If the balcony membrane has deteriorated and failed, then re-grouting and surface sealing is not a permanent waterproofing solution. Rip up and start over again to properly address and repair the underlying problem. Our suggested solutions for a leaking balcony repair: Image: Concrete stalactites and stalagmites formed on the balcony. Drummy / Popping / Tenting / Buckled up tiles.The water stains may be seen on the external walls/building facade.Excessive calcium stains (Efflorescence).This will allow for movement during thermal changes. The joints should be installed every 3 meters and around the perimeter of the balcony. Planter boxes and pots can add to the breakdown of the waterproofing membrane by exposure to chemicals from fertilisers, which can become concentrated as evaporation occurs.Īdequate control joints are essential to decrease the risk of the tiles moving up against each other and popping – possibly breaking the adhesive and waterproofing membrane. Consequently, the choice of waterproofing product, installation and tile adhesive has a significant effect. If you can see water pooling on the balcony and it is taking a longer time than reasonable to dry and drain away, it is most likely due to incorrect fall and /or inadequate drainage.Ĭorrect waterproofing membrane under the tiles is essential because most membranes are not designed to hold water between the membrane and the tiles.
The same goes for highly water-absorbent permeable tiles, such as terracotta tiles.īalconies in multi-level apartment buildings have a tendency to have minimal falls to the substrate and inadequate subfloor drainage. The colour of the tiles plays a role because darker tiles expand more than light-coloured tiles. Tiled balconies are subject to UV and heat, causing expansion of tiles which in turn compresses the expansion joints available. Tiled balconies, podiums and roof decks (referred to as balconies in this document from here on) are susceptible to thermal stresses as they are constantly exposed to the elements and the sudden transition between cooler temperatures to the temperatures of a scorching summer’s day. Tiled balconies, podiums and roof decks are especially exposed to the destructive forces of the elements such as rain, wind, sunlight and cold conditions.Īll buildings go through thermal expansion and contraction with shifting temperature levels. Sudden and significant thermal changes may cause stress on building materials. Swinging temperatures affecting building materials
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