Order White Non Woven Drainage Membrane (200gsm) – Custom Sizes Online
Lotrak® 200 is a mechanically bonded needle punched non woven geotextile which withstands the use of larger varieties of granular materials whilst retaining an effective filtration capability.
Lotrak® 200 is also an ideal filtration geotextile when used in conjunction with an installed crate infiltration Sustainable Urban Drainage System (SUDS).
Lotrak® 200 is approved by Network Rail (Certificate of Acceptance PA05/06066) for drainage applications such as pipe or trench wrap and conforms to NR/SP/TRK/010 ‘Geotextiles’. (PADS Number: 057/101450)
The main purpose of this geotextile is to offer higher mechanical strength in separation and filtration applications.
Laying the Geotextile
In preparation for installing the geotextile, clear the area of any large objects such as shrubs, logs, or large angular stones, as these would immediately damage the geotextile when rolled out. Similarly, any holes or significant unevenness existing in the ground should be filled in with a suitable compactable material (for example, sand) and levelled prior to laying the geotextile.
If a significant size hole is present, it may be appropriate to line the hole with geotextile membrane prior to placing in compactable material for added separation. It is also considered good practice to proof roll the area prior to applying the geotextile, using a small vibrating compactor if possible.Unsuitable subgrade areas may be excavated and back filled with suitable material before
full installation can proceed.At this point it is worth considering the use of a heavy-duty weed killer to prevent further growth and penetration of weeds into the finished construction. Specialist assistance would be required if Japanese knotweed is present in the construction area.Depending on the intended construction project, a form of drainage system may be required prior to laying the geotextile, especially if the ground has poor drainage characteristics.Once the area has been rolled or levelled, roll out the geotextile over the ground, keeping it taught enough to minimise wrinkles but allowing it to adopt the shape of any contours.If the geotextile is placed with a lot of wrinkles or folds it will not be tensioned and will not provide reinforcement. The geotextile can be held in position with small deposits of granular material or bags of sand until such time as total cover placement takes place,which should not exceed 30 days.The geotextile is normally laid with the length in the direction of travel e.g. of a road.For guidance on overlapping of geotextile please see section below.On no account should any machine traffic drive directly on top of the geotextile. The granular fill material should be end tipped on to fill already placed at one end of the project.This should then be blade levelled across the total area to the required thickness by atracked machine continually working on top of the tipped material. It is recommended that a minimum 300mm depth of fill be placed prior to any compaction or trafficking. Avoid inadvertent movement of the geotextile during the placement of aggregate. Lotrak geotextiles can be easily cut on site, if required, using a sharp blade. If a full width roll needs to be cut to smaller widths then this can be achieved using a circular stone cutting saw.
Lotrak geotextiles should be covered within 1 month of being installed. The geotextile should not be exposed to direct sunlight for more than 30 days. Before covering the geotextile should be checked by an inspector for extensive damage (holes or tears) and be repaired by placing a new layer of geotextile over the damaged area, ensuring that there is a minimum overlap of 1000mm between the edge of the damage and the overlapping patch. Alternatively, the damaged area can be replaced by undamaged geotextile.