The challenge that faced the end client on this project was that the Units were fully tenanted and they had been suffering from roof leaks and roofing issues for a number of years. The roofs were also asbestos cement which had to be treated with a great deal of care and planning to ensure the occupiers safety during the works. The site was very heavily populated, with active businesses and heavy traffic flow throughout. The client was looking for an economical solution for carrying out the refurbishment works whilst causing minimum disruption to the tenants. H & S was of paramount importance, co-ordination with the tenants and accommodating their everyday needs was essential to ensure the project ran smoothly.
We worked closely with Avison Young throughout the tender process, the project was then competitively tendered and C & W Industrial Roofing Services Limited duly won the tender for the works. The specification was then scrutinised and following numerous meetings between the management of both C & W Industrial Roofing Services Limited and Avison Young, the final specification was agreed.
The works to be carried out were the oversheeting of all of the existing Asbestos cement roofs, as well as the re-lining of all of the the valley and eaves gutters. There was also a requirement for the existing roof lights to be replaced prior to the oversheeting of the roofs to improve the natural sun light within the buildings.
The site was split up into 4No blocks, A, B C and D and the total roof area of all of the blocks was 29,980m2 made up of 47 units in total. As you can imagine, each unit had to be approached in a specific manner with regards to safe access installation and roof works co-ordinated around the tenants accordingly. Problems such as static racking, suspended ceilings, fabricating machinery, low level lighting grids and 24 hour working within a number of these Units.
The solution to all of the client and tenant issues was to oversheet the existing roof with a 0.7mm profiled steel sheet, to include new 240mm insulation so that the buildings complied with the current building regulations. The existing roof lights were to be replaced with new, matching profile, GRP roof lights and the gutters were to be re lined Messrs H D Sharman Limited Plygene gutter liners. This was all to be fixed into position using a new Ashgrid system at a fraction of the cost to replace the complete roofs. A mixture of sacrificial netting, safety netting to the underside of the roofs and complex spandex walkways were used to ensure our operatives safety. Regular monitoring of the air was undertaken throughout the project to confirm to tenants that airborne fibres were constantly at a safe level.
All works were carried out within programme and the result was that the client has been left with a 25-year guaranteed system to the roofs, as well as a 25-year manufacturer’s guarantee to the gutters, with a life expectancy of 30-years on both. Furthermore, the tenant has benefited from improved UV light within the unit, as well as the thermal insulation of all units being vastly improved. This was all carried out for a fraction of the cost of replacement and all at very little disruption to the tenants. In addition to the above, the works have increased the value of the units and the entire estate has benefitted from an improved aesthetic.