Retention & Aeration – Barrett Company

Terra-DRAIN™ NF-10

jason.pribble@keenebuilding.com — Fri, 17 Apr 2026 15:26:24 +0000

Terra-DRAIN NF-10 (Needled Felt) is a 0.75” (10 mm) thick water retention and drainage mat engineered to optimize green roof performance and enhance your project’s sustainability. Designed with a proprietary blend of 100% recycled, low/ mid-denier fibers, this mechanically bonded needled felt mat enhances capillary action for efficient water absorption and distribution, ensuring consistent moisture availability for rooftop vegetation.

Built for durability, flexibility, and long-lasting performance, Terra-DRAIN NF-10 is a sustainable solution made from 100% recycled materials. It improves stormwater management, mitigates urban heat island effects, and supports biodiversity in green roof applications.

BENEFITS:

High capillary action allows for improved drainage and stormwater runoff
Self-extinguishing material
Resistant to chemicals, mildew, and bacteria
100% recycled material
Strong acoustic and thermal insulation
Strong acoustic and thermal insulation

USES:

Green roofs
Vegetative roofs
Garden roofs
Under slab drainage
Assemblies requiring water
Retention and/or filtration

INSTALLATION:

Butt boards tight together
Cover boards with overburden immediately to protect from UV rays & wind uplift

COVERAGE:

300 sq/ft

Terra-DRAIN™ P-60

Beau Kuhn — Thu, 18 Aug 2022 14:53:56 +0000

Terra-DRAIN P-60 (Panel) is a 2.4” (60 mm) thick, semi-rigid, waffled HDPE sheet designed to retain water within pockets on the top side for vegetation while channeling surplus water through its bottom-sided canal system for secure drainage. It has drill holes to drainage channels for diffusion and irrigation.

Terra-DRAIN P-60 allows for the incorporation of a complete array of zone-appropriate plantings, including shrubs and trees, in a greater than 12” depth assembly.

FEATURES:

Is a high-density plastic panel that retains water within pockets on the upper side, making water available to vegetation.
Has drill holes to drainage channels for diffusion and irrigation.
Channels surplus water through its bottom-sided canal system for secure drainage.
Allows for the incorporation of a complete array of zone appropriate drought tolerant plantings; in a greater than 12″ depth assembly.
Transfers loads uniformly to the substructure via large contact areas.

USES:

Intensive green and vegetative roofs with zone-appropriate plantings, including shrubs and trees
High load capacity systems that harvest stormwater
Unfilled installation under intensive green roofs with substrate height up to 400 mm
Protected membrane roofs
Inverted roof membrane applications (IRMA)

INSTALLATION:

Butt boards tight together
Cover boards with overburden immediately to protect from UV rays & wind uplift

Terra-DRAIN™ P-40

Beau Kuhn — Wed, 17 Aug 2022 20:27:05 +0000

Terra-DRAIN P-40 (Panel) is a 1.6” (40 mm) thick, semi-rigid, waffled HDPE sheet designed to retain water within pockets on the top side for vegetation while channeling surplus water through its bottom-sided canal system for secure drainage. It has drill holes to drainage channels for diffusion and irrigation.

Terra-DRAIN P-40 allows for the incorporation of a complete array of zone-appropriate perennials and ornamental grasses in a 6” – 12” depth assembly.

FEATURES:

Is a semi-rigid waffled plastic sheet that retains water within pockets on the upper side, making water available to vegetation.
Has drill holes to drainage channels for diffusion and irrigation.
Channels surplus water through its bottom-sided canal system for secure drainage.
Allows for the incorporation of a complete array of zone appropriate perennials and ornamental grasses; in a 6″ to 12″ depth assembly.

USES:

Semi-intensive green and vegetative roofs with zone-appropriate perennial and ornamental grasses
Extensive green roofs with increased layer structure (nature roof up to 250 mm)
Simple intensive green roofs with low layer structure (garden roof up to 300 mm)
Protected membrane roofs • Inverted roof membrane applications

(IRMA)

INSTALLATION:

Overlap boards by one cup
Cover boards with overburden immediately to protect from UV rays & wind uplift

Roofscape® RND 1.0 HS

Beau Kuhn — Wed, 17 Aug 2022 19:07:18 +0000

Roofscape® RND 1.0 HS (Retention & Drainage) is a 1.06″ thick high-strength semi-rigid waffled plastic sheet designed for retention & drainage on extensive vegetated roofs requiring moderate water storage.

FEATURES:

Is a semi-rigid waffled plastic sheet that retains water within pockets on the upper side, making water available to vegetation.
Has drill holes to drainage channels for diffusion and irrigation.
Channels surplus water through its bottom-sided canal system for secure drainage.
Allows for the incorporation of a complete array of zone appropriate drought tolerant plantings.

USES:

Vegetative roofs with high pressure loads using a complete array of zone appropriate drought tolerant plantings.

INSTALLATION:

Overlap boards by one cup
Cover boards with overburden immediately to protect from UV rays & wind uplift

Terra-DRAIN™ P-25 save

Beau Kuhn — Wed, 17 Aug 2022 18:56:37 +0000

Terra-DRAIN P-25 (Panel) is a 1” (25 mm) thick, semi-rigid, waffled HDPE sheet designed to retain water within pockets on the top side for vegetation while channeling surplus water through its bottom-sided canal system for secure drainage. It has drill holes to drainage channels for diffusion and irrigation.

Terra-DRAIN P-25 (Panel) allows for the incorporation of a complete array of zone-appropriate, drought-tolerant plantings in a less than 6” depth assembly.

FEATURES:

Is a semi-rigid waffled plastic sheet that retains water within pockets on the upper side, making water available to vegetation.
Has drill holes to drainage channels for diffusion and irrigation.
Channels surplus water through its bottom-sided canal system for secure drainage.
Allows for the incorporation of a complete array of zone appropriate drought tolerant plantings; in a less than 6” depth assembly.

USES:

Extensive green roofs
Protected membrane roofs Inverted roof membrane applications (IRMA)
Under path surfaces with > 60 mm substructure

INSTALLATION:

Overlap boards by one cup
Cover boards with overburden immediately to protect from UV rays & wind uplift

Terra-DRAIN™ DD-10

jpb@keenebuilding.com — Mon, 04 May 2020 15:23:50 +0000

Terra-DRAIN DD-10 (Dimpled Drain) is a 10 mm (0.5” nominal) perforated, dimpled composite polystyrene water retention, aeration, and drainage component with a sheet of needle-punched, non-woven polypropylene fabric adhered on both sides. It is designed to be used in green roof and planter configurations.

The plastic core of Terra-DRAIN DD-10 is perforated to allow for water vapor and air to migrate upwards from lower assembly components. Its adhered fabric cover allows excess water to flow from the growing media into the water storage cups while preventing the growing media sediment from entering. There is a selvage edge of extra top fabric along one side of the component that creates an overlap on adjacent components. This prevents migration of growing media downward into underlying layers.

USES:

Green roofs
Landscaping
Commercial planters
Retaining walls

COVERAGE:

200 sq. ft.

PACKAGING:

48" X 50'
8 rolls per pallet
40 lbs per roll

Terra-DRAIN™ EN-6

jpb@keenebuilding.com — Mon, 04 May 2020 15:13:35 +0000

Terra-DRAIN EN-6 (Entangled Mesh) is a 6 mm (0.25”) thick prefabricated drainage mat designed to provide drainage and aeration underneath growing media for green roofs, planters, and landscape assemblies.

The core consists of an extruded matrix of patterned polypropylene which is heat-welded to a non-woven polyester filter fabric. There is a selvage edge of extra top fabric along one side of the component that creates an overlap on adjacent components. This prevents migration of growing media downward into underlying layers.

USES

Plaza decks
Green roofs
Under slab drainage
Foundations
Commercial planters
Balconies

Coverage: 400 sq. ft.

Packaging:

48" x 100'
8 rolls per pallet
53 lbs per roll

Retention & Aeration – Barrett Company

Terra-DRAIN™ NF-10

Built for durability, flexibility, and long-lasting performance, Terra-DRAIN NF-10 is a sustainable solution made from 100% recycled materials. It improves stormwater management, mitigates urban heat island effects, and supports biodiversity in green roof applications.

BENEFITS:

High capillary action allows for improved drainage and stormwater runoff

Self-extinguishing material

Resistant to chemicals, mildew, and bacteria

100% recycled material

Strong acoustic and thermal insulation

Strong acoustic and thermal insulation

USES:

Green roofs

Vegetative roofs

Garden roofs

Under slab drainage

Assemblies requiring water

Retention and/or filtration

INSTALLATION:

Butt boards tight together

Cover boards with overburden immediately to protect from UV rays & wind uplift

COVERAGE:

300 sq/ft

Terra-DRAIN™ P-60

Terra-DRAIN P-60 allows for the incorporation of a complete array of zone-appropriate plantings, including shrubs and trees, in a greater than 12” depth assembly.

FEATURES:

Is a high-density plastic panel that retains water within pockets on the upper side, making water available to vegetation.

Has drill holes to drainage channels for diffusion and irrigation.

Channels surplus water through its bottom-sided canal system for secure drainage.

Allows for the incorporation of a complete array of zone appropriate drought tolerant plantings; in a greater than 12″ depth assembly.

Transfers loads uniformly to the substructure via large contact areas.

USES:

Intensive green and vegetative roofs with zone-appropriate plantings, including shrubs and trees

High load capacity systems that harvest stormwater

Unfilled installation under intensive green roofs with substrate height up to 400 mm

Protected membrane roofs

Inverted roof membrane applications (IRMA)

INSTALLATION:

Butt boards tight together

Cover boards with overburden immediately to protect from UV rays & wind uplift

Terra-DRAIN™ P-40

Terra-DRAIN P-40 allows for the incorporation of a complete array of zone-appropriate perennials and ornamental grasses in a 6” – 12” depth assembly.

FEATURES:

Is a semi-rigid waffled plastic sheet that retains water within pockets on the upper side, making water available to vegetation.

Has drill holes to drainage channels for diffusion and irrigation.

Channels surplus water through its bottom-sided canal system for secure drainage.

Allows for the incorporation of a complete array of zone appropriate perennials and ornamental grasses; in a 6″ to 12″ depth assembly.

USES:

Semi-intensive green and vegetative roofs with zone-appropriate perennial and ornamental grasses

Extensive green roofs with increased layer structure (nature roof up to 250 mm)

Simple intensive green roofs with low layer structure (garden roof up to 300 mm)

Protected membrane roofs • Inverted roof membrane applications

(IRMA)

INSTALLATION:

Overlap boards by one cup

Cover boards with overburden immediately to protect from UV rays & wind uplift

Roofscape® RND 1.0 HS

Roofscape® RND 1.0 HS (Retention & Drainage) is a 1.06″ thick high-strength semi-rigid waffled plastic sheet designed for retention & drainage on extensive vegetated roofs requiring moderate water storage.

FEATURES:

Is a semi-rigid waffled plastic sheet that retains water within pockets on the upper side, making water available to vegetation.

Has drill holes to drainage channels for diffusion and irrigation.

Channels surplus water through its bottom-sided canal system for secure drainage.

Allows for the incorporation of a complete array of zone appropriate drought tolerant plantings.

USES:

Vegetative roofs with high pressure loads using a complete array of zone appropriate drought tolerant plantings.

INSTALLATION:

Overlap boards by one cup

Cover boards with overburden immediately to protect from UV rays & wind uplift

Terra-DRAIN™ P-25 save

Terra-DRAIN P-25 (Panel) allows for the incorporation of a complete array of zone-appropriate, drought-tolerant plantings in a less than 6” depth assembly.

FEATURES:

Is a semi-rigid waffled plastic sheet that retains water within pockets on the upper side, making water available to vegetation.

Has drill holes to drainage channels for diffusion and irrigation.

Channels surplus water through its bottom-sided canal system for secure drainage.

Allows for the incorporation of a complete array of zone appropriate drought tolerant plantings; in a less than 6” depth assembly.

USES:

Extensive green roofs

Protected membrane roofs Inverted roof membrane applications (IRMA)

Under path surfaces with > 60 mm substructure

INSTALLATION:

Overlap boards by one cup