in Western Europe outside of Spain.
The mosque’s zinc dome was included as an homage to the Green Dome at Al-Masjid al-Nabawi in Medina, Saudi Arabia, which sits atop the tomb of Prophet Muhammad (PBUH).
At 127 years of age, Shah Jahan Mosque’s zinc dome had developed a number of perforations around its circumference, and several large holes caused by weathering and corrosion. In addition, the dome’s lateral band of 41 zinc stars had succumbed to corrosion and loss of shape.
Consequently, rainwater had started to leak into the mosque, causing disruption at prayer times and during community events.
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To restore the 6.5m-diameter dome to its former glory, Belzona recommended a cold-applied repair method to rebuild the existing metalwork and waterproof the structure.
Prior to application, the company conducted a series of pull-off tests on the dome’s coating to assess its adhesion strength. Once the adhesion levels had been determined, the existing coating was removed using hand tools.
Belzona 1121 Super XL-Metal was used to rebuild and resurface the dome’s profile. In conjunction with a fine steel mesh fitted over the larger perforations, the metal repair composite was cold-applied without the need for specialist tools.
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Belzona 3111 Flexible Membrane was installed following some additional sanding and the application of conditioner.
The restoration took three days to complete, and is expected to provide Shah Jahan Mosque with long-term roof protection.