Commercial Membrane Roofing Auckland

Topline Roofing has been installing commercial membrane roofing and flat roof solutions across Auckland for around 40 years, working on commercial offices, industrial buildings, schools, retail developments, and multi-unit residential projects. We hold Totika Impac 5 Star Prequalification and SiteWise Gold 100% for 9 consecutive years. Membrane roofing is also the essential foundation for green roof and living roof installations - see our green roof and living roof page for more.

Expert Installers of Commercial & Industrial Flat Roofing Solutions

Auckland's commercial flat roof / membrane roofing experts, Topline Roofing, install flat roofs and membrane roofing solutions. We are one of Auckland's most experienced installers of Viking Roofspec TPO Membrane Roofing. TPO is similar to rubber roofing, known as Butynol or Torch On, but is safely fusion welded with fewer joins, which is why Topline Roofing chooses TPO over other forms of membrane.

We are proud to have supplied and installed high quality membrane roofing solutions on many commercial and industrial builds, factories, shopping complexes, and schools across the greater Auckland region. We believe in delivering quality solutions that last.

To achieve this, we only use quality products, follow best practice with excellence in health & safety, and have a great team of highly skilled membrane roofers who are committed to ongoing training. To top it off, we stand behind our work with the Topline Guarantee.

We also repair and install membrane roofs for residential customers >

"These guys are very professional and have been great to deal with. I would highly recommend"

Ronan N

Membrane Roofing Installers, Auckland

Viking Roofspec Approved Applicators, Auckland

Auckland's approved applicators for Viking Roofspec which offer extensive roofing products, rubber roofing and waterproofing systems for use on commercial buildings.

Low-Pitched Commercial Roof Solutions

Certain properties require a low-pitched roof or flat roof due to boundary restrictions and need to be fitted with the correct roofing materials to ensure they remain weathertight. These properties lend themselves to the installation of TPO, or Thermoplastic Polyolefin, membrane roofing which is widely used in New Zealand.

What is Membrane Roofing?

Membrane roofing offers excellent weathertightness, so is ideal for use on commercial roofing, gutters, and parapets to protect valuable business assets from potential leaks. Membrane roofing is ideal for the harsh Auckland weather and can tolerate high winds, heavy rain, and strong UV rays.

Looking for a commercial roofer to work with TPO Membrane?

Having TPO specialist roofers on our teams who are trained in the installation of Viking Roofspec products ensures we know a lot about the product, and we love it. Here's why we love working on TPO Membrane roofs to deliver great results for clients.

Why TPO Membrane?

TPO Membrane is durable, tear-resistant, and most importantly, weathertight. This makes it the perfect solution on flat roofs and low-pitched roofs. Joints are fusion welded with hot air dispensed from a heat gun which retains the join integrity and, more importantly, is also the safest way to weld joins together. We believe in working with quality products to ensure that the investment in your roof will stand the test of time.

Membrane Roof Repairs, Auckland

Topline Roofing can carry out short term solutions and repair work if your commercial flat roof needs fixing. In some cases, a quick repair might be necessary to address an immediate concern whilst considering a full reroof.

Butynol Roofs - Repairing a Flat Roof

Viking Roofspec Silcoat is a liquid membrane system that can be applied to virtually any existing roof surface to extend its life. One of Topline Roofing's TPO specialists will be able to determine whether this option is suitable.

Warm Roof Systems for Flat Roofs

Warm roof systems can be laid over an existing membrane (or metal) roof, adding continuous insulation above the structural deck to combat noise, condensation, humidity, and damp. This makes them an ideal upgrade for commercial flat roofs where thermal performance and indoor comfort are priorities. For a full technical explanation of how warm roof systems work, see our warm roof systems guide. For the sustainability and energy efficiency case, see our warm roofs for sustainable buildings page. To discuss installation, see our commercial warm roof systems page.

What are the Benefits of a Membrane Roof?

There are numerous benefits when installing a membrane roof, including:

• High Thermal Insulation Properties
• Warm in Winter, Cool in Summer
• UV Resistance
• Heat Reflective
• Sustainable and Recyclable
• Non-Disruptive Application for Tenants
• Durable
• Reduces Exterior Noise
• Weathertight

The Topline Team Will Ensure It's Business as Usual

At Topline Roofing, we understand that efficiency is everything, especially in today's market. Any downtime in day to day business running can mean lowered productivity and income. The expert team at Topline Roofing will ensure minimal disruption to workers, tenants, and business as usual through open communication and planned project management. Topline Roofing's team of dedicated Technical Consultants, Estimators, and Project Managers are on hand to offer professional advice on the best roofing solutions as we understand that no two properties are the same and requirements differ from building to building.

What to Expect With a New Roof

A representative from Topline Roofing will take measurements and evaluate which materials are most suitable for the roof. This is the time to address any specific technical queries. The job will be priced up and a written quote provided. On acceptance of quote, Topline Roofing will organise a pre-let meeting where all aspects of the job and project management will be outlined, including the processes to manage materials, tenants, and site access. Topline Roofing is also able to project manage any external suppliers such as scaffolders, painters, and electricians if required.

Our sister company Topline Trade Services is also able to provide plumbing, gasfitting, and drainage services, including the installation and maintenance of commercial backflow devices.

Check out Topline Roofing's Commercial Project Management Process for a detailed description of how we can help.

Topline Roofing are the Membrane Roofing Experts

Looking for a specialist membrane roofer in Auckland? The Topline Roofing team are specialist trade experts and we stand by our work. Our professional membrane roofers are highly skilled and we make sure to provide our customers with warranties for all commercial roof replacements. Topline Roofing works with trusted suppliers such as Viking Roofspec and also offers a Programmed Asset Maintenance service to ensure that the conditions of those supplier warranties are satisfied. A new roof is an investment and should be treated as a business asset. Proper maintenance of your membrane roof will ensure the longevity of a newly installed flat roof.

Related Services

Membrane roofing works alongside other high-performance commercial roofing solutions. For buildings where energy efficiency and condensation control are priorities, a warm roof system with membrane finish places continuous insulation above the structural deck for significantly better thermal performance. For green roof installations, a correctly specified warm roof membrane is the essential waterproof foundation - see our green roof and living roof page. For solar-ready flat roof preparation, see our solar-ready roofing page.

Commercial Membrane Roofing Projects

See our membrane roofing work in our roofing projects gallery, including the MOTAT membrane warm roof overlay - a 2,010m² overlay over an existing leaking metal roof without demolition - a flat roof membrane installation completed by the Topline Roofing team.

Further examples of flat roof solutions installed by the Topline Roofing team:
MOTAT Building 5 | Mt Eden Corrections Facility | Unitec Walkway

Health and Safety is Our Top Priority

Topline Roofing is proud to have achieved a Totika Impac 5 Star Assessment Rating, as well as SiteWise Gold Status with a score of 100% for 9 years running. Fewer than 3% of businesses have attained Gold Status, which shows our ongoing commitment to providing a safe environment for both our team and our customers. Health and safety is at the heart of everything we do and Topline Roofing will continue to maintain these exceptional standards by making health and safety our top priority.

Topline Roofing are a member of RANZ (Roofing Association New Zealand). Get in touch with our knowledgeable team of roofing experts now to see how we can help with your commercial roofing requirements. Request a quote, enquire online or phone 0800 555 818

Commercial Membrane Roofing FAQs

What is commercial membrane roofing?

Commercial membrane roofing is a continuous waterproof layer applied to flat and low-pitched commercial roofs. Unlike metal roofing which uses individual overlapping sheets, membrane roofing provides a seamless weatherproof surface ideal for flat roofs, parapets, gutters, and penetration-heavy rooflines. TPO (Thermoplastic Polyolefin) membrane is the most widely used system in New Zealand commercial construction, heat-welded at all joins for superior weathertightness. Topline Roofing are experienced, authorised installers of Viking Roofspec TPO membrane systems across Auckland.

What is the difference between rubber roofing, Butynol, and TPO membrane?

All three are waterproof membrane systems suited to flat and low-pitched roofs. Rubber roofing and Butynol are the same product - Butynol is the NZ trade name for EPDM (Ethylene Propylene Diene Monomer), a synthetic rubber membrane that uses adhesives or mechanical fixing. TPO is a newer thermoplastic membrane that is heat-welded at all joins using a hot air gun, creating a fully bonded seamless joint that is stronger and more reliable than adhesive joins. TPO is UV resistant, heat reflective, and the preferred system for new commercial installations. Topline Roofing installs TPO membrane and can advise on repair options for existing Butynol roofs.

Can some low-pitched roofs use metal roofing instead of membrane?

Yes, and this is worth discussing before specifying any flat or low-pitched roof. Advances in long-run metal roofing profiles mean some metal systems are now suitable for very low-pitched roofs that would previously have required membrane. If your roof is low-pitched rather than completely flat, both options may be viable. Topline Roofing will assess your specific roof pitch, exposure, and requirements and advise on the most appropriate system. See our commercial metal roofing page for more.

How long does a membrane roof last?

A correctly specified and installed TPO membrane roof typically performs well for 20 years or more, depending on membrane thickness, site exposure, maintenance, and environmental conditions. Topline Roofing advises on the most appropriate specification for your building at the quoting stage and provides full details of the applicable manufacturer warranty on completion. Regular inspection and maintenance extends service life significantly.

Can a membrane roof be repaired rather than replaced?

Yes, in many cases. Where damage is localised, membrane roof repairs can address the immediate issue without a full replacement. Viking Roofspec Silcoat is a liquid membrane system that can be applied over an existing roof surface to extend its life where the substrate is still in sound condition. Topline Roofing will assess your roof and advise on whether repair or full replacement is the more appropriate and cost-effective solution.

Can a warm roof system be installed over an existing membrane roof?

Yes, subject to structural suitability assessment. A warm roof overlay installs continuous insulation and a new weatherproof membrane directly over the existing roof without demolition, delivering significantly better thermal performance, condensation control, and acoustic comfort. This means no disruption to operations and no exposed interior during installation. A structural assessment is always required first to confirm the existing deck can carry the additional load.

Can a green roof be installed on a membrane roof?

Yes, with the right membrane specification and subject to independent structural engineering assessment. Green roofs add significant load to the roof structure - extensive systems typically add 75-150kg per square metre when saturated - and a qualified structural engineer must confirm the existing structure can support this before any green roof is specified. It is the building owner's responsibility to commission this assessment. The membrane must also be specifically formulated to resist root penetration over time - standard TPO membranes are not sufficient. Topline Roofing's membrane expertise is one of the core competencies required for correct green roof installation.

Why does membrane roof installation have to be done right?

Because once a membrane roof is installed, the consequences of poor workmanship are significant and costly to fix. Incorrectly heat-welded joins will fail, allowing water to track under the membrane across large areas before a leak becomes visible inside the building. Poor detailing at parapets, penetrations, and drains creates persistent leak points. And unlike metal roofing where individual sheets can be replaced, a failed membrane often requires full replacement of the affected area. Topline Roofing's team are trained and authorised installers of the systems we specify, and all work is backed by the Topline Guarantee.

Who installs membrane roofs in Auckland and why choose Topline Roofing?

Topline Roofing installs membrane roofing for commercial, industrial, and residential buildings across Auckland. As authorised and trained installers of Viking Roofspec TPO membrane systems, with around 40 years of experience, our team invest in ongoing industry training to stay current with the latest installation standards and product developments. We hold Totika Impac 5 Star Prequalification and SiteWise Gold 100% for 9 consecutive years, and all work is backed by the Topline Guarantee and manufacturer product warranties. Completed projects include the MOTAT membrane warm roof overlay - a 2,010m² system installed over an existing leaking metal roof without demolition or disruption to operations. Request a quote or get in touch to discuss your project.

Is a membrane roof more or less expensive than a metal roof?

Generally membrane roofing carries a higher upfront cost than standard metal roofing for comparable roof areas, reflecting the specialist installation process and materials. However cost comparisons depend heavily on roof pitch, complexity, penetrations, and the specific systems being compared. For flat roofs where membrane is the appropriate specification, metal is not a like-for-like alternative. For low-pitched roofs where both may be suitable, Topline Roofing can provide quotations for both options so you can make an informed decision based on your specific building and budget.

How do I know if my membrane roof needs replacing?

Key signs include persistent leaks that keep returning after repairs, bubbling or blistering of the membrane surface, visible cracking or splitting at seams or around penetrations, pooling water that is not draining correctly, and a roof approaching or beyond its expected service life. Topline Roofing can arrange a professional roof inspection and written report to assess the condition of your membrane roof and recommend the most appropriate course of action. See our roof reports for more, or request a quote to discuss your requirements.

Can a membrane roof support solar panels?

Yes. Flat membrane roofs are among the best candidates for commercial solar installation, with tilt frames allowing flexible north-facing orientation regardless of building direction. The membrane specification, structural loading, and drainage around tilt frames all need to be accounted for in the design from the outset. Topline Roofing installs the roofing-side solar support components as part of the membrane roofing project. See our solar-ready roofing page for more.

What membrane roofing products does Topline Roofing install?

Topline Roofing works with quality NZ membrane roofing suppliers whose products are suited to New Zealand conditions. Our primary membrane systems include Viking Roofspec TPO single-ply membrane and Enviroclad systems, Nuralite membrane roofing systems, and Viking Roofspec Silcoat liquid membrane for overlay and repair applications. For green roof installations we specify root-resistant membrane systems formulated to withstand plant root penetration over the life of the system. Our team maintain authorised installer status and keep up with ongoing product training. See our suppliers and partners page for more.

Does membrane roofing work well with warm roof systems for sustainability?

Warm roof membrane systems are one of the most effective sustainable roofing choices for flat and low-pitched commercial buildings. The warm roof insulation reduces heating and cooling energy demand, the membrane provides long-term weatherproofing, and the combined system can support solar panel installation and green roof build-ups. For the full sustainability and energy efficiency case, see our warm roofs for sustainable buildings page.