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Balcony Waterproofing
in Paarl

Balcony waterproofing in Paarl comes down to the step at the door, the turn-ups at the walls and the outlet, all hidden under tiles. We find where the water gets under, then quote a repair that deals with the membrane.

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A tiled balcony floor meeting a tiled parapet wall, with a railing on top
  1. Where the floor tiles meet the wall
  2. The inside corner, where two turn-ups meet

Sealant over the grout does not fix a balcony leak

When a damp patch appears below a balcony, a clear sealer over the tiles and grout is the tempting fix. It can slow things down for a season. It does not reach the membrane under the tiles, which is what keeps a balcony’s water out, and it does not repair a membrane that has been damaged or cut short.

A balcony is a small flat roof with a door in it. The membrane has to run under the tiles, up the walls, over the edge and into the outlet without a break, and it has to keep water away from the door. If any of that is wrong, no surface treatment will put it right.

The step at the door and the turn-up at the wall

SANS 10400-L requires a suitable step between inside and outside to stop water getting into a building. A balcony tiled up to the level of the lounge floor or the sliding door track has lost it, and rain pools against the door.

Where the membrane meets a wall, the standard wants the turn-up counter-flashed and cut into the masonry, with a damp-proof course level with its top. A membrane that stops at the skirting tile leaves a gap behind the wall tiles. The panel lists the other balcony rules, for outlets and pipes.

In Paarl the test is winter. Rain-bearing winds in the south-western Cape peak from the north-west, so a balcony facing that way takes rain driven at its door and walls through the May to September fronts. Tiles hide every one of these details, which is why a damp patch below is often the first sign.

The membrane and its edges should be inspected before tiles go down. Once tiled over, nobody can see them.

Sources: SANS 10400-L:2011; DWAF Berg catchment rainfall report, 2007; ERA5 rainfall split, 1996 to 2025.

What we check on a leaking balcony

Six places, starting at the door.

  1. The door threshold

    The height of the step, the sill and the sliding door track, and whether water stands against them.

  2. Falls

    Which way the water runs. A balcony that slopes towards the house sends water to the door.

  3. Turn-ups at the walls

    How high the membrane runs, whether it is tucked in, and what the wall tiles are hiding.

  4. The outlet or spout

    Its size and position, and whether the membrane is dressed into it or stops short.

  5. The edge

    Drips, balustrade fixings and the joint where the slab meets the edge tile.

  6. The membrane itself

    Under a lifted tile or two: whether it is intact and bonded, and whether it was protected before tiling.

What you can hold us to on a balcony

Each one is written into the quote, so you can check it.

  • Tiles lifted only where the evidence points

    Opening up is kept to what is needed to see the membrane and its edges.

  • The membrane checked before re-tiling

    Nothing is tiled over until the membrane and its turn-ups have been inspected.

  • Threshold, turn-ups and outlet on the quote

    All three are dealt with by name, not left out because the tiles hide them.

How a balcony repair runs

Tiles come up only where the evidence points.

  1. Look and trace

    Falls, threshold, outlet and edges checked, and the damp patch below traced back.

  2. Open up

    A few tiles lifted where needed to see the membrane and its edges.

  3. Written quote

    A local repair or a new membrane, with the tiling listed separately.

  4. Repair and re-tile

    The membrane repaired or replaced, protected, and inspected before tiles go down.

How balcony waterproofing is priced

Two balconies that look alike can need very different work.

What the written quote lists

  • Lifting and disposing of tiles and screed, where needed
  • Repairs to the slab and the falls
  • The membrane, its turn-ups and the outlet
  • Protection over the membrane before tiling
  • Re-tiling, or a tile-free finish if you prefer one

What moves the number

  • Whether a local repair is enough or the whole membrane goes
  • The size of the balcony and how many walls it meets
  • Access, such as a first-floor balcony reached through the house
  • The door threshold, if the step has to be rebuilt

If a quote does not mention the threshold, the turn-ups or the outlet, ask how they will be dealt with.

Tiles, doors and the damp patch below, explained

About tiles, doors and the damp patch below.

How much does balcony waterproofing cost in Paarl?

It depends on whether the membrane can be repaired locally or has to be replaced, which means lifting all the tiles. The size, the number of walls and the access count too. We look, and lift a tile where needed, before quoting.

Can a balcony be waterproofed without lifting the tiles?

Sealers for tiles and grout exist, but they do not repair the membrane underneath or fix a threshold with no step. They suit a sound balcony as maintenance, not a leaking one.

Why is water coming in under my sliding door?

Usually the balcony has no step, falls towards the door, or the membrane does not run under the door track. SANS 10400-L requires a step between internal and external areas to keep water out.

Can tiles be laid straight onto torch-on?

Tiling directly onto a membrane risks damaging it, and once it is tiled nobody can inspect it. The membrane needs protecting before the tiles go down.

Why is the ceiling under my balcony damp only after heavy rain?

Because water is getting past the membrane somewhere, often at a turn-up, the outlet or a crack at the edge, and only reaches the ceiling when there is enough of it. Balconies facing north-west take the most wind-driven rain in winter fronts.

Which way should a balcony slope?

Away from the door, towards an outlet or the edge. SANS 10400-L asks for at least 1:80 on flat roofs, and a balcony is a flat roof with tiles on it.

Can a balcony leak cause damp in the wall below?

Yes. Water that gets under the tiles can run along the slab and into the wall beneath, so damp on a ground-floor wall under a balcony often starts above it.

Is a roof terrace different from a balcony?

Not in principle. Both are flat roofs that people walk on. A terrace over a living room carries more risk if it fails, so its membrane, falls and outlets deserve the same care as a roof.

Related work above and below

A balcony shares its problems with the roof and the wall beneath it.

Back to Waterproofing Paarl for roofs, gutters and damp.

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Tell us where the damp shows and which way the balcony faces.

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Balconies across Paarl

Balconies and roof terraces on homes across Paarl.

  • Paarl and its suburbs, in the Drakenstein Municipality
  • Amstelhof
  • Bella Vista
  • Bertville
  • Boschenmeer Golf Estate
  • Charleston Hill
  • Courtrai
  • Dalvale
  • De Zoete Inval
  • Denneburg
  • Esterville
  • Groenheuwel
  • Groenvlei
  • Klein Nederburg
  • Klein Parys
  • Lemoenkloof
  • Mbekweni
  • New Orleans
  • Northern Paarl
  • Southern Paarl
  • Val de Vie
  • Vlakkeland
  • Vrykyk