The ARBOFLEX® PU liquid applied waterproofing system from CARLISLE®️ was chosen for the Park Avenue Place at Neptune Wharf thanks to the long-term performance and integrity it offers. A single component system with proven root resistance and ease and speed of installation, it was ideal for the green roof project.
Complete solution
CARLISLE®️ supplied a complete roof build-up for all the roofs, terraces, and balconies of the development’s apartment blocks, along with the podium deck and the planters.
The roof build-up began with the CARLISLE®️ ALUTRIX® vapour control layer, followed by tapered fire-retardant rockwool insulation, and the ARBOFLEX® Liquid Carrier Membrane, prior to application of the ARBOFLEX® PU liquid-applied waterproofing.
Roofing contractor, T&T Roofing Limited, rollered the ARBOFLEX®️ PU system onto the roof surface, and the system’s glass fibre matting was laid onto the wet roof covering. A clean roller was then used to draw the liquid through the mesh, verifying that the correct amount of liquid had been applied and ensuring a seamless surface once the liquid-applied system had cured. The U/V resistant top coat was then applied to achieve the BBA-accredited 20 year warranty. A single-component aliphatic resin that protects against UV rays, the ARBOFLEX® PU Top Coat creates a flexible, seamless layer in a satin finish, with excellent adhesion and mechanical properties. In addition to protecting against UV rays, the Top Coat also provides resistance to abrasion, stress, weathering and temperature variations, with excellent adhesion and mechanical properties.
For the upstands, parapet walls and vertical surfaces of the planters in the communal outdoor areas, the T&T Roofing Limited team added ARBOFLEX® Thickener to the ARBOFLEX® PU system, providing thixotropic properties for excellent coverage of the vertical surfaces.
Quality assurance
Following completion of each roof area, the T&T Roofing Limited team used leak detection technology to check the integrity of the installation. The equipment passed electrical current into the roof build-up, which would trigger an alarm if any water ingress were to be detected. The ARBOFLEX® PU waterproofing system used includes a conductive backing in the form of a foil-faced carrier membrane and vapour control layer, allowing testing for pinholes and porosity in this way using a high-voltage Holliday detector.
Further quality assurance for the installation was underpinned by the collaborative relationship between CARLISLE® and the contractor, with on-site training in the use of the ARBOFLEX® PU system provided by CARLISLE®️, along with regular technical inspections.