High Flow Drainage High Flow Green Roof Solutions


Green Roof Membrane has ¾” (20mm) dimples, which provides permanent protection. It is a long lasting separating layer that controls moisture and heavy water flow. Used in commercial and industrial mining and road construction, including tunnels. This membrane meets extreme water flow requirements.

High Flow Drainage

Toll Free: 1-800-571-1877          info@superseal.ca

Product Non-Perforated & Perforated

SUPERSEAL Green Roof Drainage is made out of a 40-mL or 50-mL polyethylene membrane with ¾ inch (20mm) high dimples, with approximately 400 dimples per m² to ensure maximum drainage and pressure equalizing ventilation under even the most difficult of conditions. In Green roof and garden applications, water can be stored in over 400 reservoirs per m². Excess water is drained off through perforations provided in the membrane. Green house horticultural seedlings can be started during early growth periods in sheet sizes that can be ordered to suit. Green Roof Drainage can be placed dimples facing up to secure soils or gravel beds in situations where there is a high level of mud or undesirable soils.

Product Advantages
  • Forms a watertight yet flexible barrier around the surfaces to be protected.
  • Available in perforated and non perforated and in sheets or rolls.
  • The 20mm high cone shaped dimples spaced at approx. 60mm centres in both directions ensures a high flow drainage capacity of up to 36,000 l/h/m.
  • Provides additional thermal insulation of the structure.
  • Tough and durable with a high compression strength of 3200psf (150 kN/m²).
  • Resistant to a wide range of chemicals, impervious to root penetration, rot-proof and unaffected by soil bacteria, fungi and alkaline environments. It also ensures good root aeration in green applications.
  • Environmentally friendly and can be ordered approved for drinking water applications.
  • The air gap is able to perform as damp pressure equalizing, ventilating or drainage.
  • Can be ordered with a fire rating class of DIN 4102 B2 or optional B1 class.
  • Mechanical protection and drainage of waterproofing membranes in tunnels.

For detailed instructions for your application please call us at 1-800-571-1877 or email us at info@superseal.ca


Green Roof Spec Sheet

Dimpled Sheet
High Density Polyethylene (HDPE)
Compressive Strength
3,200 psf (150 kN/m² )
Drainage Capacity
6,000 l/h/m
Dimple Height
.79″ (20mm)
Membrane Thickness
40mil (1.0mm)

High Flow Membranes

Standard USA Shipping: 3-5 days                 Standard Canada Shipping: 5-7 days
What is SUPERSEAL Green Roof Drainage?

SUPERSEAL Green Roof Drainage is an environmentally friendly, 40-mL polyethylene membrane with ¾“ high and 1 5/8″ wide dimples, ensuring constant maximum drainage and insulation under even the most difficult conditions. The air gap is able to perform as damp pressure equalizing, ventilating, or drainage. SUPERSEAL Green Roof Drainage is resistant to a wide range of chemicals, impervious to root penetration, rot-proof, and unaffected by soil bacteria, fungi, and alkaline environments. For green roof and landscape applications, the membrane ensures excellent root aeration and is approved for drinking water applications. It is available perforated and non-perforated.

What is SUPERSEAL Green Roof Drainage used for?

SUPERSEAL Green Roof Drainage provides reliable full surface drainage in tunnels, retaining walls, lagging walls, earth shelters, and other underground structures exposed to heavy groundwater flow. It is also used for land bank stabilization and drainage in conjunction with shotcrete, highway construction, bridges, plaza decks, green roofs, and seedling nursery.

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Rolls & Accessories:

For Higher Volume orders contact us directly at info@superseal.ca

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