What is a Wet Area within a residential building?

An area within a residential building includes the bathrooms, shower, laundry, toilet, powder room and sauna. Does not include kitchens and bar areas.


What is a waterproof system?

It’s a combination of elements, (ie: hob, angle, waterproof membrane, sealants, fall/slope of tiles, shower screen), that are needed to achieve a waterproof barrier which will control the flow of water into a floor waste.


What does Water Resistant mean?

It’s the materials (tiles, wall paint, sealant) used to help restrict water penetrating through to the wall or floor but is NOT WATERPROOF. It will waterproof an area but will help small amounts of water from escaping through some gaps between the vanity area or top of a wash basin


What does it mean to Waterproof?

It’s a waterproof membrane or material that protects walls or floors from water damage and does not let moisture penetrate through it.


What is a Water stop?

It’s a physical barrier used to help prevent water or moisture passing through to the outside floor or walls and helps contain water in one area. (ie: an aluminum angle or hob)


How important is the fall and slope of tiles into the floor waste?

Falls in Floor Finishes:
The falls into the floor waste should be steep enough to allow all surface water to drain quickly without any water pooling on the surface.
Shower Floors:
It’s absolutely CRITICAL that the FALL in all SHOWER BASE should be steep enough to prevent water from pooling and settling on top the shower base which will also preventing water from escaping outside the shower area.


Do I need to waterproof Penetrations?

All penetrations for taps, shower nozzles and anything similar should be waterproofed by sealing with proprietary flange systems or silicon sealant. When waterproofing or sealing the tap body to the wall, all taps should be positioned in a way so the removal and replacing of the washer can be done easily without damaging the waterproof seal. All penetrations should be waterproofed.
Horizontal Penetrations:
All tap penetrations on horizontal surfaces for baths, spas and vanity basins must be waterproofed by sealing with a proprietary flange system or by sealing around the tap body.


When is my job ready for waterproofing?

  • The planning and designing stage

When planning or designing a bathroom, balcony or water feature, we strongly advise the consultation with a qualified Waterproofing specialist or someone with a great knowledge and understanding of implementing correct WATERPROOFING SYSTEMS. Choose either a representative from ACT Waterproofing or Jerry Howard from MBA ACT, for any advice on safe practices and the best products for your job. Too often jobs have been designed with no safe waterproofing system plan, which will lead to failure and expensive repairs. With the right planning, your job will right the FIRST time.



  • Substrate:


ACT Waterproofing expects that the Substrate Surface Preparation before application of our waterproof membrane should be CLEAN and DUST FREE. There should be no sharp or large lumps on the surface and any imperfections of the substrate should be minimal and self leveled or cement patched where needed.


  • Sheeting/10 mm gaps

All bathroom wall sheets or waterproof plasterboard sheets must have a gap no more than 10 mm. This is so the bond break used to handle the pressure of movement in the house is not pushed to breaking point which can lead to cracking and failure of the membrane.


  • Showers Marked

To save the expensive task of ripping up freshly laid tiles and new shower screens, all showers must be DISCUSSED and MARKED out BEFORE we commence work, so there is absolutely no confusion with the shower sizes.


  • Angle Colour

We will cut, set and mechanically fasten an aluminium angle to the floor to serve as a water stop. Angles are more widely used now because it’s not such a high step into the shower, unlike the old brick pavers that were used previously. We supply angles that are 50mm high, 40mm high and 32mm high. After completion of tiling and the shower screen has been installed, the top part of the angle facing outside the shower will be exposed 25mm down to 5mm depending on the height of the angle. The shower screen will butt up against the inside of the angle. The color of the angle is important so that it will make the perfect match with the shower screen. The most popular colors include Bright Clear Chrome, Satin Chrome and White. Other color’s available are Birch (off white) and Almond Ivory.


  • Plasterers

All plaster work and cornicing must be fully cured and completed before waterproofing commences so that the membrane is going onto a dry and solid surface.


  • Protection

To ensure that the membrane is not damaged before and during tiling, all work that is carried out on top of the membrane must be on a protective sheeting or covering (ie: drop sheet, protective board). No sharp objects, stools, cutting benches, ladders, cigarettes or rubbish should come in contact with the membrane.


  • Concrete

Before applying any membrane to a concrete surface that’s been freshly poured it’s crucial that the CONCRETE is given time to FULLY CURE otherwise the membrane will not ADHERE to the surface properly and the MEMBRANE will not be given the best possible chance to CURE.


What areas do I need to waterproof?


To achieve the maximum protection in all wet areas we recommend waterproofing in the following areas.


-Bathroom/Timber Floor:

-Full floor
-Floor waste
-Floor joints between floor sheets
-Spa and Bath flashings


-Bathroom/Concrete Floor:

-Perimeter edges
-Floor waste
-Spa and Bath flashings



-Full floor
-Vertical corners
-Recessed soap holders
-Built in seat
-Built in foot stool
-Full walls


-Laundry/Timber or Concrete Floor:

-Full floor


-Toilet/Timber Floor:

-Full floor


-Toilet/Concrete Floor:

-Perimeter edges


Rubber sheet membranes and Liquid membranes, which to use?


Each job is different and we would always find the best product for your job, these are some of the benefits of Rubber and Liquid.


- Rubber products and it’s benefits:


* Rubber sheets are a FULLY CURED membrane that carries 20 YEARS FACTORY WARRANTY when used on exposed commercial roofs.
* Very TOUGH membrane to puncture and tear and will handle any amount of MOVEMENT a typical house or building will give.
* No need for CURE TIME.
* It can be tiled on the SAME DAY.
* It can be exposed to UV.


- Liquid membranes and it’s benefits:


* Can be used on most uneven surfaces.
* Select Liquid membranes can be exposed to UV.
* When fully cured it will be one complete membrane.
* Will handle movement of a typical house or building.
* Carries Industry Standard warranty, 7 years.


When can I tile?


  • Emerproof-750: After 24 hrs of 2nd coat.
  • Emerproof-750: (When membrane is to be used outdoors; Balcony) Membrane MUST be TILED or cover with CEMENT BED after 24 hrs of 2nd coat and BEFORE 48 hrs from 2nd coat
  • Rubber membrane: 24 hrs after job is completed or if on the same day must be 3 hrs after job is completed.
  • If you are unsure, please always CHECK with US.


How much notice do you need for bookings?


  • Planning is essential when booking waterproofing jobs so to give the best chance for us to:
  • Do the job properly
  • Allow the right amount of time for membrane to cure
  • And to allowing for any unforseen problems with the Job preparation, (rough floor, surface too wet, special requests).

We STRONGLY advise at least ONE WEEK’S notice


Are you a licensed Applicator?


          - YES         License no:


What kind of warranty do you offer?


  • Industry standard:

Work that is carried out to Industry standards will receive a 7 Year warranty for products.


  • ACT W/P 20 year warranty:

Provided your job meets our high standards, from planning to preparation, we are so confident in our rubber sheet membranes that we’ll offer a 20 Year warranty