IZOBIT ULTRA TOP- NEW

Let’s start with the reinforcement. ULTRA TOP uses a 300 g/m² polyester mat – why is this parameter so important, and what does it mean for long-term durability and strength?

The reinforcement is the “skeleton” of every membrane. Using a polyester non-woven of 300 g/m² significantly increases tensile strength — in ULTRA TOP we achieve about 1200 N longitudinally and 1000 N transversely.
These values are well above the market average for top-layer membranes. Such high strength means the material performs better under tension and roof movement over time.
In addition, ULTRA TOP shows high elongation at break (approx. 60–70%), which allows it to absorb mechanical and thermal stresses without losing integrity.

Another distinctive feature is the thickness – a minimum of 5.6 mm. What advantages does this bring?

A thickness of 5.6 mm exceeds that of most membranes currently available on the market.
This design provides greater resistance to mechanical damage, point loads, and dimensional stability.
The thicker bitumen layer acts as a protective buffer — both during installation and throughout the long service life of the roof.
ULTRA TOP also helps to smooth minor substrate irregularities, improving the overall finish quality.

ULTRA TOP declares a temperature resistance range from –30 °C to +120 °C. How does this compare to competitive solutions?

This is among the widest temperature ranges offered by SBS-modified top membranes.
Flexibility at –30 °C means the material remains elastic even in severe winter conditions — while many competitive membranes are rated only down to –25 °C.
At the high end, ULTRA TOP withstands temperatures up to +120 °C without deformation or bitumen flow, whereas most competing products reach their limit around +100 °C.
In practice, this means greater stability year-round and a higher safety marginunder extreme conditions.

Nail-tear resistance — what is its role, and how does ULTRA TOP perform here?

This is a very important parameter in everyday construction work.
On site, there is always a risk of accidental puncture from sharp objects — tools, screws, or parts of the structure.
In tests, ULTRA TOP achieves a nail-tear resistance of about 450 N, significantly higher than the typical 300–350 N range for many standard products.
For contractors, this means less risk of accidental damage, better waterproof integrity, and lower maintenance needs over the roof’s lifetime.

Which key advantages over the competition would you consider the most significant?

First — thermal resistance. The range of –30 °C to +120 °C provides a clear advantage under the climatic conditions of Central and Eastern Europe.
Second — tensile strength. Thanks to the 300 g/m² reinforcement, ULTRA TOP reaches 1200/1000 N, whereas comparable membranes often remain within 800–1000 N.
And third — puncture resistance. ULTRA TOP offers greater protection against point damage than most competing solutions.
Together, these properties deliver superior quality and measurable cost savingsthroughout the roof’s service life.

What are your views on the market prospects for this type of high-performance material?

I am convinced that the professional construction market will continue shifting toward high-quality materials that improve workmanship standards and reduce the risk of failures.
We see a clear trend of growing technical awareness and quality expectationsamong contractors.
Material technology is advancing — and at IZOBUD, we want to be part of that progress by offering products that not only meet standards but actively redefine the quality benchmark in roofing.