VENTSOL PREMIUM 170 Membrane

PREMIUM 4-layer waterproof roof membrane. High vapor permeability, good wind protection. Assembly using counter-battens or full sheathing.

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Production profile 2026

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Technical specification

Technical Information

The membrane is completely waterproof, protects exterior thermal insulation from precipitation, and also serves as an excellent wind barrier designed to protect building walls in frameas well as in log homes, residential buildings, and industrial facilities. The product can be used on all ventilated and non-ventilated roofs with full or partial sheathing under roof coverings such as: metal roof tiles, trapezoidal sheets, standing seam sheet metal, ceramic roof tiles, and concrete roof tiles.

weight

170^g/m²

operating temperature range

-30° to 80°

water vapor permeability (Sd)

0.02 m

water resistance

Class W1

reaction to fire

Class E

tensile strength in the longitudinal direction

N/50mm
270

transverse tensile strength

N/50mm
140

application

on roofs with full and partial decking

Recommendations

The membrane should be protected from direct UV exposure for one month after assembly and from the effects of scattered radiation for up to three months by installing thermal insulation on the interior.

The product is not resistant to petroleum-based substances (e.g., oil, gasoline, etc.).

Physical Properties

The VENSTOL PREMIUM 170 membrane can be used on all ventilated and non-ventilated roofs, under roof coverings such as: metal roof tiles, trapezoidal sheets, standing seam sheet metal, ceramic roof tiles, and concrete roof tiles. The membrane’s mechanical strength allows it to be used on roofs with either full or partial sheathing.

Physical Properties of the Product

Roll Dimensions

Length

50 meters

Width

1.5 m

Membrane Color

white, navy blue

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Product Description

Roof membranes

The Blachy Pruszyński Company offers specialized roof membranes for its roof profiles, which serve as an integral and essential component of the roofing system. The roof membranes are laid beneath the metal roof tiles and are typically fastened to the sheathing or boarding. They play a very important role in the roof structure—on the one hand, they provide adequate protection for the roof’s insulation layer against moisture, and on the other, they ensure proper roof ventilation. Our product line includes two types of membranes:

Based on many years of experience and research, we can conclude that the key to trouble-free operation of a roofing system is the use of an appropriate vapor barrier in combination with a high-vapor-permeability pre-covering (FWK). The use of low-vapor-permeable membranes is now being phased out. Our company recommends using the highest-quality materials, which ensure long-term, trouble-free roof performance. The role of a roof is limited to two basic functions: it must be watertight and aesthetically pleasing. Watertightness may not be achieved if a poor-quality membrane (or underlayment) is used or if its assembly is incorrect. Another important consideration is that a roof built using a high-quality membrane is simply more cost-effective and provides better insulation, which is clearly reflected in your heating bills.

The Blachy Pruszyński Company offers high-quality vapor-permeable membranes. Roof membranes are typically protected against UV radiation; to this end, special stabilizing components are added to increase their resistance to solar radiation. It is important to note that roof membranes must not be exposed to prolonged direct sunlight; therefore, it is recommended to enclose the roof as soon as possible. The membrane’s resistance to direct sunlight is rated at 3 months. Thanks to its high vapor permeability, there is no need to create a ventilation gap between the membrane and the thermal insulation. Please note that the assembly of the membrane should always be performed in conjunction with counter-battens.

Do you have any questions?

Does the roof need maintenance?

Yes, every roof requires periodic inspections to check for any damage. Most products offered by the Blachy Pruszyński Company are available with various types of specialized coatings (covered by Warranty) that increase the service life and durability of metal roofing. Maintenance mainly involves removing soot and chimney dust, which, if left for an extended period, can damage the metal sheeting. Particular attention should be paid to the areas around chimneys, which are critical due to more demanding operating conditions. If localized damage to the paint coating is noticed during an inspection of the roofing, touch-up painting should be performed. In such situations, the best solution is to use dedicated touch-up paints matched to the specific coating. The Blachy Pruszyński Company offers such paints as part of its regular product line, and it is strongly recommended to use the company’s products that are recommended for the specific coating.

Is it possible to install copper flashings on a steel roof?

Caution must be exercised when using copper, as copper oxides are highly corrosive and cause corrosion of other metals. For this reason, it must not be combined with other types of metals on buildings (copper reacts upon contact and causes electrolytic corrosion of other metals).

Can I use an angle grinder to cut sheets?

Modern roof coverings preclude the use of angle grinders for cutting. Using this method to cut the material will void the Warranty.
An angle grinder generates a great deal of heat during operation and cutting, which in turn damages the edges of the sheet metal as well as its protective coating. Additionally, the metal shavings produced during operation become embedded in the sheet metal’s surface, creating potential corrosion sites.
The proper way to cut sheet metal is to use automatic nibblers or hand shears. These tools use mechanical force to cut the sheet metal without exposing it to extreme temperature fluctuations. Additionally, it’s worth remembering that after cutting, it’s a good idea to protect the cut edges with a dedicated protective varnish or special paint.

Why are metal roof tiles recommended for renovating old roofs?

This is directly related to its light weight. In the case of old roofs, the roof trusses of renovated houses are often already somewhat worn down by time. Therefore, it is safer to use metal roof tiles, which weigh around 4.7 kg/m², rather than ceramic roof tiles, which are nearly ten times heavier. However, it’s always a good idea to have a specialist inspect the condition of the roof truss and confirm whether it requires renovation or replacement after all. In such cases, the safety of the building’s residents or employees, as well as the installation crew, is always the top priority. In most situations, however, the condition of the structure allows for the use of metal roof tiles without major issues, whereas the use of ceramic roof tiles would no longer be possible.

How can I advertise a product? Where can I find more information?

Complaints should be filed at the wholesale store where the purchase was made. If the wholesale store in question has closed (is no longer in business), the completed complaint form should be sent directly to Pruszyński Company at the following address: pruszynski@pruszynski.com.pl

A complaint form is available in the "Downloads / Forms" section or directly here: COMPLAINT FORM

How to register and how does the warranty work?

In order to register the warranty, download the warranty registration available in files for download / printing or directly:
Warranty registration and send it completed to the following address: guarantee@pruszynski.eu

The warranty begins to apply on the day of purchase of the goods. Registration of warranty is necessary to quickly identify the purchased batch of goods.