Auckland Wide · Free Consultation
Membrane roofing is the answer when a roof is too flat for metal sheet or tile to shed water reliably. A continuous, sealed sheet of torch-on bitumen, butyl rubber or TPO covers the whole surface, with no laps for wind-driven rain to push through. We lay membrane roofing in West Auckland on low-pitch roofs, decks over living spaces, parapets and internal gutters, from Te Atatū bungalows to modern Kumeū builds.
Getting membrane right is mostly about what happens underneath and at the edges. The substrate has to be sound, dry and laid to a proper fall, outlets need to be sized for a West Auckland downpour, and every upstand, penetration and termination has to be detailed so water has nowhere to go but the drain. Plenty of the leaking membrane roofs we see failed at a corner or outlet, not in the middle of the sheet.
If your membrane roof is ponding, blistering or leaking into the ceiling below, we can assess whether a targeted roof repair will do the job or whether it is time to strip and relay, and we'll show you photos of what we found so the decision is yours to make with the full picture. We also handle membrane-lined box gutters, which often sit at the heart of a flat-roof leak and are easy to overlook.
No obligation. Tell us about your roofing project.
From new installations to patch repairs, we work with the main membrane systems used on New Zealand homes and light commercial buildings.
Two-layer torch-on bitumen is a tough, proven choice for low-slope roofs and decks. We heat-weld a base sheet and a mineral-surfaced cap sheet, staggering the laps and dressing the upstands so the finished roof handles foot traffic, UV and heavy rain without fuss.
Butyl is flexible, forgiving of movement and well suited to roofs with lots of penetrations or odd shapes. We bond it to a prepared plywood substrate, seam it carefully and form the corners and outlets by hand, giving a clean, watertight finish on complex layouts.
TPO is a lightweight, heat-welded single-ply membrane with good UV resistance and a light surface that reflects heat. It suits larger low-pitch areas and some commercial roofs, and the hot-air welded seams form a strong, continuous bond once complete.
A deck over a bedroom or garage is one of the riskiest parts of any home for weathertightness. We focus on falls, threshold heights, outlet and overflow placement and how the membrane meets the wall cladding, so the deck can take tiles or timber without leaking below.
Splits, lifted laps, blisters and failed outlets can often be repaired without replacing the whole roof. We find the actual entry point, cut out damaged material, prime and patch with a compatible membrane, and tell you honestly how much life the rest of the roof has left.
When a membrane has reached the end of its life or the substrate underneath has gone soft, we strip back to the framing, replace rotten ply, correct the falls where needed and lay a new system. This is often the point to improve outlets and add overflows too.
Every membrane job starts with the substrate. We check the plywood for moisture, rot and movement, confirm the falls direct water to the outlets rather than leaving ponds, and replace anything that isn't up to it. A membrane is only as good as the surface it is bonded to, and short-cutting this step is behind many early failures.
Next come the details: outlets with proper sumps, overflows set at the right height, upstands carried well up behind the cladding, and penetrations sealed with purpose-made collars rather than a bead of sealant. We then lay the membrane in the right sequence so laps shed water, finish with any surface protection the system needs, and flood or water-test where appropriate before we leave. Where the work needs a building consent, we will tell you upfront.
We work with torch-on, butyl and TPO, so we recommend the system that suits your roof shape, traffic and budget rather than pushing the only product we happen to know.
Outlets, upstands, corners and penetrations are where membranes leak. We spend the time on those details, because a perfectly laid field sheet means nothing if the edges let water in.
West Auckland can drop a lot of water in a short time. We size outlets and overflows so a flat roof clears quickly instead of ponding against upstands during a winter storm.
Our membrane work is carried out with the NZ Building Code and E2 weathertightness requirements in mind. If your deck or roof project needs a building consent, we flag it early so it doesn't hold the job up later.
If a patch will genuinely solve the problem, we will tell you. If the membrane or substrate is failing more widely, we explain why and show you what we found.
We are licensed and insured, and our membrane workmanship is backed by a guarantee. If something isn't right after we finish, we come back and put it right, without arguments about whose fault it was.
We provide membrane roofing across West Auckland, including Henderson, New Lynn, Te Atatū, Titirangi, Massey, Ranui, Glen Eden, and Kumeū.
If your suburb isn't listed, get in touch anyway — the list is a starting point, not a boundary. We work right across West Auckland and the wider Auckland region, so tell us where you are and what you need, and we'll confirm when we can get to you.
Answers to the questions West Auckland homeowners ask us most about membrane roofing.
Neither is better across the board. Torch-on is very durable and handles foot traffic well, which suits decks and accessible roofs. Butyl is more flexible and easier to form around complex shapes and penetrations. We look at the roof's layout, use and exposure before recommending one.
A well-installed membrane on a sound substrate with good falls can give many years of service. Lifespan drops quickly if water ponds, outlets block or the roof gets heavy foot traffic without protection. Regular clearing of outlets and occasional inspections make a real difference.
Ponding usually means the falls are too shallow, the substrate has sagged, or the outlets are blocked or set too high. Standing water speeds up membrane ageing and loads the structure, so it is worth correcting rather than ignoring.
Sometimes, but rarely as a first choice. Overlaying can trap moisture and hide rotten ply underneath. We usually recommend stripping back so we can inspect and repair the substrate, unless the existing membrane is sound and the manufacturer's system allows an overlay.
Like-for-like repairs often don't need one, but replacing a membrane deck over a living space, changing falls or altering the structure may. We will advise on your specific job and can work alongside your designer or the council where consent is required.
Got a deck that leaks into the room below, a flat roof that holds water for days, or an old torch-on roof that's cracking and blistering? Talk to us about membrane roofing in West Auckland. We will inspect the substrate, outlets and edge details, explain whether repair or relay makes more sense, and give you a free, clear quote. Call 09 888 0409 or send through the form.
