Paxman Avenue Secondary School Case Study

Paxman Avenue Secondary School is a new build project situated in Colchester, Essex. The school opened its doors for the first time in September 2019 welcoming 180 year 7 students. It is expected that the school will eventually hold 900 pupils by 2023.

Bauder Building Board

Project: Paxman Avenue Secondary School
Location: Colchester, Essex
Project type: New build
Roof size: 2500m²
Architect: Concertus Design & Property Consultants
Main contractor: Barnes Construction
Approved contractor: G.R.M Roofing Company Ltd

The project

The main contractor, Barnes Construction, was looking for a durable, cost effective roof with longevity, and wanted a waterproofing system which included a comprehensive guarantee with great service and full support from the supplier, and so Bauder’s bituminous system, Bauderflex, was specified.

Bauderflex is Bauder’s highly rated reinforced bitumen membrane system with a choice of self-adhesive and torch-applied membranes that are resistant to high levels of structural and thermal movement. Within this specific project, the system incorporated a self-adhesive air & vapour control layer, BauderTEC KSD Mica, which allowed the system to be installed quicker and cleaner, making it time efficient.

The SBS modified elastomeric membrane provided within the Bauderflex system is a robust, durable and highly adaptable solution that can withstand foot traffic and most permanently sited plant and equipment. The system is estimated to have a life expectancy in excess of 30 years BBA stated.

Bauder Euroglaze rooflights were fitted to the roof to increase natural light into the building. The Euroglaze rooflights are made to order and the size can therefore be tailor made to fit any roof aperture, with many ventilation and glazing options are available to meet the demands of any type of project.

Bauder’s Rainwater Calculation Software was also used to perform calculations in accordance with BS EN 12056-3:2000 based upon provided data relating to the building’s dimensions, geographical location and the flow rate performance of the selected Bauder rainwater outlet product. This helped to determine the total number of outlets needed for the roof.

The client was supported by the Bauder Area Technical Manager, Andy Leggett, from start to finish with help being provided on the design element of the project, and the Bauder approved contractors, G.R.M Roofing Company Ltd, were supported by Bauder site technicians throughout the installation.

Applied products


K4E cap sheet in Charcoal Grey Bauder K4E Capping Sheet is a high performance, torch-applied SBS elastomeric bitumen capping sheet. The product features a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture, and a mineral finish to provide protection against UV degradation. K4E in the colour Charcoal Grey was chosen to give the project a sleek aesthetic.
BauderTEC Sprint DUO underlayer BauderTEC Sprint DUO Underlayer is a technically advanced self-adhesive SBS elastomeric bitumen underlayer with “DUO” lap technology to ensure thorough sealing of lap joints, even in lower temperatures. The product features a glass fleece reinforcement for strength and stability, and benefits from a cleaner, safer and faster installation than traditional torch-applied membranes.
BauderPIR FA-TE insulation BauderPIR FA-TE Flatboard insulation with 140mm thickness was included in the build-up to help meet the U-value of 0.15W/m²K. FA-TE insulation is an extremely efficient PIR insulation board with aluminium foil facing on both sides. It is lightweight and has zero ozone depletion potential.
BauderTEC KSD Mica Air & Vapour Control Layer BauderTEC KSD Mica Air and Vapour Control Layer is a technically advanced, robust, self-adhesive SBS elastomeric bitumen air & vapour control layer, with a mica finished upper surface to allow easy bonding of insulation using the specified Bauder insulation adhesive. One side lap features an 80mm wide glass fleece along the underside, and a 100mm laminated strip above, with the other side lap having a thermofusible film on the top surface. This arrangement ensures that laps are heat sealed using hot air or gas torch as appropriate to extrude a bitumen bead, thus ensuring waterproofing integrity.
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