Roof inspection
Assessing the existing membrane, drainage, penetrations and problem areas to establish the scope.
Rooftop Waterproofing
Rooftop Waterproofing Sydney
Flat and low-pitch roof membranes, upstand and parapet detailing, and rooftop leak repairs.
A flat or low-pitch roof relies almost entirely on its waterproofing membrane. There is no steep fall to shed water quickly, so the membrane and the drainage design have to handle sustained wetting, ponding during storms and constant UV and thermal cycling. Diamond Seal Waterproofing waterproofs rooftops across Sydney for residential, commercial and strata buildings.
Rooftop waterproofing also has to accommodate everything mounted on the roof — air conditioning plant, pipe penetrations, vents, hatches, parapets and expansion joints. Each of those is a potential entry point, and each needs to be detailed as part of the membrane system rather than treated as an afterthought.
Rooftop leaks after heavy rain
Roof leaks often appear well away from their source. Water enters at a failed detail, travels along the slab or between layers, and emerges at the nearest low point or ceiling penetration — sometimes rooms away.
That is why rooftop leak repair starts with looking at how the whole roof works: where water collects, whether outlets are clear and correctly sized, how the membrane terminates at parapets and upstands, and whether penetrations have been sealed into the system properly.
What rooftop waterproofing involves
Surface preparation
Cleaning, removing failed coatings, treating cracks and preparing the concrete or existing substrate.
Drainage review
Checking outlets, sumps and falls so water is directed off the roof rather than pooling.
Detail work
Upstands, parapet cappings, expansion joints, plant plinths, vents and pipe penetrations detailed and reinforced.
Membrane application
Applying a roof membrane system appropriate to the substrate, exposure and use of the roof.
Termination and finishing
Terminating the membrane correctly at edges and upstands so wind-driven rain cannot get behind it.
Rooftop applications
- Flat concrete roofs
- Low-pitch roofs and skillion sections
- Commercial and industrial roof areas
- Roof terraces and trafficable rooftops
- Plant areas and equipment plinths
- Parapet walls and box gutters
Benefits
Protects the building envelope
The roof is the building's first line of defence — a sound membrane protects everything below it.
Detail-driven scope
Penetrations, upstands and terminations are treated as central to the job.
Residential and commercial roofs
Work suited to a house extension roof or a larger commercial roof area.
Repair or full recoat
Targeted rooftop repairs where appropriate, or a full membrane replacement where the system has reached the end of its life.
Rooftop waterproofing problems
If any of these sound familiar, it is worth having the area assessed before the damage spreads further.
- Ceiling stains and drips after heavy rain
- Ponding water that never drains away
- Cracked, blistered or perished membrane
- Failed detailing around pipes, vents and plant
- Membrane not terminated correctly at parapets
- Blocked or undersized roof outlets
- Damage to the membrane from foot traffic and maintenance access
- Deteriorating flashings and cappings
Why choose Diamond Seal Waterproofing
- Rooftops assessed as a system, not as isolated patches
- Careful attention to penetrations and terminations
- Drainage considered alongside the membrane
- Suitable for residential, commercial and strata roofs
- Remedial rooftop waterproofing as well as new membranes
- Clear scope so you know exactly what is being done
Frequently asked questions
Have a question that isn't covered here? Call 0452 528 532 and we'll talk it through.
Related waterproofing services
Need Waterproofing in Sydney?
Talk to Diamond Seal Waterproofing about your residential, commercial or construction waterproofing requirements.