Established in 1963, University of East Anglia (UEA) is a public research university in Norwich with four faculties and 26 schools of study. The Bio Teaching Annex Roof had reached the end of its serviceable life with the existing asphalt roof in need of replacing along with the current Georgian wired rooflights.

The specification

Our bituminous Bauder Total Roof System was specified for this project because of its incredible longevity, with BBA certificate 10/4744 stating it has a service life in excess of 35 years. BTRS is robust, heavy duty and extremely tough, and has fire classification BROOF (t4), achieves ‘Low vulnerability' for Scotland, and is verified by the BBA as ‘unrestricted’ therefore making it suitable for use on any part of a roof.

The client requested new glazing units due to the original Georgian wired rooflights being at the end of their life and not in accordance with current health and safety requirements. Bauder double-glazed glass rooflights were therefore specified to comply with the latest fragility and thermal requirements. The rooflights were specially designed to suit the Bio Teaching Annex Roof, and fitted to the existing aperture kerb.

The client also requested to shorten the run of roof light so a dedicated walkway at one end could be formed which would enable a safe access across the roof. It was agreed by the client that the new rooflight unit would be pulled away from the parapet wall which would allow access for weathering the kerb correctly, alleviating any weak spots in the waterproofing and minimising the potential for leaks.

Products applied

Bauder Total Roof System (BTRS):
Fully integrated bituminous waterproofing system.

Bauder Structural Rooflights:
Bespoke structural glazing installations allow designers and architects complete freedom when incorporating natural daylight into a roofing project.

In this roof situation, the white polyester, powder coated, thermally broken, insulated aluminium upstand was supplied with hit-and-miss ventilation.

This supported 31.5mm double-glazed glass sealed units to the following specifications:

• 6mm clear toughened outer leaf complete with 100mm black border to face ‘2’
• 16mm argon-filled cavity (black spacer bar)
• 9.5mm clear laminated inner leaf with low ‘E’ coating
• Glazing was supplied in 6 pieces with each piece weighing 126kg

The result

For the client’s peace of mind, the Bauder structural rooflights were guaranteed for the same duration as the waterproofing system, BTRS. The project was signed off for guarantee in the autumn of 2018 by Wayne King, Bauder site technician, after the workmanship was deemed to be of an acceptable standard after the project’s final site inspection.

Bauder Total Roof System (BTRS)