Royal Military Academy


This high profile project involved the renovation of the 200 year old, Grade II listed, Old College at the Sandhurst Royal Military Academy.

The roof works to this historic landmark building were carried out by specialist contractor CEL Leadwork Ltd in keeping with the original design and detailing. This included removing and renewing the entire roof along with the demolition and rebuilding of 58 chimneys. Approximately 200 tonnes of sand cast lead were used on the project along with 165,000 slates installed in a phased process over a construction period of 24 months.

As part of the re-roofing work, the Airtrak ventilators were incorporated into the design to ventilate the roof voids in keeping with the recommendations of BS5250.

Nicholson worked closely with CEL Leadwork Ltd to manufacture the Airtrak ventilators to suit the exact site dimensions and also to ensure that the Airtrak ventilators were manufactured, stocked and delivered to site within the required time frame to keep the contract on schedule.

Ventilation details – parapet gutters

As is traditional with properties of the mid Georgian era, the slated pitched roofing of the Old College building is set behind parapet walls with tapered box gutters running around the perimeter of the property. The leadwork to these gutters is ventilated at the abutment with the parapet and also at the junction of the gutter layboard and slating.

Nicholson produced a special profile for ventilating the eaves of the slated roof over the layboard taking into account the counter battening used in the new roof construction.

Ventilation of flat and pitched roof areas

Various standard and bespoke Airtrak ventilators were used to ventilate the flat and pitched areas of the Old College building. The Airtrak system of stainless steel ventilators can be adapted to meet site conditions allowing specialist contractors such as CEL Leadwork to deal with the issue of ventilation in a professional and consistent way.

Nicholson was delighted to be involved in this high profile project providing a solution to the important issue of ventilation. The Airtrak range of ventilators is supplied with sturdy spacers to maintain the required ventilation gap and an integral flyscreen.

For further information, please call our technical team on 01763 295828.



Main Contractor

CEL Leadwork Ltd

Products Used

Roof Void Ventilation System

AIRTRAK is a proprietary range of ventilators designed specifically for the ventilation of roof voids. AIRTRAK assists specifiers, builders and specialist contractors in helping them to meet the requirements of the Building Regulations in relation to the important issue of roof void ventilation and the control of condensation.

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