Parramatta, NSW

Rectifying existing waterproofing membrane

Inspect and investigate the existing conditions of the waterproofing membrane along the two rooftops, common areas, & nominated units.

The Problem

We are instructed by Michael Antonakiou to attend the site 13-21 Great Western Highway, Paramatta NSW, to carry out a non-invasive investigation and produce a written technical report.

This report is based visual sightings & readings taken by the technicians throughout the duration of the inspection.

Our Investigation

High mould presence throughout ceiling of unit 28

Unit 28 bathroom – as per living room, signs of high mould/water egress damages to ceilings/cornicing

Water egress damages along balcony of unit 28 due to possible roof tile leaks causing mould to soffit ceilings. Noticed several wildlife presences on property. No measures identified preventing bird wildlife.

High mould presence throughout ceiling of unit 29

Along the western elevation corner, we had identified delaminated areas of the membrane which only consists of 500 microns, less than the required application film thickness.

High levels of water ponding along both rooftops location throughout several locations. Ponding appears to be occurring mainly along the middle (approx. 7.6m average ) from nearest drains

After attempting to conduct water test from the rooftop outlet, we quickly identified flooring cracks that can possibly cause further water ingress. On the following day, we had identified several fall failures along the flat sections of rooftops.

High levels of black mould, efflorescence and moisture ingress along parapet capping’s, vertical cracking along concrete slab.

Several cracks appear to have been filled with a UV solvent membrane which hasn’t prevented the cracks from expanding. All cracks appear to be nonstructural from our site observations & light hammer testing.

All termination flashings appear to require removal/replacement. Several locations of the flashing only regulated into the parapet walls < 5mm, < 8mm & 10mm. minimal insert is required to contain a 15mm with a flexible mastic overlay.

Several locations of the parapet wall capping appear to have several mould decays due to lack of maintenance of the substrates. Regular cleaning of roof is required.

4 outlet drains along both rooftops had a buildup of debris possibly causing future blockages. We unblocked the drains at the time of inspections; thus, committee is required to nominate contractor for periodic maintenance.

No items found.

Findings

After conducting visual inspection for (4) independent events, several building defects evidentially require rectifications. Both rooftops require a remediation membrane system by removing the existing membrane & installing a sufficient new membrane UV system. All cracks require a polyurethane injection along with new installation of a mechanical seal for parapet terminations. Falls to be corrected with leveling compound as best achievable as possible. Parapet capping’s to be installed using a Colorbond trim to protect masonry from any future ingress, along with the installation of an elastomeric paint system on remaining walls.
We advise the following additions to be repaired:

Weekly/fortnightly tree debris clean & maintenance to prevent blocked drains
Installation of gutter guards or drainage mesh along drains
All brick parapets to be rectified by elastomeric paint scheme, & colour capping flashings
All flashings along adjacent post rooftops to be replaced with pressurised flashings/seals.
Bird wildlife prevention methods to be installed to prevent future decay of any timber trims/linings

Suggested Solutions

Brick Parapet repairs

All parapets inspected contain high mould, efflorescence, and vegetation, which illustrates high levels of absorption. The installation of a colourbond capping is highly required as further moisture will continue to track too the below structures causing delamination, moisture ingress, deflection of substrates.

Roofing flashing repairs:

All unit separate rooftops contain only adhered flashings not recessed brickwork flashing systems. All flashings are required to be replaced with parapet flashings or overlapped flashing recessed into brickwork.
All areas to be pressure cleaned, filled with a polyurethane mastic along joints, coated with a (2) part epoxy based priming agent such as ARDEX WPM 300. 3 Coats of WPM 310 which is suitable for all concrete external substrates. Re-coating scheme to be conducted per 7-8 years. Installation of a mechanically fixed pressure seal to be installed along the Fibre cement lining with a 100mm turn up.

‍

Repellendus est officiis dolores consequuntur ut et cumque officia non. Cumque occaecati id vel voluptatem sit totam doloru

Testimonial name, Company

OUR CASE STUDIES

We are proud of the work we do.

Leak detection investigation for Hotel

Performing special diagnostic and identifying water ingress with concrete cancer in a hotel building.

Read case study

Residential leak detection & remedial waterproofing

To inspect and investigate the existing conditions of the waterproofing membrane along the balconies, common areas, building perimeters & to provide a solution for the consistent leaks throughout numerous units.

Read case study