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VLF-150

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000. Part No.

320201

010. Product Name

VLF-150

020. Short Description

Nonwoven, needlepunched geotextile for separation and filtration functions.

040. Typical Photo

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070. Product Description

Diadem VLF-150 is a needle-punched, non-woven fabric that functions as a filter between the growing media and drainage layers of the vegetative roof system. It is designed to filter sediments and fine particles out of water flowing into the drainage layer. The fibers are needle punched to form a network that retains dimensional stability. The fabric is resistant to bitumen and to the biological and chemical environments normally found in soils. VLF-150 has limited resistance to UV degradation.

080. Application

VLF-150 fabrics have many uses on vegetated roofs, but their main functions are filtering run off, mechanical protection, and separation of incompatible materials. VLF-150 geotextiles provide excellent filtration performance without becoming clogged.

090. Frequently Asked Questions

  • What are the proper end laps for VLF-150?
The manufacturer recommendation is that VLF-150 end laps should be at least 4” on all aspects. VLF-150 should be installed starting on the down slope side of the roof, moving upward.
  • How high should VLF-150 be drawn up on vertical surfaces?
When used as a protection layer the material should fully cover the waterproofing layer. On vertical surfaces where the geotextile is left exposed, we recommend securing by mechanical means and covering the material with flashing.
  • How long can the products be stored outside or exposed to sunlight?
VLF geotextiles are UV stabilized, however it is not recommended to store or leave them exposed to sunlight for more than 4 weeks. If the covering of the rolls deteriorates over time, consider rewrapping or an alternate storage method that will prevent exposure
  • Does a VLF-150 layer need to be physically adhered to the layer below it?
No, fabrics are not mechanically attached. But if left exposed should be weighted against potential wind uplift.
  • Are VL geotextiles root-resistant?
No, roots are meant to grow through the layers of the system. By intertwining in this way, the roots strengthen the entire system and over time mature root growth helps maintain the stability of the system.

100. Benefits

  • Resistant to both acidic and basic substances and environments.
  • Withstands heavy point loading.
  • Excellent permeability.
  • Easy to cut.

120. Studio / Macro Photos

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