Tiled waterproof deck – water leaks

Cause

There is no waterproof membrane behind the tiles

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

The waterproof membrane was damaged during tiling 

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

The membrane was poorly applied

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

Tiles were applied before the liquid applied membrane had cured

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

Water is ponding on the surface and seeping thorough membrane joints

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

Grouted or sealant filed joints have failed

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

Tiles have been damaged

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required

Cause

The membrane was not designed to have tiles glued to it 

Repair

  • remove tiles, clean off substrate, replace any water-damaged framing, flooring or substrate, then rebuild the deck with a new membrane suitable for tiling over it. (Ensure that liquid applied membranes are applied to the correct thickness and allowed to cure.) Then install tiles and grout. Direct fixing of tiles to a waterproof membrane is outside the scope of Building Code Acceptable Solution E2/AS1
  • check in the rooms below the deck for mould or signs of water damage 
  • where it is suspected that the building may be leaking and there is a risk of damage, engage a building surveyor to report on the building and advise on repair/replacement options. A building consent will be required