Waterproofing Bathrooms and Wet Areas

Waterproofing Bathrooms, Laundry’s and kitchens are usually the wettest rooms in any house. Should these wet areas be not waterproofed correctly will cause structural damage to your building structure and even attract white ants which love damp areas. The data tells us that the average age of a bathroom is approximately 10 years before it’s renovated. In fact this makes it one of the most commonly renovated rooms in the house. Fortunately or unfortunately Australian Standards AS 3740 apply to any waterproofing used. The unfortunate part is that many standards represent only the minimum requirement for the treatment.
The following information is designed for practical advice to when you can use:


1. Drizoro Products

  1. Bonded  using Drizoro Maxseal Flex  A Coving using Drizoro Maxrest, (similar to a cornice)
  2. Drizoro Maxmesh embedded in Drizoro Maxseal Flex to strengthen the floor wall joint to protect against movement in the joint.
  3. Final coating of Drizoro Maxseal Flex



Typical Wet areas waterproofing for bathrooms where there are concrete and masonry surfaces

Drizoro cementitious products are ideally suited to the waterproofing of masonry or concrete surfaces.


2.Traditional Waterproofing Bathrooms and Wet Areas

Liquid sealants such as SealTuff – PU- WET AREAS are normally applied in a similar fashion to cementitious system or a 2 coat paint. A primer may be applied to the area first, then the first coat of SealTuff is applied from left to right (horizontally). The second coat is then to finished using up and down strokes (i.e. vertically), this helps to make sure any small/pin holes missed in the first coat are completely sealed. Flexible sealants are used around the bathroom where the bath and vanity units meet the walls, to prevent water doesn’t get behind them and cause premature damage.


  • Waterproofing products may take a few days to dry or cure, usually this is just a day or 2, check with supplier to make sure, so that you get the correct waterproof seal  –
  • Also these waterproof membranes shouldn’t be disturbed at all while they’re curing so make sure that plumbing works are largely completed prior to the wet areas waterproofing.
  • Tiling should started only after the waterproofing has completely cured

3. Repair of Bathrooms and wet areas

Normally renovation are a complete makeover and tiles, wall panels are replaced in this scenario the rule for new work apply

Repair of leaking bathrooms varies from bathroom to bathroom – the faults can be simple or complex – a little silicon is often used and solves the problem

In other cases replacement of mortar line with a waterproof mortar, ordinary mortar and clear sealant applied to the entire tiled area




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