Externally Applied Drainage Membrane from Bayset

NEWTON 408 ECODRAIN

• Prevents water pressure from bearing against the structure
• Resistant to all chemicals normally found in the ground
• Withstands stresses and movement acting as a slip membrane as the backfill settles
• Extremely strong material, minimising the risk of damage when backfilling.
• Very high compressive strength
• Suspended soil particles (fines) are filtered out by the geotextile layer
• Quick and easy to install

• As the drainage layer of an externally applied waterproofing system when used in conjunction with sheet applied or liquid applied external tanking membrane to BS8102:2009
• Protection of the structure from aggressive chemicals in the ground water
• To prevent the build up of ground water to retaining walls

• Build new structures to the requirements of BS8102:2009. Further guidance is available in CIRIA Report 139 - Water Resisting Basements.
• Use Bayset water-bars at construction joints as part of an effective multi-staged approach to the waterproofing.
• Carry out a geotechnical survey to evaluate soil characteristics and groundwater conditions in accordance with BS 8004. Great care should be taken when considering waterproofing that requires the permanent removal of the ground water to be effective. See BS8102:2009 Section 5. for further guidance.
• The land drain or perforated pipe to the base of an externally applied drainage membrane should be maintainable and graded to an open outlet below the level of the lowest slab. If risk of surcharge exists a John Newton pumped back flow protection device should be used. See BS8102:2009 Section 6.4 for further information.
• Land drains or perforated pipes should be maintainable. Include accessible jetting ports at regular intervals with at least one jetting port to each elevation.

• Should not be used to de water permanently high water levels. See BS8102:2009 Section 5. for further guidance.
• Should not be used as stand-alone product if water or damp and vapour control is required by the specification. Use in conjunction with a suitable Bayset membrane.

• Apply Bayset waterproofing membrane to walls in accordance with the product data sheets.
• Newton 408 EcoDrain is supplied in 2m wide sheets. If the foundation wall is less than 2m in height it is possible to fix Newton 408 EcoDrain horizontally with no laps. For walls over 2m fix Newton 408 EcoDrain in vertical sheets with the Geotextile fabric layer facing the operative and the black drainage layer against the wall being treated. Ensure that the membrane is fitted level. Secure the membrane to the wall with Newton MultiPlug at the top of the sheet. Drill 10mm holes 70mm into the substrate and hammer home the plugs with a club hammer.
• Overlap subsequent sheets of Newton 408 EcoDrain ensuring that the filter fabric of the next sheet overlaps the previous studded core - a section of filter fabric is separated from the drainage core for this purpose.
• Seal the edges of sheets using the 60mm flat flange at the edge of each sheet using Newton Waterseal Tape.
• Place Newton Geopipe slotted drain to the base of the foundation so that the top of the drain is below the top of the internal slab level. Place the drain within a bed of clean graded 20mm stone surrounded by a sheet of Newton Geotex filter fabric ensuring that enough Geotex is available to lap to the Newton 408 EcoDrain to give continuity of the filter fabric.
• Ensure the Geopipe drains freely to a safe collection point. If gravity drainage is to be used ensure that the drainage terminates below the level of the internal slab so that drainage surcharge cannot prevent the removal of water from the system. If gravity drainage is not available, discharge the Geopipe to a Newton sump system - a full range is available with chambers of 1.2m to 4.5m depth.
• Seal the Geotex fabric surrounding the Geopipe and clean stone to the filter fabric face of the Newton 408 Ecodrain with Newton Waterseal tape, or alternatively carefully place the filter fabric to the face of the Newton 408 EcoDrain so that it is held in place by the back fill.
• Use Bayset Pressure Seal to the top edge of the membrane to prevent debris and back-fill from entering the cavity between the drainage core and the filter fabric.
• Carefully backfill the excavation. If the removed soil is reused, ensure that it does not contain sharp stones and ensure that the soil is compacted every 600mm.

• Newton Geopipe
• Bayset Pressure Seal
• Newton Geotextile
• Newton Waterseal Tape
• Newton MultiPlug