What bituminous felt should you choose for photovoltaics? Discover NEXLER Protection

Photovoltaic systems are becoming increasingly popular on Polish roofs. For investors, they are not only an ecological source of energy, but also a real opportunity for savings and a step towards energy independence. However, in order for photovoltaic panels to work effectively for many years, it is essential to prepare the roof properly. In this article, we explain what bituminous felt to choose for a photovoltaic installation and why NEXLER Protection bituminous felt, distinguished by its exceptional fire resistance, has become the leader among professionals.

You can read this article in 5 minutes. You will learn from it:

• Why choosing the right bituminous felt for a photovoltaic system is crucial for the durability of the installation.
• What features make NEXLER Protection meet the requirements of modern PV systems.
• What technical and safety parameters distinguish this bituminous felt from the competition.

Photovoltaic systems: a challenge for roofs

The installation of photovoltaic panels brings many benefits:

• Production of green energy,
• Lower electricity bills,
• Increased property value,
• Independence from energy price increases.

However, the roof area intended for the installation of photovoltaic panels must meet increasingly demanding standards. It is the key foundation of the entire system, on which its efficiency and durability depend.

Why is the correct finishing of a roof for a photovoltaic system so important?

The installation of photovoltaic panels involves much more than just mounting the support structure. For the PV system to function properly and achieve the expected results, it is necessary to prepare the roof surface appropriately. Neglecting this step may result in damage to the panels or a reduction in their efficiency. Therefore, proper preparation of the roof for the photovoltaic installation is crucial.

A properly finished roof provides a solid and secure base for PV panels. One of the most effective solutions is to use suitable bituminous felt, which not only protects the roof surface from moisture and mechanical damage, but also fulfils a number of other important functions:

• Increased point loads – photovoltaic racks, ballast or anchors exert significant forces concentrated in specific areas.
• Increased risk of overheating – heat accumulates under the panels, which translates into a higher temperature of the roof covering.
• Limited access for servicing – once photovoltaic panels have been installed, servicing the membrane or bituminous felt becomes very difficult. Therefore, the protective measures used must be extremely durable and resistant in order to last for decades.

For these reasons, choosing the right bituminous felt for a photovoltaic system is extremely important. Investors and installers of this project must pay attention to its technical parameters, durability and fire properties to ensure long-term and safe operation of the PV system.

NEXLER Protection – bituminous felt for photovoltaic systems tailored to modern requirements

The NEXLER range includes a specialised weldable bituminous felt which has been developed, among other things, as a bituminous felt for photovoltaic panels. It is NEXLER Protection weldable bituminous felt, designed to meet the highest requirements in terms of waterproofing, durability and safety of flat roofs.

Key features and parameters of NEXLER Protection

One of the most important distinguishing features of NEXLER Protection bituminous felt is a special graphite additive which increases its volume by up to 300 times when exposed to fire, creating an insulating layer that inhibits the spread of flames. Compliance with the Broof(t1) standard confirms that this is a fire-resistant solution, which is particularly important in the context of photovoltaic systems – it reduces the risk of fire that may occur as a result of PV system failure, electrical short circuits or overheating of components.

Thanks to this property, investors and installers can be sure that a roof with NEXLER Protection bituminous felt provides an additional layer of protection for the entire building and its occupants.

• Double SBS (styrene-butadiene-styrene) modification – the combination of linear and radial SBS gives the bituminous felt exceptional low temperature flexibility (down to -25°C) and resistance to bitumen flow at high temperatures.
• Thickness of 5.2 mm – ensures exceptional mechanical strength even when fixing PV components.
• Special graphite additive – during combustion, it increases its volume up to 300 times, effectively inhibiting the spread of fire and providing additional fire protection (Broof(t1) standard).
• Watertightness under 10 kPa pressure – guarantees effective waterproofing, even during heavy rainfall.
• Resistance to weather conditions and UV radiation, which extends the service life to 25 years in a two-layer system with underlay bituminous felt.
• Simple installation thanks to an 8 cm edge strip, which allows for tight joining of plates and quick welding of the entire surface.

Exceptional strength parameters

These features make NEXLER Protection weldable bituminous felt ideal for both new investments and roof renovations prior to PV installation.

Choose reliability and safety for your photovoltaic roof

Effective and durable bituminous felt is an indispensable foundation for any PV installation. 

By choosing bituminous felt for roof renovations and new roofing from the NEXLER Protection line, you are investing in safety, tightness and damage resistance for decades to come. 

If you care about modern waterproofing, compatibility with PV manufacturers’ requirements and easy installation, choose the best bituminous felt for flat roofs – NEXLER Protection.

Contact our advisor and find out how to protect your roof for years to come.