Useful information

Root barrier

o-czym-warto-wiedziecAn effective root barrier is crucial, both in case of extensive and intensive roof vegetation, to prevent damage of roof’s sealing caused by penetrating roots.
For this purpose single or double layer materials are used. They usually constitute an effective barrier for roots. They take form of roof foils or membranes made of plastic. Double-layer coverings consist of min. 4mm of undercoat layer and of min. 5mm of top layer.
Both types of layers are manufactured with the use of SBS polymer modifi ed bitumen. In bitumen materials, resistance to overgrowing roots is obtained by addition of a special chemical substance or a copper foil insert. Roof coverings must be installed in accordance with manufacturer’s instructions, or with appropriate regulations.
100% of weather tightness is a necessary condition if a green roof is to be installed.


Fire prevention

  1. intensive vegetation regularly irrigated and carefully maintained with a thick layer of substrate is treated as a fi re-retardant covering,
  2. extensive vegetation should be treated as suffi ciently fi re-retardant (fi re spread and heat radiation) if it has the following characteristics:
    • defined mineral content of the bearing vegetation layer minimal thickness 3 cm,
    • low fi re load of vegetation forms,
    • bigger areas must be fi re-separated with either gravel or concrete slabs every 40 meters.


ochrona przeciwpożarowa


Wind-caused hazards

Due to operation of wind, buildings are subject to the activity of contact forces and wind suction forces. Their intensity depends on the direction of wind and on building’s construction and height. Wind load on the roof can cause damage during installation works and after the roof is ready. Surface of the roof has been divided into three areas depending on the level of hazards connected with wind load:

  • area exposed to hazard with a big load,
  • roof’s verge area with a big load,
  • roof’s middle area with a small load.

Each area of the roof should be properly protected with the use of adequate means. In areas exposed to hazard and in the roof’s verge area, gravel ballast and anti-buoyancy concrete slabs should be used.


Codependency between vegetation form and the thickness of the vegetation layer is portrayed in the following scheme:


See also

Green roofs

We have created an extensive GF green roof system, which due to its low technical requirements is suitable for almost all roof framing types. Our system has all the benefits both for people and the environment which are characteristic for green roofs.
Read more

Roll-out lawns

We also produce high quality turf-grass for roll-out lawns. Our carefully selected grass blends are grown on special plantations in Podlasie. This ecologically clean region of Poland offers perfect environment for growing turf-grass. From here, our lush, green turf-grass is transported to our clients in all regions of Poland.
Read more


We invite you to read the details of our offer. In the “Product Catalogue” department we present our mats, geo-textiles and other accessories used in green roof systems. Choose cooperation with the Green Flor company and enjoy soothing greenery in your surroundings!
Read more

Green Flor
Moskwin 1,
17-132 Wyszki k. Białegostoku

tel. 509 339 066

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Design and implementation: CS Group Polityka prywatności