Leak diagnostic
Work out what is actually leaking
Eight questions about what is visible, and no email address at any point. The result is a plain-English read on what is probably happening, whether resin injection would fix it, an indicative market cost band, and the questions worth putting to anyone who quotes the work. It runs entirely in the browser and collects nothing.
Question 1 of 7
Where is the water appearing?
No email address required at any point. The full answer is given either way — nothing here is gated behind an enquiry.
What the diagnostic asks, and why
Nothing is hidden behind the tool. These are the questions an experienced waterproofer works through before deciding whether a job is an injection job at all, written out in full so they can be read, printed or used without running the tool.
01Where is the water appearing?
- Garage or under-house wall
- Retaining wall
- Basement or car park wall
- Car park ceiling or soffit
- Lift pit
- Under a planter box or garden bed
- Up through the floor
- Water tank or pool
- Along the join where the wall meets the floor — This is the kicker joint — the single most common path
02What does it look like right now?
- A damp patch, no visible water
- White powdery bloom only — Efflorescence — salt left behind by water that has moved through
- Beads forming, a slow weep
- A steady trickle
- Running or gushing
03Is there a line you can point at?
Stand back and look at the whole wall. The water often exits somewhere other than where it got in.
- One visible crack
- A straight joint line — Dead straight and level usually means a construction joint, not a crack
- Several cracks
- No defined line — the whole area is damp
04When does it happen?
- Only during or after rain
- All the time, rain or not
- Bad in the wet season, dries out in winter
- Started after one specific storm or flood
05How wide is the crack?
Hold a business card against it — the edge is about 0.3 mm. A credit card edge is about 0.8 mm.
- Hairline — thinner than a business card edge
- Fine — about a business card edge
- I can get a fingernail in it
- Wider than 2 mm
- There isn't one, or I can't tell
06Which side can you stand on?
- The dry side only — Inside the garage, basement or car park
- Both sides
- Only the wet or outside face
- It's below ground on both sides
07What sort of building is it?
- House or townhouse
- Strata or apartment common property
- Commercial or industrial
08Is the slab suspended or post-tensioned?
Post-tensioned slabs have steel tendons under enormous tension running through them. Drilling one without a scan can cut a tendon, and that is not recoverable.
- Yes
- No
- I don't know