Membranes for Basements

May 15, 2018

 Case Study Video
Basements, Foundations & Retaining Walls

How to Repair Leaking Concrete Walls 


Case Study  - Video Below

Using Crack Injection method to fix water leaks permanently on shotcrete 

concrete wall in an underground car park.

Leaking Concrete Basement & Retaining Walls 

Basement Leak Repair in Melbourne

Water leaks from cracks in concrete retaining walls. 

Case Study  - Video Below


Concrete is both strong and inexpensive and is also one of the most durable man made building materials.


  • Concrete has one fundamental flaw: as it hardens, normal concrete becomes porous and behaves like a dense sponge.

  • Concrete contains excess water and as concrete hardens, this excess water leaves the concrete and creates a network of fine capillaries and internal pores.

  • Microscopically, there are a multitude of passages through the concrete. There are small cracks around the aggregates. There are small fissures in the concrete from the shrinking that occurs during it's curing stage. There are voids where the water in the original mix once was.

  • Concrete loves moisture - different mixes have different porosity, but under the right (or wrong) conditions, concrete acts like a giant sponge. It essentially becomes a “hard sponge” that allows water to bleed through the surface, causing damage to the concrete’s chemical composition and steel reinforcement.

  • And once cracks appear the process only worsens and the downward spiral begins.

  • More cracks mean more water intrusion, which results in faster deterioration.

About Findlay-Evans Waterproofing

Findlay-Evans are Registered Building Practitioners
specialising in waterproofing membranes.

Read Client Testimonials about Findlay-Evans
 Waterproofing Contractors in Melbourne - CLICK HERE

Using Liquid Spray-On Membranes 

  • In our experience, the most successful waterproofing product for concrete retaining walls to be applied at the stage of construction are Liquid Applied Membranes
  • These spray-on waterproof coatings are seamless and extremely flexible.  
  • Flexibility is an important property to permanently stop water leaks on any concrete wall. 
  • Flexibility allows the waterproof membrane to bridge across the concrete surface  - even if - or when - the concrete  cracks.
  • Elastomeric membranes will allow the waterproofing to move in conjunction with the concrete structure during normal thermal expansion and contraction.   
Below Ground Tanking Melbourne

Using Liquid Spray-On Membranes to waterproof basements and below ground foundations.

Find out about Findlay-Evans basement waterproofing method HERE 

Liquid Spray Applied Membranes

Basement -Waterproofing--Melbourne

Basement Waterproofing Using Liquid Rubber

Video Case Study  Below

Case Study - method  to waterproof concrete walls

  • The site cut was approximately a meter high - our waterproofing team concentrated on the base & footings of the basement wall.

  • The second waterproofing image shows our waterproofer finishing off the top of the retaining wall.

  • The waterproofing method involved spraying Liquid Rubber over the finished job.

  • As specialist waterproofing contractors, we spent a lot of time detailing the waterproofing product on the base of the foundation at the footing level.

  • Basement concrete slab footings often have penetrations through the slab.

  • This was below the concrete slab line, so we applied an extra heavy coating of liquid rubber membrane to seal all pipes & penetrations through the basement wall. 

Retaining wall preparation before waterproofing

Retaining wall preparation before waterproofing

Case Study - Waterproofing Cement Block Retaining Wall 

  • Top section of the concrete block basement wall was rendered & quite rough.
    The brick & cement block work was pre-rendered to provide a suitable surface for the waterproof membrane to be applied.

  • The Findlay-Evans Team completed the project by totally spraying over the entire surface with an application of Liquid Rubber product.

  • Waterproof membrane protection was provided with Arma-Blue.
    Protection sheet that is self-adhering and also provides an extra water protection barrier


Waterproofing Protection for Below Ground Tanking 

  • Waterproof membrane protection was provided with Arma-Blue.
    Protection sheet that is self-adhering and also provides an extra water protection barrier.

  • For cost savings, Arma-Blue protection sheet can be provided to the builder for installation.

  • The protection sheet is applied directly to the membrane.

  • This gives a robust & long-life membrane protection – especially during backfill which prevents the membrane from being damaged.

Retaining Wall Membranes

Waterproofing Protection for Retaining Walls

Benefits of Liquid Rubber Waterproofing

1. Saves time & cost as minimal surface preparation.

2.Environmentally friendly.

3.Non- toxic solvents so compatible with most products.

4.Puncture resistant.

5.Seamless, which means there are no seams and lapse to break and leak.

6. Robust adhesion & fully bonds.

7.Liquid Rubber doesn't have seams,so water can't travel underneath.

8.It's ozone and UV resistant.

Case Study - Waterproofing Protection 

Liquid Rubber Melbourne and Findlay-Evans Waterproofing.

Waterproofing Membranes - Project completed at Bega Cheese.  We were contracted to apply a Liquid Rubber Membrane to a chemical concrete bund area  used for storing, stacking and holding chemicals.

Waterproofing Preparation 

· First of all, by cleaning it thoroughly

· By power washing it

· And allowing it to dry

Once the primer was cured, we set about masking up all the intricate pipe work and areas that  didn't need to be sprayed.

This took quite some preparation - the crew set about preparing by hand and  detailed all the steel, concrete, cement shape.

Liquid Waterproofing for Concrete Protection 

Once that was done, we set up the purpose build special spray rig and sprayed the relevant areas of the bund that required waterproofing.

This was sprayed to 1.500 microns thick, coating, just to make sure that we had a good coating over the whole area.

Paul Evans - Manager/Director F.E.W Waterproofing

Paul Evans is a Registered Building Practitioner specialising in Liquid Applied Waterproofing Membranes & is the current Vice President of the Australian Institute of Waterproofing (AIW).

  • Registered Building Practitioner (RBP)
  • Member of Master Builders Association (MBAV)
  • Member of Australian Institute of Waterproofing (AIW)

Quality Waterproofing Products

As one project manager is quoted as saying:

"Build cheap, repair expensively”