SURFASDRAIN 20 Garden

SURFASDRAIN 20 Garden is a high-density polyethene (HDPE) membrane specifically designed for roof-gardens, the membrane has 20mm dimples that act as a water reservoir and 8mm perforations that allow excess water to filter away.

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How does SURFASDRAIN 20 Garden work:
The 20mm dimples on the drainage board retains the rainwater, this acts as a reservoir for the vegetation of the green roof, whilst the strategically located perforations in the membrane allows surplus water to filter away, preventing ponding of water on the roof.
How do I prepare the surface before applying SURFASDRAIN 20 Garden:
The complete surface of the roof should be fully waterproofed using Maxseal Flex.

Key Features & Benefits

  • High density polyethylene (HDPE)
  • 20mm dimples retain water that act as a reservoir for the vegetation
  • 8mm overflow perforations
  • Easy to install
  • Root and Root resistant
  • Withstands root penetration when overlaps are sealed with Overseal Tap
  • SGS Quality Management System according to ISO:9001

Specification Tip for Design Professionals:
SURFASDRAIN 20 Garden may be specified by name or by using the following description: a high-density polyethene (HDPE) specifically designed membrane for roof gardens. membrane with 20mm dimples that act as a water reservoir and perforations that allow excess water to filter away.

Test Results:

  • Quality System in accordance with ISO:9001

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Jamie Smyth

Quantity Surveyor

Jamie brings our team a wealth of knowledge in project costs management, from the cost and risk analysis to the preparation and submissions of tenders and valuations.


Jamie has spent over ten years working as a Quantity Surveyor with a background in the construction industry (from residential build to pharma projects). He has been involved in all aspects of construction collaborating with small builders and large contractors on projects of varying sizes and scale. All this contributed to his thorough understanding of the requirements and priorities when performing his tasks of a Quantity Surveyor.


On a personal note, Jamie enjoys playing soccer and is a true golf fanatic. He enjoys travelling and fine dining.

Dear Customers,

High performance Resin Flooring Solutions by Sherwin Williams are now available from SURFASOLOGY.

We offer seamless, resinous flooring systems that combine durability and design aesthetics. The product line covers a multitude of industries and areas of application, such as industrial & manufacturing, pharmaceutical & healthcare, food & beverage.

Are you currently working on a flooring project and looking for a solution? For advice and guidance, please contact us on 01 832 1005 or [email protected].

Your SURFASOLOGY Team