Product Data Sheet Safety Data Sheet Show all documents
Drainage Composite 3811R

Drainage Composite 3811R

Drainage Composite 3811R is a prefabricated drainage composite

Drainage Composite 3811R is a high quality prefabricated drainage composite designed to protect the waterproofing membrane and provide continuous free flow of water in horizontal applications such as green roofs, plaza decks, planters and earth sheltered structures.

  • Excellent resistance to biological and chemical degradation
  • Ideal for soil environments
  • Compatible with electronic leak detection systems
 
Product Data Sheet Safety Data Sheet Show all documents

Usage

To create an open flow path to evacuate water from the system even under high loads.

AREAS OF APPLICATION
  • Green Roofs
  • Plaza Decks
  • Planters
  • Sheltered Structures
 

Advantages

  • Excellent resistance to biological and chemical degradation
  • Ideal for soil environments
  • Compatible with electronic leak detection systems
 

Packaging

39" x 100 ft (1.0 m x 30.5 m) roll, 77 lbs (34.9 kg) per roll

Colour

  • Top Fabric: Black
  • Core: Black
  • Bottom Fabric: Gray

Product Details

Product Information

Chemical Base

  • Post-industrial recycled polypropylene drainage core of fused, entangled filaments and a polypropylene geocomposite fabric bonded to the top side and a PA6 & polyester geocomposite fabric bonded to the bottom side
  • Entangled filaments are molded into an open square waffle pattern

Recycled Content

40%

Shelf Life

N/A

Storage Conditions

N/A

Thickness

0.45" (11.43 mm)

Unit weight

Core Weight: 16 oz/yd2 (542.6 g/m2)
 

Top Fabric

Bottom Fabric

4.5 oz/yd2 (152.6 g/m2)

3.54 oz/yd2 (120 g/m2)
Technical Information

Resistance to Static Puncture

Top Fabric

Bottom Fabric

70 lbs (0.31 kN)

35 lbs (155 N)

Tensile Strength

Top Fabric

Bottom Fabric

120 lbs (0.54 kN)1

125 lbs (556 N)1

1 Machine Direction and Cross Machine Direction

Resistance to Tearing (nail shank)

Top Fabric

Bottom Fabric

50 lbs (0.22 kN)

40 lbs (177.9 N)

Water permeability

Top Fabric

Bottom Fabric

1.8 sec-1

2.5 sec-1

Design Considerations

Compressive Load1

>30,000 psf (1436 kN/m2) / No failure2

1 ASTM D-1621 modified and ASTM D-4716.

2 Failure defined as reaching yield point or no continued measurable flow under stated load.

Opening size

Top Fabric

Bottom Fabric

70 US Sieve (0.212 mm)

45 US Sieve (0.357 mm)

Flow Rate

Top Fabric

Bottom Fabric

120 gal/min/ft2 (81.5 L/sec/m2)

185 gal/min/ft2 (125.6 L/sec/m2)

Application

Application steps

APPLICATION

Drainage Composite 3811R is installed by an authorized Sika Sarnafil Waterproofing Applicator. The drainage composite is loosely laid over the completed waterproofing system. Butt drainage composites together and unfold the 3" (76 mm) fabric overlap onto the top of the adjacent composite to provide continuity. Tape or adhere all fabric overlaps, and tape all butt end joints. Cut drainage composite neatly to fit around penetrations and projections.

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