Why Waterproofing Variations Blow Out - And How QS Clarity Prevents It

The Common Scenario

You start a waterproofing job thinking the scope is clear. Then halfway through, the builder asks for:

• extra prep

• additional layers

• changed membrane type

• detail flashing not originally included
  
  

Suddenly the job expands - but the price doesn’t. Most waterproofers face this weekly.

QS Insight: Variations Happen Because the Scope Isn’t Defended Early

A QS mindset protects installers before work begins.
Here’s how:

1. Knowing What’s Excluded Is More Important Than What’s Included

Prep, substrate correction, curing time, access issues - if it’s not listed, it becomes your problem.

2. Variations Need Documentation, Not Verbal Approvals

QS workflow ensures you have proof, timestamps, and clear justification.

3. System Changes = Cost Changes

When architects or builders switch membrane systems, a QS identifies the impact instantly - saving installers from absorbing extra cost.

4. Site Conditions Decide the Real Scope

A QS spots risk areas early: damp substrates, uneven falls, detail complexity, or sequencing issues.

Simple Solution: Lock in Scope Before Day One

You don’t need complicated systems - just a stronger pre-start routine:

• Review plans with a QS mindset

• Confirm what’s included and what’s not

• Photograph site conditions

• Flag potential variations before touching substrate

• Get builder/PM sign-off early

• Keep everything documented
  
  

Small steps prevent the big blowouts.

Protect Your Margin Before You Start

AQUOSYNC helps NZ & AU waterproofers build variation-proof scopes with clear takeoffs, documented exclusions, and clean workflows that avoid mid-project surprises.
👉 Message us if you want better control over your next project.