020 3005 2873
Stone Façade Structural Repairs – Parliament Hill School, Highgate, London
Project Overview
MGS Restoration Ltd were commissioned to undertake specialist stone façade structural repairs at Parliament Hill School, Highgate, London, following the identification of significant stone deterioration caused by long-term water ingress.
Located in one of North London’s most prominent educational settings, Parliament Hill School occupies an impressive historic campus where the preservation of the building fabric is essential to both appearance and long-term performance.
The project centred on a severely damaged section of stonework located high on the building façade. A defective rainwater drain near roof level had allowed water to penetrate the masonry over many years, resulting in extensive saturation and progressive deterioration of the stone.
Working during the school holidays to minimise disruption, MGS Restoration carried out a specialist structural rebuilding programme at heights of up to 20 metres, restoring both the stability and appearance of the affected masonry.
Project Details
Location: Parliament Hill School, Highgate, London
Service: Structural Stone Repairs and Façade Restoration
Building Type: Educational Facility
Project Type: High-Level Masonry Repairs
Access Method: Mobile Elevated Work Platform (MEWP)
Working Height: Approximately 16–20 metres
The Challenge
Investigation of the façade identified that a broken rainwater drain located near the roofline had been allowing water to penetrate the stonework for an extended period.
Over many years, this constant moisture exposure had caused the stone to become heavily saturated. As the deterioration progressed, the stone began to:
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Delaminate
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Lose structural integrity
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Break down internally
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Separate from the surrounding masonry
A substantial section of stone had become unstable and required rebuilding rather than simple cosmetic repair.
Because the affected area was located between 16 and 20 metres above ground level, all works had to be carried out using specialist access equipment and strict health and safety procedures.
Prior to restoration works commencing, the defective drainage system was repaired to eliminate the source of the water ingress and prevent future deterioration.
The Restoration Process
High-Level Access and Safety Planning
Due to the location of the repairs, all works were undertaken from a mobile elevated work platform (MEWP).
The project was scheduled during school holiday periods to ensure a safe working environment and eliminate disruption to staff and students.
All access operations were carried out in accordance with strict health and safety procedures.
The MGS operative responsible for the works held full IPAF (International Powered Access Federation) certification, ensuring safe operation of access equipment throughout the project.
Structural Stone Rebuilding
The deteriorated stone section required a full structural rebuild due to the extent of material loss and internal degradation.
Our restoration team carefully removed all unstable material before carrying out a specialist reinforcement process.
This included:
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Precision drilling into the existing masonry
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Installation of stainless steel reinforcing rods
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Chemical fixing using specialist anchor resin systems
The reinforcement framework created a secure structural foundation for rebuilding the damaged section.
Stone Reconstruction
Once the reinforcement system had been installed, the damaged area was carefully rebuilt using a specialist Portland stone premix repair mortar enhanced with strengthening additives.
This allowed the missing stonework to be reconstructed while maintaining compatibility with the surrounding masonry.
The repair was shaped and finished to match the original architectural detailing and profile of the façade.
Pointing Repairs
While access equipment remained in position, MGS Restoration also carried out localised pointing repairs to surrounding masonry areas.
Missing and deteriorated joints were carefully reinstated to improve weather resistance and help protect the building fabric from future water penetration.
Materials and Techniques Used
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High-level façade access systems
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IPAF-certified MEWP operations
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Stainless steel reinforcement rods
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Chemical anchor resin systems
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Portland stone premix repair mortars
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Structural stone rebuilding techniques
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Heritage masonry repair methods
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Traditional pointing repairs
The Results
The completed restoration successfully stabilised and rebuilt the damaged stonework, restoring both the structural integrity and appearance of the façade.
The combination of stainless steel reinforcement, specialist anchor resin systems, and Portland stone repair materials provided a robust and durable solution capable of withstanding future environmental exposure.
The additional pointing repairs further enhanced the weather resistance of the surrounding masonry, helping safeguard the building against future deterioration.
By carrying out the works during school holidays and maintaining strict health and safety standards throughout, MGS Restoration delivered the project efficiently while ensuring minimal disruption to the school environment.
School Building Restoration in Highgate
This project demonstrates the importance of addressing the underlying causes of stone deterioration before undertaking restoration works.
Through careful diagnosis, structural reinforcement, and specialist masonry repair techniques, MGS Restoration Ltd successfully restored this damaged section of stone façade while protecting the long-term integrity of the building.
Contact MGS Restoration
If your school, heritage building, or commercial property requires specialist stone repairs, façade restoration, or structural masonry works, our experienced team can help.
MGS Restoration Ltd provides professional stone restoration and structural repair services across London, working with educational buildings, heritage properties, listed structures, and commercial developments.
Contact us today to discuss your project or arrange a site inspection with one of our restoration specialists.
Address
MGS Restoration ltd
167-169 Great Portland Street,
5th Floor,
London,
W1W 5PF
Phone
020 3005 2873
