Berwick Building
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Waterproofing inspection in Berwick

The membrane is all that stands between a shower and the timber around it, and it disappears under tiles within days.

  • Membrane applied and cured, tiler not yet started
  • About 1 hour on site
  • Report within 24 hours
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Fully licensed & accredited

Stage6 of 7
When to bookMembrane applied and cured, tiler not yet started
Time on siteAbout 1 hour on site
Inspected againstAS 3740 (waterproofing of domestic wet areas), AS 3958 (tiling), NCC Volume Two Part 10.2

What is included in a Berwick waterproofing inspection

  • Membrane coverage across the floor and up the walls
  • Wall upturn heights at the shower and against hobs
  • Hob, threshold and step-down details
  • Bond breakers at wall and floor junctions
  • Floor waste flange bedded and sealed to the membrane
  • Falls to the floor waste and shower screed
  • Penetrations for taps, wastes and shower rails sealed
  • Membrane cure, damage and coverage before tiling
  • Primer and substrate preparation where visible
  • Set-down depth against the finished floor level
  • Junctions to baths, screens and vanities
  • Laundry, powder room and ensuite treated to the same standard
Why it matters here

Waterproofing inspections on Berwick builds

Berwick membrane checks have found a void at the back of a shower niche, a puncture in a shower base and detailing that falls short of AS 3740:2021. All are minutes to fix before tiling and a demolition job after.

What we find at this stage in Berwick

  • Void in the membrane at a niche corner
  • Possible puncture in the shower base
  • Detailing short of the current standard
  • No bond breaker at a waste pipe
  • Puddle flanges sitting proud
Balcony puddle flange sitting proud instead of set into the floor sheet, found during a waterproofing inspection in Berwick
Balcony puddle flange sitting proud instead of set into the floor sheet
Sample findings

Sample defects found during our waterproofing inspections in Berwick

Annotated findings from Waterproofing inspections.

Gap in the membrane at the back corner of a shower niche, found during a waterproofing inspection in Berwick
Gap in the membrane at the back corner of a shower niche
Shower base membrane with what looks like a puncture through it, found during a waterproofing inspection in Berwick
Shower base membrane with what looks like a puncture through it
Wet area membrane detailing short of the current waterproofing standard, found during a waterproofing inspection in Berwick
Wet area membrane detailing short of the current waterproofing standard
Waste pipe through the membrane with no bandage or bond breaker, found during a waterproofing inspection in Berwick
Waste pipe through the membrane with no bandage or bond breaker

The other stages of a Berwick build

  1. Bored piers inspection in Berwick1Bored piersHoles bored and cages set, before any concrete
  2. Slab pre-pour inspection in Berwick2Slab pre-pourPre-pour, with pods, steel and formwork still open
  3. Frame inspection in Berwick3FrameFrame and trusses up, roof on, wraps not yet fitted
  4. Lock-up (pre-plaster) inspection in Berwick4Lock-up (pre-plaster)Windows, cladding and external doors in, before plaster
  5. Fixing inspection in Berwick5FixingJoinery, doors and trims in, painter booked next
  6. Pre-handover (PCI) inspection in Berwick7Pre-handover (PCI)Around a week before practical completion

All construction stage inspections in Berwick →

Guides

Construction stage guides for Berwick

All guides →

Book a waterproofing inspection in Berwick

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FAQ

Waterproofing inspections in Berwick: common questions

Why not leave this to handover?

At handover the membrane is under tiles. The only way to check it then is to lift them.

What is a bond breaker?

A strip or bandage at joints and penetrations that lets the membrane flex without tearing.

Which standard applies?

AS 3740 for wet areas, with the Guide to Standards and Tolerances 2015 for finished work.

Do you flood test?

No. The inspection is visual, by hand and by moisture meter where useful.

Are balconies included?

Yes, where the membrane is exposed, including puddle flanges at outlets.

How soon is the report?

Usually the same day, so the tiler can be held back if needed.

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