09 · building trades # Waterproofing and membrane specialists in Auckland ## Summary **Waterproofing and membrane specialists** (Building trades). Wet-area membranes, decks, roofs and basements. Roof membranes on a house are restricted building work (Roofing class areas of practice). Wet-area membranes are not licensed, so ask for the system's approved-applicator certificate and warranty. No listings yet: free listings are open. ## What waterproofing and membrane specialists do Waterproofing specialists apply membranes to showers, balconies, decks, flat roofs and below-ground walls so water cannot get into the structure. **You usually need them for:** A tiled shower or bathroom, a deck over living space, a flat or membrane roof, or a basement or retaining wall that leaks. ## Where they fit in a new build or renovation Typical project stages where this trade is on site: 1. **Roof and cladding (weathertight)** 2. **Fit-out and finishes** 3. **Completion and maintenance** Usually needed for: [bathrooms](/projects/bathrooms/), [recladding & weathertightness](/projects/recladding-weathertightness/). Stages are indicative. Your builder or project manager sets the real sequence. ## Check before you hire Roof membranes on a house are restricted building work (Roofing class areas of practice). Wet-area membranes are not licensed, so ask for the system's approved-applicator certificate and warranty. ### Official links * [Licensed Building Practitioners (LBP) scheme](https://www.lbp.govt.nz/) * [LBP public register](https://kete-lbp.mbie.govt.nz/advanced-building-practitioner-search/) ### Questions to ask * Which membrane system and warranty will you provide? * Are you an approved applicator for that product? * What tests (such as flood testing) do you do before tiling or covering? Checked against the official sites on 3 Nov 2026. General information only, not legal advice. ## Waterproofing and membrane specialists in Auckland ### We're adding waterproofing and membrane specialists soon — are you one? Get a free listing: it takes a couple of minutes, and homeowners comparing waterproofing and membrane specialists in Auckland will find you here. [Get a free listing](/for-trades/?trade=waterproofing#claim) No waterproofing and membrane specialists listings yet, so this page is hidden from search engines until the first listing goes live. ## Frequently asked questions What do waterproofing and membrane specialists do? Waterproofing specialists apply membranes to showers, balconies, decks, flat roofs and below-ground walls so water cannot get into the structure. When do I need a waterproofing specialist? A tiled shower or bathroom, a deck over living space, a flat or membrane roof, or a basement or retaining wall that leaks. How do I check a waterproofing specialist? Roof membranes on a house are restricted building work (Roofing class areas of practice). Wet-area membranes are not licensed, so ask for the system's approved-applicator certificate and warranty. What should I ask a waterproofing specialist before hiring? 1. Which membrane system and warranty will you provide? 2. Are you an approved applicator for that product? 3. What tests (such as flood testing) do you do before tiling or covering? How long should a shower membrane last? A properly installed system should last the life of the lining, and many systems carry a 10-year or longer manufacturer warranty when installed by an approved applicator. Ask for the warranty terms and flood-test records. ## Related trades * [Builders and carpenters](/trades/builders/) * [Plumbers and gasfitters](/trades/plumbers-gasfitters/) * [Electricians](/trades/electricians/) * [Roofers and spouting/gutter installers](/trades/roofers-spouting/) * [Plasterers and GIB stoppers](/trades/plasterers-gib-stoppers/) * [Painters and decorators](/trades/painters-decorators/) * [Tilers](/trades/tilers/) * [Joiners and cabinetmakers](/trades/joiners-cabinetmakers/) [All trades](/trades/) · [Trades by project type](/projects/)