• 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.