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HYDRODUCT® 401/ 501

Verified by manufacturer over a year ago

Hydroduct® 401

GCP Applied Technologies Variant:

Geocomposite drainage sheets.

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For horizontal roofs and decks. Suitable for draining and irrigating green roofs or planter boxes. Principal applications:

  • Conventional green roofs;
  • Low maintenance green roofs;
  • Landscaped inverted roofs;
  • Concrete decks with planted areas;
  • Podium deck planter boxes.


Polypropylene non-woven filter fabric on one face of an 12 mm studded drainage core with a separation geotextile bonded to the other face. For low and regular maintenance green roofs and planter boxes with minimum falls of 1 in 80.

Features and benefits:

  • Polystyrene has minimal creep under long term loading.
  • Fully compatible with GCP waterproof membranes.
  • Provides additional factors of safety against water penetration through roof decks.
  • Range of filter fabrics to cover hard and soft landscaped finishes.
  • Range of compressive strength cores to suit different loading and trafficking conditions.
  • Provides an efficient, low cost drainage plane to horizontal roof decks.
  • Geotextile filter fabrics prevent soil particles entering drainage core.
  • Rot proof.
  • Easy installation.
  • Provides both water discharge and retention functions for low and regular maintenance green roofs.

General information


A variety of surface finishes can be laid directly on top of HYDRODUCT® drainage sheets, dependent on deck use. Contact GCP Technical Services for further guidance.





Pr_25_57_65_60 Plastics sheetsPrimary


Q37/350 Drainage layer

Q37/355 Combined layers

Specification data - Plastics sheets




Drainage layer.

Performance characteristics


Tensile strength (minimum)

MD, >7 kN/m / CMD, >7 kN/m.



Physical properties


Weight (minimum)

41 kg.



Thickness (minimum)

12 mm.

Width (minimum)

1.25 m.

Roll length (minimum)

20 m.

Product Reference

Hydroduct® 401

Hydroduct® 501

Typical compressive strength

700 kN/m².

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