Are Dincel Walls Waterproof? Conditions & Qualifications

The accurate answer is yes - but only within defined conditions and limits. “Waterproof” applies to specific Dincel wall products, installed in a specific way, and it does not automatically cover junctions, interfaces, or penetrations unless extra measures are taken.

This guide explains what that means, using the same requirements and constraints set out in the manufacturer’s waterproof wall conditions and qualifications.

What Dincel Means by “Select Dincel Products”

“Select Dincel Products” are Dincel products detailed in the Dincel Construction Manual that incorporate the patented snap lock joint.

This is the boundary of the waterproofing scope. Waterproof performance (as described in the conditions/qualifications) is tied to:

• the snap lock joint, and

• the Dincel Construction Manual detailing for those products.

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It also matters because waterproofing-related testing and representations in the document apply to Select Dincel Products only, not automatically to other Dincel products.

What Test Requirements Dincel Says Select Dincel Products Can Satisfy

The waterproof wall conditions reference several requirements and test methods. For anyone comparing walling systems, these are the key entities and standards commonly searched alongside “Dincel waterproof”:

BCA / NCC Referenced Requirements (as Listed by Dincel)

• BCA Volume 1 (Class 2 to Class 9): F3P1 and F2P2

• BCA Volume 2 (Class 1 and Class 10): H2P2 and H4P1

Other Standards Listed in the Document

• ASTM E 514-08: water penetration and leakage through masonry

• AS/NZS 4347.1:1995: damp-proof courses and flashings (Method 1: water permeability)

• ASTM E 96/M 96M-05: water vapour transmission of materials

  
  

AS3735 Liquid Tightness (Only in a Specific Scenario)

AS3735 liquid tightness is referenced only for a specific setup:

• a water tank constructed using Select Dincel Products, and

• the tank is additionally waterproofed at the base of the walls before testing, and

• testing is completed using the relevant AS3735 clause referenced.

Conditions Dincel Requires for the Waterproofing Statement to Apply

Waterproof performance is conditional on installation quality and compliance with the Construction Manual. In practice, this means the wall build must meet all the listed requirements below.

Installation Competency and Manual Compliance

• Installed by a competent dincel installation practitioner

• Installed in accordance with the Dincel Construction Manual, including the required use of snap lock joints and concrete as specified

The Specific Installation Conditions Listed by Dincel

The installation must ensure:

• No concrete voids

• The earth side of all Dincel products is not pierced or compromised

• Any penetration (including pipes/services) is appropriately waterproofed on the earth side

• Any Select Dincel Products cut vertically, or products not incorporating a snap lock joint, are sealed with a Dincel nominated waterproof bandage on the earth side

• No Dincel products are butt joined horizontally along the height of the wall

  
  

These points matter because they directly relate to water entry paths that show up on real builds: voids, penetrations, and joint/connection changes.

Qualifications and Limitations (What Is Not Automatically Waterproof)

This is the section many people miss when they search “are Dincel walls waterproof”.

Only Select Dincel Products Are Covered by the Testing/Representation

Only Select Dincel Products are included in the testing/representation scope described above. Other products are not automatically included.

Interfaces and Junctions Need Separate Measures

Even when the wall itself meets the conditions, interfaces are a separate issue.

The interface between Select Dincel Products and adjacent materials, surfaces, or products does not automatically meet the same waterproofing outcome unless additional measures are taken.

This applies specifically to joints between:

• the floor and the wall

• the roof slab and the wall

• any adjacent wall and the wall

In other words: if you’re relying on a “waterproof Dincel wall system”, you still need deliberate detailing at slab junctions and interfaces, and you should not assume these junctions are waterproof by default.

The Wall Must Be Designed to Protect the Snap Lock Joint

Structural and pressure-related loads matter. The wall must be designed to AS3600, taking into account:

• water pressure loads (current and potential future)

• backfill loads

• other lateral loads

The reason this is included is simple: deflection can compromise the snap lock joint, and that can affect waterproof performance.

Dincel Waterproof Walls: What Murs Projects Supplies and Installs

Murs Projects supplies and installs Dincel wall systems Australia-wide for builders and commercial projects that need a clear, controlled installation process.

If your project requires a waterproof outcome, our work starts before installation:

• confirming the wall scope aligns with Select Dincel Products (snap lock joint + construction Manual detailing)

• planning penetrations early so they can be treated correctly on the earth side

• avoiding detailing that introduces non–snap lock connections without the required treatment

• coordinating the slab and adjacent wall interfaces, because these are not “automatic waterproof” zones

• ensuring the wall design considers AS3600 load requirements so deflection does not compromise the snap lock joint

If you’re specifying Dincel and need an installation partner who understands the waterproof wall conditions, call Murs Projects. We’ll review the scope and come back with practical next steps and a clear quote - anywhere in Australia.