Commercial Roofing
Apartment Building Roofing and Waterproofing Sydney
Flat-roof and podium waterproofing that keeps a full apartment block dry.
Apartment buildings rarely have a simple pitched roof. You are usually dealing with flat membrane roofs, internal box gutters, plant decks, planter boxes and podium areas over habitable space below. A failure here does not drip into an attic; it runs straight into someone's living room. We specialise in the waterproofing systems that keep multi-storey Sydney blocks dry, and in doing the work without shutting the building down.
Flat-roof membranes and box gutters
Most apartment leaks trace back to a tired membrane or an undersized, blocked box gutter. We assess whether a membrane can be overlaid or needs full removal, check falls to outlets, and confirm box gutters can carry a Sydney downpour with the overflow provisions the Standards require. Ponding water is the enemy, so getting the falls and drainage right matters more than the topcoat colour.
Where a roof also carries air-conditioning plant, we detail around penetrations and walkways so foot traffic does not puncture the very membrane it is meant to protect.
Podium and planter-box waterproofing
Podiums, terraces and planter boxes sit over apartments and car parks, so their waterproofing is roofing by another name. These are common failure points because tiling, soil and paving hide the membrane and the leak by the time it shows. We can lift finishes, repair or replace the membrane, and reinstate so the deck works as designed rather than as a slow-motion leak.
Crane lifts, access and resident notice
Getting materials onto a multi-storey roof usually means a crane lift or hoist, a traffic-managed street closure, and careful timing. We plan lifts to minimise the hours a driveway or footpath is affected and give the strata manager and residents clear notice. Internal access to top-floor apartments, where needed to trace a leak, is arranged in writing and by appointment.
What's Included
- Membrane assessment: overlay versus full replacement, with falls checked
- Box gutter sizing and overflow provisions to suit heavy Sydney rain
- Detailing around plant, penetrations and rooftop walkways
- Podium, terrace and planter-box waterproofing with reinstatement
- Crane-lift and hoist logistics with traffic management
- Written resident and strata-manager notice before disruptive works
Frequently Asked Questions
Why does our top-floor apartment keep leaking after rain?
On apartment blocks it is usually the flat-roof membrane failing or a box gutter that is undersized, blocked or ponding water. We check the falls, outlets and overflows rather than just chasing the wet patch, because the entry point is often metres from where it appears inside.
Can you waterproof a podium or terrace over the car park?
Yes. Podiums and terraces are roofing over habitable space, so we treat them the same way. We can lift tiling or paving, repair or replace the membrane beneath, and reinstate the finish so the deck stops leaking into the levels below.
How do you get materials up to a multi-storey roof?
Usually by crane lift or hoist with a traffic-managed street closure. We plan the lift to keep any driveway or footpath closure as short as possible and give the strata manager and residents advance notice so the day runs smoothly.
Do you need to enter apartments to fix a roof leak?
Sometimes, to trace where water is tracking or to repair a ceiling. Any internal access is arranged in writing and by appointment through the strata manager. Most of the actual roofing work, though, happens on the roof without entering anyone's home.
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