Horbury School - Extensive Green Roof Installation

Horbury School - Green Roof

Project Overview

Project: Horbury School, Wakefield
Area: 1,500 m²
Completion Date: February 2009
Contractor: Watershed (Roofing) Ltd, Bradford
Client: Wakefield Metropolitan District Council
Specifier: NPS Group
Main Contractor: Miller Construction Ltd, Normanton
System: SureWeld TPO, Extensive Sedum RoofMonarfloor Tranquilt

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Horbury-School-02Designed by NPS North East property consultants, and built by Miller Construction the building is steel-frame with metal stud and plasterboard internal walls, with heavyweight concrete floors and roofs to help to reduce overheating. This provides good levels of acoustic separation and reduces fabric heat losses to 10% lower than Building Regulations requirements.


Horbury-School-03The new school project was phased over a three-year programme, with demolition and rebuilding on the 11,500m² site continuing while the 1000 pupil school remained open.

The brief for the new school was to design a college based on the Building Schools for the Future layouts, and this included the requirement of a "very good" sustainability rating, as measured through the BRE's Environmental Assessment Method (BREEAM).


Icopal’s Monarfloor Tranquilt lightweight acoustic isolation system is capable of exceeding the requirements of the Part E & Building Bulletin 93 regulations in terms of impact and airborne sound insulation. It was installed under the floor screed on the ground and first floors including beneath the canteen and meeting areas of the central atrium to limit noise transmission.

In addition on phase one, Icopal’s extensive sedum green roof system incorporating the Total Torch and Rootbar capsheet system, was installed by Watershed Roofing on the roofs of the science and art and design technology classrooms.

On the other roof areas, Watershed Roofing installed Icopal's Sure-Weld TPO which is a fully recyclable advanced Thermoplastic Polyolefin single-ply roofing membrane that is free of PVC and specially formulated for long-term exposure Without the use of either polymeric or liquid plasticisers.

The three types of building membrane from Icopal have helped the new £22 million school in Wakefield achieve its ‘very good’ BREEAM rating.
The project had a tight programme which was hindered by bad weather but the Icopal products performed very well and the end result is excellent.
The school was officially re-opened in July 2009 by Ed Balls MP, the Secretary of State for Children, Schools and Families. 



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