A Roof Condition Report carried out on the Metropolitan Police Authority’s Quicksilver Patrol Base in London stated that the original system integrity was seriously compromised, with high levels of ponding, standing water and leakage to the main roof area.
Varying levels of deterioration across the roof areas were also recorded and clear recommendations for how these would be addressed were given within the site-specific specification.
Vinci Facilities appointed approved installer TR Freeman to refurbish the 2,200m² of existing roof areas using Alumasc’s Euroroof SupaGOLD Warm Roof System.
The waterproofing system also included the refurbishment of the original roof lights with Alumasc bespoke rooflights.
The first step was the complete strip and removal of the deteriorated waterproofing system from the metal deck beneath.
Appropriate surface preparation to the area was then undertaken prior to the installation of the Vapour Control Layer; providing immediate protection against water ingress into the main building and offices below.
Areas identified as suitable for “up-grade” received necessary preparation works and surface conditioning, prior to the application of the proposed specification.
The Alumasc cut to falls (tapered) scheme was designed to enhance and overcome the existing design falls to each respective roof area.
The design brief for the drainage plan was to utilise the existing drainage locations, remove standing water from all roof areas and meet the target U-value of an average 0.18W/m²K.
TR Freeman then applied the Euroroof SupaGOLD waterproofing system, which comprised of a Vapour Barrier, PU bonded PIR Insulation SUPA XL Underlay and finally the Euroroof SupaGOLD capping sheet.
