cs Alexandra National House
Alexandra National House Alexandra National House

Alexandra National House

Alexandra National House

Name of project:  Alexandra National House
Location:  London
Client: London Borough of Hackney Council
System:  PVC single ply
Product: Armourplan SG120
Membrane:  Armourplan SG120
Main contractors:  BriggsAmasco
Size:  1,000m2

As part of a regeneration programme in the area the former Alexandra National House, opposite Finsbury Park on Seven Sisters Road, was demolished in 2010.  In 2011 a successful bid was awarded from the Homes & Community Agency, which is a government scheme to help rebuild areas of social needs called “Local Authority New Build 2”.

London Borough of Hackney worked closely with developers Lovell Partnership and PCK Architects to produce a scheme at Alexandra National House that consisted of 67 houses, an improvement to the old Alexandra House which was mainly made up of bedsits.  The new development includes much needed family sized three and four bedroom homes.  The council agreed that an additional 42 homes for private sale would be built and a further 20 homes for council ownership.  The site is a major new landmark for the area.

The roofing specification was particularly difficult for the 1,000m2 roof area because it needed a tapered insulation scheme that would take the rainwater from one side of the building to the other.  The design criteria had to take into account the complex shape of the roof area as the main facade had no drainage on the external or internal areas of the building.

PCK Architects and Lovell Partnership specified Armourplan SG Mid Grey single ply waterproofing membrane which consists of polyester-reinforced PVC.  The system was installed by accredited roofing contractors, BriggsAmasco.  The materials were chosen not only for their high performance, but also because Armourplan is the only UK manufactured single ply available, it provided much needed green credentials for the area.

The project was completed […]

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Project Merlin Project Merlin

Project Merlin

Project Merlin

Project Name: Project Merlin Location: High Peak, Derbyshire Products: IKO Armourplan Roofing Contractor: Pochin Construction Architect: Fletcher Rae Architects

Waveform roof structure blends with High Peak’s rolling scenery

Armourplan PVC and Recticel Insulation by SIG Design Technology were selected for a 12,000 m2 roof to a bottling plant in a rural location on the outskirts of an historical Derbyshire spa town, known as Project Merlin.  The FMCG company chose to build the new facility away from the site of the natural spring, piping the water some two miles out of town to this green field bottling and distribution site.

To ensure the roof at Project Merlin blended seamlessly with the breathtaking High Peak scenery, local planners choose a membrane finish to be manufactured in a special order-only colour:  bottle green.

They also suggested the product could be locally manufactured and chose Armourplan PVC as it is produced by IKO near the town made famous for its twisted spire, Chesterfield, in the north of the county.

The project was constructed on a Design & Build basis by Pochin Construction of Middlewich, Cheshire. Designed by Fletcher Rae Architects of Manchester, the elegant roof form comprises a series of four barrel vaulted roofs which create a ‘waveform’ effect with a sleek finish.

Each of the roofs was constructed independently by building envelope contractors GM Services of Stockport. There is a perimeter zone to all of the barrel vaults and the roof construction is joined at the three gutters between.

The roof build-up comprises a metal deck with vapour control layer and Recticel foil-faced insulation boards. Lamella boards were used at the top and bottom of the curves and the building is waterproofed in Armourplan Premium PVC single ply membrane.

Armourplan ‘P’ […]

Marks and Spencers Marks and Spencers

Marks and Spencers

Marks and Spencers

Project Name:  Marks and Spencers
Location:  The Gyle Shopping Centre, Edinburgh
Client:  Marks and Spencers
Product:  IKO Armourplan

Roof repair and replacement: How to re-roof a building whilst in use

This is Edinburgh’s largest Marks and Spencers retail store, at The Gyle shopping centre, built in 1993.

In 2010-2011 the metal composite roof of the 106,000 sq ft retail unit rapidly developed leaks and the owners were facing months of disruption and lost revenue whilst vital re-roofing was carried out.

It is possible to re-roof a building whilst trading normally, saving a retailer hundreds of thousands of pounds in lost business and customer disruption, but the project needs to be carefully co-ordinated.

What to consider when re-roofing

Here are some points to consider when looking at re-roofing a building in use:

  1. In order to avoid noise disturbance, choose a bonded roofing material rather than mechanical fixing. At the Marks and Sencer Gyle project, Graham Roofing (Scotland) Ltd used SIG IKO Armourplan PSG120 bonded with SIG IKOpro PU Hi-Performance Adhesive.
  2. Re-roofing is also a good opportunity to increase the insulation u-values of a roof, upgrading the specification and thereby mitigating future running costs. It is also essential to carry out a survey of all interfaces to ensure that any additional insulation thickness maintains compliance with minimum upstand requirements to meet the Building Regulations.
  3. The greatest risk to the success of your project is poor communication, so ensure that a competent and insured Designer Manager manages and takes responsibility for the re-roofing. At Marks and Spencer Gyle, SIG Design & Technology provided detailed design and design management, giving expert and PI Insured design services, project co-ordination, Site Inspection and full system guarantees.
  4. Contractors must not disturb customer access to the facility, so it is essential to ensure that all […]