A SIGnature dish

Health and safety was paramount for DVC Roofing as they used SIGnature Torch On system to re-roof a ‘live’ factory full of staff.

It’s one thing to replace a roof when the building beneath is empty; quite another to do it surrounded by the busy environment of a working factory. Weir Engineering was one such project. The flat roof of the factory had a number of problems to resolve, however as a leading engineering firm with an extensive client base, halting operations wasn’t an option.

As part of the SIGnature service, SIG Roofing’s Specification Business Development Manager, Ian Dryden, visited the site to carry out a full roof inspection. To assess the site as safely as possible DVC Roofing used a drone to video and photograph the condition of the roof from every possible angle. These investigations identified a number of areas needing attention. It was immediately clear that the existing bitumen membrane had exceeded its life expectancy. The insulation deck was saturated and all the perimeter flashings were split and had detached from the upstands. Interstitial condensation caused by high humidity inside the building, exacerbated by a lack of ventilation and the cold roof design were all contributing factors to the roof’s condition.

The service didn’t stop there. Ian drew up a specification to address the issues and handled the tender process with accredited SIG DATAC SIGnature installers. Ian’s solution was to specify a new SIGnature Warm Roof system comprising:

  • SIGnature Torch On Vapour Control Layer
  • SIGnature Approved 80mm BF Insulation
  • SIGnature 25 Underlay
  • SIGnature Capsheet

DVC Roofing won the contract and work began in May 2016, with the first task being to prepare the site safely. As part of that the factory was fully netted, both to protect the contractors from falling and shield the factory workers from falling debris. The existing defective materials were then stripped back to the metal profile sheet. All the old flat roof skylights were removed and replaced with new barrel vaulted insulated aluminium windows.

A new Vapour Control Layer (VCL) was fixed direct to the metal profile sheets. New 80mm flat roof board insulation with staggered joints was adhered to the VCL with SIGnature Approved Pu adhesive. This ensured the VCL was not breached by using screw fixings.

Once the VCL and Insulation had been installed a 2 layer SIGnature Bitumen membrane system was fully torch bonded to the SIGnature Approved BF Insulation, this consisted of SIGnature25 Underlay and SIGnature AA Capsheet, and all perimeters were finished with a SIGnature approved GRP Edge trim to ensure a long lasting and aesthetically pleasing finish was achieved.

This roof was completed to SIGnature specification and regularly inspected by a SIGnature Specification BDM, Ian Dryden, to track progress and note the quality of workmanship.

The end result is a beautiful new roof with a 25 year warranty. All achieved safely and while the work of the factory carried on in full swing.

SIGnature’s start to finish service provides peace of mind for the client and a smooth running project. It includes:

  • A full roof survey
  • Specification writing
  • Safety assessment and preparation of the site
  • A full detail design
  • Tender process with approved contractors
  • Regular inspections and progress reports
  • All documents collated for the client to confirm the 25 year guarantee