Waterproofing Debt Recovery: An Adviser's Guide

How waterproofers get paid

Waterproofing protects wet areas, balconies, basements, roofs and below-ground structures. It is subcontracted to builders and tilers and paid against progress claims, usually as a small line relative to the whole job. The work is then immediately covered by tiling, screeds, decking or backfill, so it disappears from view almost as soon as it is inspected and signed off.

That hidden, warranty-critical nature is the trade's defining feature. The membrane is judged not by how it looks at handover but by whether the area stays dry months or years later — which means the waterproofer's payment, and reputation, are exposed to a verdict delivered long after the job, often by water rather than by inspection.

Why payments stall

Leak blame is the signature dispute. When a wet area or balcony leaks, the waterproofer is the obvious target even where the failure traces to tiling, plumbing, drainage, building movement or damage by a later trade. A builder facing a defect claim from the owner above is tempted to withhold the waterproofer's payment as a hedge, sometimes long after completion. Because the membrane is covered, proving who caused a leak is genuinely contested.

On subcontract work, the usual builder cashflow pressure applies, and as a small early line item the waterproofing claim is easy to leave unpaid while bigger arguments play out.

Red flags on a waterproofing account

Watch for a payment withheld pending a leak investigation, a builder holding the waterproofing claim as a hedge against an owner's defect complaint, and blame assigned without evidence that the membrane actually failed. A claim left unpaid long after sign-off, attached to a leak that may have a different cause, is a structural warning.

On subcontract work the Security of Payment regime applies, so a disputed or withheld claim is best reviewed promptly within the statutory windows rather than left to wait on an open-ended investigation.

How Merion recovers it

Merion recovers commercial waterproofing debts on a commission-only basis, so a waterproofer can act on a withheld claim without an upfront fee. The review covers the subcontract, the progress claims, the inspection and sign-off records, any compliance certificates and the sequence of following trades, then a professional demand is made. A genuine membrane failure is separated from a leak caused downstream by others, and a claim held merely as a hedge is met with the sign-off evidence.

If a waterproofing client has a claim withheld over a leak, pass it on through refer a debt or request a free debt appraisal.