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Green Roofs
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Drainage Channels
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GREEN ROOF COMPONENTS

Following is a description of key Optigreen green roof components. We stock limited quantities of all products in our Baltimore warehouse. Please contact us for pricing

Optigreen Separation Fabric is a non-woven geotextile made from recycled polypropylene. Since it is significantly less likely to clog than common filter fabrics, it is ideal for separating green roof soils from underlying drainage media or drainage plates. Optigreen Separation Fabric weighs approximately 200 g/m2 (6 oz/yd2). Rolls measure 2m x 25m (6’8” x 82’) and cover approximately 500 square feet of roof with a 15 cm (6”) overlap.

 

Optigreen Standard Protection Mat is a non-woven geotextile made from recycled polypropylene. It is puncture resistant and has a water storage capacity of 4 l/m2 (0.10 gal/ft2), making it ideal for protection and supplemental water storage under plastic drainage plates. Optigreen Standard Protection Mat weighs 500 g/m2 (15 oz/yd2). Rolls measure 2m x 25m (6’8” x 82’) and cover approximately 500 square feet of roof with a 15cm (6”) overlap.

 

Optigreen Heavy-Duty Protection Mat is a non-woven geotextile made from recycled polypropylene. It is extremely puncture resistant and has a water storage capacity of 6 l/m2 (0.15 gal/ft2), making it ideal for protection and supplemental water storage under granular drainage media. Optigreen Heavy-Duty Protection Mat weighs 900 g/m2 (27 oz/yd2). Rolls measure 2m x 15m (6’8” x 49’) and cover approximately 300 square feet of roof with a 15cm (6”) overlap.

 

Optigreen Capillary Protection Mat is a non-woven geotextile made from a blend of rayon and recycled polypropylene. It has an exceptional water storage capacity of 9 l/m2 (0.22 gal/ft2) and can wick water and distribute it evenly, making it ideal for use under granular drainage media on extensive roofs. Optigreen Capillary Protection Mat weighs 900 g/m2 (27 oz/yd2); rolls measure 2m x 15m (6’8” x 49’) and cover 300 square feet of roof a 15cm (6”) overlap.

 

Optigreen Drainage Mat is a multi-layer fabric mat made from a blend of polypropylene and acrylic. It combines the functions of a separation fabric, protection mat, and drainage system into one product that has a water storage capacity of 6 l/m2 (0.15 gal/ft2). It is ideal for use on extensive roofs with slopes from 1:12 to 3:12. Optigreen Drainage Mat weighs 800 g/m2 (24 oz/yd2); rolls measure 2m x 10m (6’8” x 33’) and cover 200 square feet of roof with a 15cm (6”) overlap.

 

Optigreen Inverted Roof Fabric is a non-woven geotextile specially designed for use over high-density extruded polystyrene insulation that is applied over a waterproofing membrane. It prevents soil from penetrating the insulation, but it is breathable and does not hold water that could lead to loss of thermal value in the insulation. Rolls measure 2.25m x 100m (7’6” x 328’) and cover 2300 square feet of roof with a 15cm (6”) overlap.

 

Optigreen 25mm Drainage Plate is a 1" thick waffled plastic sheet made of recycled polypropylene. The upper side of the sheet stores 5 l/m2 water (0.12 gal/ft2) and the lower space serves as a high-volume drainage passageway. Water only fills to the midpoint of the sheet, leaving an air gap under the separation fabric. Sheets measure 1m x 2m (40” x 80’) and cover approximately 21.5 square feet of roof, or 20 square feet of roof with a minimal overlap.

 

Optigreen 40mm Drainage Plate is a 1-1/2" thick waffled plastic sheet made of recycled polypropylene. The upper side of the sheet stores 7 l/m2 water (0.17 gal/ft2) and the lower space serves as a high-volume drainage passageway. Water only fills to the midpoint of the sheet, leaving an air gap under the separation fabric. Sheets measure 1m x 2m (40” x 80’) and cover approximately 21.5 square feet of roof, or 20 square feet of roof with a minimal overlap.

 

Optigreen Drain Box is a sturdy plastic roof drain cover made of black recycled ABS. Slots on the sides and top allow water to flow freely but retain soil and drainage media. A 12” (30cm) diameter hole in the base plate provides unobstructed drain access. Each Drain Box includes a top, base, and set of 4” (10cm) sidewall elements. Additional sidewall extensions allow heights up to 32” (80cm) in 4” increments to accommodate any extensive or intensive roof.

 

Optigreen Sidewall Extensions, made of black recycled ABS plastic, can be separated or stacked to extend the height of Optigreen Drain Boxes up to 32” (80cm). Each extension consists of four 4” (10 cm) sections that are molded together but can be separated as needed. When extensions are stacked, joints on adjacent sides must be staggered. Assemblies taller than 16” (40cm) should be screwed together through the holes provided at each corner.

 

Optigreen Triangular Drainage Channels are black recycled ABS plastic drainage elements with rows of slots on each side. They can be embedded in granular drainage media in order to carry excess water to roof drains or scuppers, and can also be used in reverse for flood irrigation of intensive roof systems with granular media. Each element is 1m (40”) long and 50mm (2”) tall. The unique triangular cross-section provides optimal surface area and prevents the channel from floating upward. Interlocking ends permit 45° rotation to the left or right.

 

Optigreen Triangle Tees are black recycled ABS plastic drainage elements with slotted sides and round end connectors. They are used to join Optigreen Triangular Drainage Channels in order to make drainage manifolds. The unique end design permits 45° rotation to the left or right and requires no tools for assembly. Optigreen Triangle Tees share the unique triangular cross-section of the channels to prevent upward flotation in granular media when used on extensive roofs.

 

Optigreen Aluminum Edge is made from a 1.5mm (0.060”) tempered aluminum alloy. It is used to retain soil and at roof edges or to separate soil from gravel and pavers. Holes on the vertical leg provide ample drainage while retaining soil. It is available in 2m (6’8”) lengths in heights of 100mm (4”), and 150mm (6”), both with extra-wide 150mm (6”) bases punched with large holes to permit taping or welding to underlying membranes.

 

inside flange

outside flange

Optigreen Aluminum Corners are made from a 1.5mm (0.060”) tempered aluminum alloy. They are used to make strong, attractive 90° connections with Optigreen Aluminum Edge. They are available in heights of 100mm (4”), and 150mm (6”), both with extra-wide 150mm (6”) bases. External-Flange Corners are typically used around skylights and roof drains, Internal-Flange Corners are typically used at roof perimeters.

 

Optigreen Aluminum Connectors are made from a 1.0mm (0.040”) tempered aluminum alloy. They slide into the top and bottom folds found in Optigreen Aluminum Edge and Optigreen Aluminum Corners to make secure, invisible connections. They are available in heights of 100mm (4”), and 150mm (6”).

 

Optigreen Anti-Slip Cleats are black recycled ABS plastic soil retaining elements used with Optigreen Anti-Slip Mesh to prevent soil from sliding down sloped green roofs by transferring soil loads to the top of the roof. If the roof is gabled or barrel-shaped, one side of the roof can be used to balance the other; otherwise the mesh must be mechanically fastened at the top of the roof. Rows of cleats are spaced 10” to 50”, depending on the roof slope.

 

Optigreen Anti-Slip Mesh is an extraordinarily strong structural plastic mesh used with Optigreen Anti-Slip Cleats to prevent soil from sliding down sloped green roofs by transferring soil loads to the top of the roof. If the roof is gabled or barrel-shaped one side of the roof can be used to balance the opposite side; otherwise It must be mechanically fastened at the top of the roof.

 

Optigreen Anti-Slip Lower Tees are used with Optigreen Anti-Slip Upper Tees to prevent soil from sliding down sloped green roofs by transferring soil loads to a structural parapet or fascia at the bottom of the roof. They are made of thick recycled polyethylene and are pre-notched to accept the upper tees. Lower tees are installed to follow the slope of the roof and are spaced approximately 1m (40”) apart. Standard lengths are 2.15m (7’1”) and 3.25m (10’8”).

 

Optigreen Anti-Slip Upper Tees are used with Optigreen Anti-Slip Lower Tees to prevent soil from sliding down sloped green roofs by transferring soil loads to a structural parapet or fascia at the bottom of the roof. They are made of thick recycled polyethylene and are pre-notched to drop into the lower tees. Upper tees are installed to cross the slope of the roof and are spaced 25cm to 125cm (10” to 50”) apart, depending on the roof slope. Standard lengths are 1m (40”).

 

Optigreen Extensive Roof Fertilizer is a slow-release fertilizer specifically formulated to meet the nutritional requirement of sedums on extensive green roofs. Apply it twice yearly beginning the second year, typically in April and July, at the rate of 4lbs per 1000 square feet. Standard bags contain 55lbs and cover approximately 14,000 square feet.

 

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