Optimax PRO PV vs. Optimax PV

Which bituminous membrane should you choose for your roof?

Home construction is moving full steam ahead, with the roof framing complete and ready to go. No expense was spared on the structure — featuring full wooden decking designed for an ambitious, multi-pitch roof. But mid-September brings a real challenge. Overcast skies and looming autumn weather, paired with delayed supplier timelines that push the final roof covering back by several months. In moments like these, selecting the right roofing membrane is make-or-break for securing leakproof protection throughout the wait.

Beyond sheer weatherproofing, the right choice elevates your entire workflow — boosting jobsite efficiency, speeding up installation, and safeguarding the building's structural integrity even as temperatures drop. Choosing the ideal NEXLER membrane streamlines application so you can deliver a completely moisture-resistant, weather-ready roof with total confidence.

That is why NEXLER offers two premium solutions — the trusted NEXLER Optimax PV and the new NEXLER Optimax PRO PV. Both products are designed to make the roofer's job easier while delivering a roof built to last for decades.

The Optimax family – what do you gain regardless of choice?

No matter which variant you choose, you are working with a material that delivers tangible benefits both during construction and long after completion.

Superior resistance

High Styrene-Butadiene-Styrene modification combined with a robust polyester fleece carrier ensures the membrane easily withstands demanding jobsite conditions. Lower risk of punctures and tears means fewer repairs, less stress, and total peace of mind.

Long-term watertight integrity

These membranes retain their flexibility through harsh winters and scorching summers alike. For you, this guarantees peace of mind: the bitumised felt will not crack while unrolling or laying — even in ambient temperatures as low as -25°C — and the roof will reliably withstand severe thermal fluctuations.

Extra layer of protection

Should the main roofing layer suffer damage during severe storms, the membrane continues to safeguard the structure against water leaks and ultraviolet radiation. This gives property owners lasting confidence while highlighting the exceptional quality of your workmanship.

Easier installation

Seamless overlaps and lightweight rolls ensure faster, more comfortable installation on the roof. Transporting and handling these materials requires far less physical effort, saving both time and energy for the entire crew.

Universal application

A single premium solution suitable beneath various roofing surfaces, including sheet metal, shingles, and tiles. This provides greater flexibility when matching materials to specific project requirements.

NEXLER Optimax PRO PV – the ultimate solution for sheet metal roofing

Optimax PRO PV elevates roofing efficiency and installation comfort to a whole new level. It seamlessly combines the proven durability of bituminous products with exceptional installation speed. Its defining feature is an integrated fastening system that allows roofers to work with speed and precision, delivering an airtight, leakproof seal without relying on additional accessories. It is the perfect choice for projects where jobsite productivity and streamlined workflows are top priorities.

High temperature resistance

Metal roof coverings reach high temperatures and undergo significant thermal expansion and contraction. Optimax PRO PV maintains its dimensional stability under these harsh conditions, giving you full confidence that the underlayment will keep pace with the roofing material and will not degrade even after decades of service.

Greater scheduling flexibility

The roof can remain fully protected and wait for the final covering installation for up to 12 months. This offers immense convenience when delivery timelines or construction phases get delayed.

Safe substrate beneath sheet metal

The smooth top fleece layer prevents any scratching or damage to the underside of metal sheets. This proves especially crucial for standing seam metal roofs and modular metal tiles, where surface appearance and protective coating integrity are paramount.

Faster, hassle-free installation

An innovative self-adhesive mounting strip allows you to secure the membrane smoothly and seal the overlap in no time. No fighting with protective film, no extra adhesives, and no costly downtime allowing you to wrap up the job much faster. You simply finish the job in fraction of the time. Watch the video and see just how easy it is.

NEXLER Optimax PV — when you choose a proven solution

Optimax PV is a classic bituminous membrane that contractors have trusted for years for its outstanding durability and excellent handling on the roof.

Sure-footed stability on the roof slope

A fine-grain mineral surfacing enhances foot traction during installation. On steeper roof pitches, this provides greater stability and significantly improves working safety.

Quiet comfort

The higher material heavy-duty density acts as an effective sound barrier and absorbs impact noise — such as heavy rainfall — much better, even before the final roof covering is installed.

Uninterrupted workflow in cold weather

Thanks to bituminous adhesives or mastics, overlaps remain tightly sealed and secure even when ambient temperature drops. This guarantees complete roof protection and continuous jobsite progress, regardless of adverse weather.

Maximum flexibility for phased projects

Optimax PV can serve as the temporary final roof covering for up to 36 months. This provides a massive advantage when projects are executed in phases or when the final roofing layer is scheduled for a much later date.

Quick decision: which should you choose — Optimax PRO PV or Optimax PV?

Choose Optimax PRO PV if:	Choose Optimax PV if:
you want hassle-free installation and a tight, leakproof roof seal without relying on extra adhesives or mastics. you are installing metal roofing and require a smooth surface that guarantees zero scratching or damage to the metal sheets. you need ultimate peace of mind, backed by up to a 50-year warranty when used as an underlayment beneath the final roof covering.	excellent foot traction and stability while walking on a sloped roof are essential to you. you need maximum scheduling flexibility and plan for a longer interval up to 3 years before installing the final roof covering. you require absolute reliability in any environment, even during low ambient temperature.

Summary

Choosing bituminous membranes from the Optimax product line means working faster, easier, and with total confidence. You get a material that simplifies installation, enhances jobsite safety, and provides robust, long-lasting roof protection for years to come. For you as a contractor, this translates to fewer execution headaches and lower risk of call-backs. For the building owner, it delivers a durable roof and long-term peace of mind.

It is a solution that elevates not only the overall quality of the roof, but also your professional reputation.

Ready for a higher standard of work?

Check out the Optimax PRO PV technical specifications