Mould keeps coming back when only the surface is cleaned. We find the water causing it, remove mould-affected linings and materials, fix the leak, damp or ventilation problem, and rebuild so it stays dry.
Mould needs moisture to grow. In Sydney buildings that moisture usually comes from one of three places: water getting in through roofs, balconies, windows, walls or plumbing; rising or penetrating damp in masonry; or condensation from poor ventilation in bathrooms, laundries, wardrobes and subfloors.
Wiping or spraying mould off a surface treats the symptom. If the wall behind is wet, the plasterboard is saturated or the subfloor is damp, the mould grows back, often inside the wall where you cannot see it.
Mould remediation is building work: find the moisture source with inspection and moisture readings, remove the mould-affected materials, repair the leak or damp, improve ventilation where needed, and rebuild with materials suited to the area.
If any of these sound familiar, it is worth a free site visit. We will tell you straight what your site needs.
Patches that come back within weeks of cleaning point to moisture in the building, not just the surface.
A persistent damp, earthy smell, often stronger in wardrobes, cupboards and closed rooms.
Water stains, blistering paint or soft plasterboard on walls and ceilings.
Growth at ceiling corners, behind furniture or along the base of walls.
Wet soil, timber decay or mould in the subfloor of older homes.
Mould in apartments below balconies, roofs and bathrooms is usually a waterproofing failure.
Mould keeps coming back? Send us photos and tell us where it is, and we will tell you where the water is likely coming from.
We fix the building problem behind the mould and work alongside hygienists where testing or clearance is required.
Inspection, moisture readings and, where needed, opening up walls and ceilings to find the source of the water.
Mould-affected plasterboard, linings, carpet underlay and timber removed with containment to limit spread.
Balcony, roof, bathroom, window and facade leaks repaired so water stops reaching the area.
Damp proof courses, drainage and masonry repairs where moisture is coming through the walls.
Exhaust fans ducted outside, subfloor ventilation and airflow improvements to control condensation.
New linings, moisture-resistant materials, waterproofing and finishes so the area is restored.
A selection of recent mould remediation projects across Sydney.
View all projects
Every mould remediation job follows the same five steps, from diagnosis to documented handover.
We attend site, inspect the defect and its surroundings, and identify the cause rather than just the symptom. Where needed we take photos, moisture readings and cover measurements.
We coordinate a remedial or structural engineer where required and agree a written scope of works that fixes the cause, not only the visible damage.
You receive a clear, itemised written quote with methodology, materials, access, programme and any approvals. No vague lump sums.
Our crew carries out the work to the engineer's specification and Australian Standards, with progress photos and hold-point inspections at each critical stage.
Final inspection, clean-up and a handover pack: photos, product data, engineer sign-off where applicable, and your statutory warranty under the Home Building Act 1989.
Photos of the source, the removal and the repair, so owners, strata committees and tenants can see the problem has been dealt with properly.
Cleaning companies treat surfaces. As a licensed, DBP registered remedial builder, we fix the leaks, damp and building defects that cause mould in the first place.
We diagnose why the defect happened. Patching over the symptom is why so many repairs fail twice.
DBP General Unrestricted (BUP4254812). Qualified for Class 2 apartment remedial work under the Design and Building Practitioners Act 2020.
Builder Licence 384697C, $20M public liability, workers compensation and HBCF cover where required.
We work with remedial and structural engineers from diagnosis to sign-off, so the fix is designed, not guessed.
Photos, product data, hold-point records and certification. Exactly what strata committees, insurers and buyers ask for.
Hands-on remedial and heritage work across Sydney since the 1970s, including jobs other builders turned down.
Real reviews from homeowners, strata and builders.
I couldn't be more pleased that I found Constatine and his team to assist our strata building with landscaping, waterproofing, and concrete cancer repairs. He was knowledgeable, reliable, patient, and deeply committed to achieving the best result for everyone involved. I am 100% confident that the work completed will stand the test of time. He will absolutely be my go-to moving forward, and I have no doubt we will work together again.
Constatine and his team did an excellent job repairing and waterproofing our garage ceiling and walls, which had been affected by concrete cancer and sandstone erosion. Constatine is highly experienced in remedial works and provided clear advice, transparent costings, and recommended the best products available to ensure a long-lasting result. We highly recommend METCON for specialist remedial works.
Excellent communication throughout. Constatine and his team were able to assist us immediately on an urgent government project, improved the plans we already had, and provided multiple options to suit our needs. Highly recommended.
Straight answers from the builder. Anything else, just ask.
Mould removal usually means cleaning visible mould from surfaces. Mould remediation deals with the cause: finding and fixing the water, removing mould-affected building materials and rebuilding, so the mould does not come back.
Because the moisture feeding it is still there. A leak, rising damp or condensation from poor ventilation will keep the area damp until the building problem is fixed.
It depends on the cause. Leaks from common property such as balconies, roofs and external walls are usually the owners corporation's responsibility. Condensation from how a unit is used may be the occupant's. We can inspect and report on the likely source.
We investigate and fix the building causes. Where air testing or clearance testing is required, we work alongside independent occupational hygienists.
Remedial problems rarely come alone. Leaks cause concrete cancer, damp causes render failure. We fix the whole chain.
Back to Remedial BuildingPlain-language guides from our team on the questions we are asked most.
Houses, terraces, apartments and strata buildings across Sydney, from the Eastern Suburbs and Inner West to the North Shore and Northern Beaches.
A few photos and a description of where the mould is and how long it has been there is enough for an initial view.
