SIGMA GPS Drainage Sheet includes a high compressive strength Cuspate High Density Polyethylene (HDPE) Drainage core with a geotextile filter geotextile bonded to one side. SIGMA GPS Drainage Sheet is designed as a high flow medium to alleviate hydrostatic pressure on below ground structures, as well as providing protection to the underlying membrane (gas/waterproofing).

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SIGMA GPS Drainage Sheet (£ - POA)

Name: SIGMA GPS Drainage Sheet (£ - POA)
SKU: JUTAPD1700

SKU: JUTAPD1700

£0.01

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Color	Black
	Grey
Material	Polyethylene
Shape	Rectangular - supplied in roll form
Size	2 x 20 m x 8 mm
Warranty Description	60 year
Uniclass 2015	Pr_25_57_65_60 Plastics sheets
CAWS	J40/35 Loose laid plastics or rubber gas retardant damp proofing
	J40/140 Loose laid plastics or rubber sheet gas retardant damp proofing
	J40/145 Loose laid weldable polyethylene gas retardant damp proofing

Material	High density polyethylene and geotextile fleece.
Purpose	Protection layer.
	Drainage layer.
Standard	To BS 8102.
Performance characteristics
Tensile strength (minimum)	12 kN/m.
Elongation to break	12%.
Form	Drainage core with geotextile bonded to either side.
Physical properties
Colour	Black and Grey.
Weight (minimum)	620 g/m2
Dimensions
Thickness (minimum)	8 mm.
Width (minimum)	2 m.
Roll length (minimum)	20 m.
Recycled content	0%.

Characteristics	Test Method	Measurement
CBR Puncture Resistance	EN ISO 12236	1700 N
Tensile Strength (MD/CMD)	EN ISO 10319	12 kN/m
Tensile Elongation (MD/CMD)	EN ISO 10319	12 %
Compressive Strength	EN ISO 25619	140 kPa

Characteristics	Test Method	Measurement
Pore size (O90)	EN ISO 12956	100 μm
Permeability (H50)	EN ISO 11058	79 l/m2/s
In plane water flow	EN ISO 12958	1.83 l/s/m width i = 1.0 @ 20 kPa
(Hard/soft) platens	EN ISO 12958	1.69 l/s/m width i = 1.0 @ 100 kPa
(To simulate soil action)	EN ISO 12958	1.53 l/s/m width i = 1.0 @ 200 kPa
(i) Hydraulic gradient	EN ISO 12958	0.49 l/s/m width i = 0.1 @ 20 kPa
(i) = 1 simulates vertical application	EN ISO 12958	0.45 l/s/m width i = 0.1 @ 100 kPa
(i) = 0.1 simulates slope application	EN ISO 12958	0.45 l/s/m width i = 0.1 @ 200 kPa

Primarily used for external tanking applications, forming a high compressive strength void, providing a path of least resistance for water, which enables controlled drainage into outlets or connector pies. Its can be used in combination with GP gas/waterproofing barriers to provide both protection and drainage for external tanking application, ensuring gas/waterproofing barrier remains intact and the system performs as intended.
SIGMA GPS Drainage Sheet should be installed with the geotextile facing the soil/backfill, and the direction of water flow. Rolls can be cut to size on site. It can be held in place prior to backfilling with DS Butyl tape (50 mm wide), or mechanically fixed in the absence of a gas/waterproofing barrier.

Adjacent rolls can be overlapped using the geotextile, secured with DS Butyl tape (50mm). Roll ends can be connected by simply butting the cuspate sheet together.

Connection to land drains/collection pipes is achieved by placement within the slotted areas, or removal of the cuspated core and wrapping of geotextile around the pie. Care must be taken not to damage/cut the geotextile during core removal to facilitate the connection.

Backfilling should proceed with caution to avoid undue stress on the sheet. Compactive effort should be avoided within the first 100mm of the sheet.
Roll weights can be up to 35kg and hence appropriate equipment is required for unloading and handling. SIGMA GPS Drainage Sheet is supplied in packaging designed to protect the product from damage during handling and storage, and degradation as a result of UV exposure. SIGMA GPS Drainage Sheet should be kept in the supplied packaging until such time as it is required for installation, and then covered within 2 weeks of installation.
BBA Certificate 20/5728

CE

UKCA

UKNI

Country of material origin	Czechia
Country of product manufacture	Czechia

Characteristics	Measurement
Roll Width	2.00 m
Roll Length	20 m
Gross roll weight	30 kg

SIGMA GPS Drainage Sheet (£ - POA)

General Information

Specification Data Plastic Sheets

Environmental Information

Mechanical Properties

Hydraulic Properties

Physical Properties

Material Dimensions

Applications

Installation

Handling & Storage

Compliance & Certifications

Data Sheets

Characteristics	Test Method	Measurement
Mass per unit area	EN ISO 9864	620 g/m2
Thickness	EN ISO 9863-1	8.00 mm

SIGMA GPS Drainage Sheet (£ - POA)

General Information

Specification Data *Plastic Sheets*

Environmental Information

Mechanical Properties

Hydraulic Properties

Physical Properties

Material Dimensions

Applications

Installation

Handling & Storage

Compliance & Certifications

Data Sheets

Specification Data Plastic Sheets