Worker applies bitumen mastic on the foundation

Balcony Waterproofing: What You Need to Know

Posted on 2018-11-30

It’s raining again. Your sopping, slippery balcony has transformed an average downpour into a long-running nightmare – when it rains, it pools; when it pools, it crumbles and when it crumbles, the sealant goes to hell and don’t even mention the joints. When you first moved in, the condition report wasn’t too bad – a chip here, a crack there, small stuff. And today? Leaking balcony tiles. Mould, decay and the sickening stench of an inner damp lingers despite your best efforts. Your balcony waterproofing membrane is virtually non-existent.

The good news? Some balcony waterproofing can save you grief, money and damage caused by leaks. But what do you look for? Where do you start? Megasealed have you covered.


Australians love their renovation projects. We’re certainly a resourceful lot. While the Megasealed team embrace the DIY philosophy, there are some projects that shouldn’t be attempted lightly – one of them being, waterproofing your balcony floor. One small mistake may not seem like a big deal now, but waterproofing issues don’t crop up straight away and are often invisible to the untrained eye. A trained Megasealed technician will apply the latest balcony waterproofing products to ensure stringent balcony waterproofing standards are met from day dot. Meaning? You save coin in the long-run.

Spotting the Slip-Up

Too often builders negelect basic waterproofing standards, cut corners and therefore their work is inherently flawed. With this said, balcony damage is probably not your fault – especially if you’re renting. Home owners may have inherited an already problematic balcony from the moment they signed the dotted line. When a builder slaps together a house or contributes to an apartment, they sometimes build the balcony first and place the door afterward, installing the membrane as a last step. This is a serious floor/wall junction problem. Australian standards are supposed to stop this from happening, but a lack of design detail means the builder will fall back on old, incorrect practices. It’s not malicious, they just don’t know any better.

What’s Your Angle?

While we’re down on the floor, take a look at your balcony – does it gently slope toward a central drain? Are the water barriers and grouting in good condition? If you answered no twice, you’re in trouble. If a balcony isn’t draining properly, an extensive re-tile may be worth considering – sure, it’s expensive, but water ingress isn’t like a seasonal virus, it won’t pick up and leave once the rain stops.

Don’t Hold Back

A waterproofing membrane is essential to keeping your outdoor area in prime condition – think of it as a raincoat for your balcony. You don’t like being wet, you hate damp clothes and the smell of mildew doesn’t really scream homely and comfortable, so tackling balcony leaks as soon as possible will make your days (and nights) a whole lot sweeter. Contacting Megasealed and taking advantage of our wide range of balcony waterproofing solutions will soon put a smile on your face – our services are lighter on the wallet in the long term and come loaded with insider knowledge to help you maintain your freshly sealed balcony.