Green Roofs for Roof Gardens & Planters/Green Roofs/Gardens & Planters Roof

Specifications

Green Roofs for Roof Gardens & Planters,Green Roofs, Gardens & Planters Roof

 Green Roofs for Roof Gardens & Planters, Green Roofs, Gardens & Planters Roof

INTRODUCTION

The Problem

Since historic times, civil engineers and builders have used

crushed stone (aggregate) or a combination of stone and some

sort of pipe for soil drainage. While providing reasonably

satisfactory results, aggregate drainage has several drawbacks.

Clean and properly sized material is often expensive

or not readily available. Transportation is expensive due to

weight and volume. Quality control requires close monitoring

of material and construction. Waterproofing materials have

to be protected from damage from the aggregate and installation

equipment. Aggregate tends to clog with soil over time,

thereby reducing drainage capability. Despite great care in

the design and construction of aggregate drains, their limitations

often result in increased hydrostatic pressure, which

increases loads on the structure and allows moisture intrusion

into the structure.

The Solution

The availability of plastic geotextile filter fabrics in the 1960's

led to the development of prefabricated plastic drainage material.

This new type of drain, sometimes referred to as prefabricated

drain, combined the soil retention capability of

geotextiles with the water carrying capacity of specially

formed plastic drain cores. The result was new and cost

effective drainage materials for subsurface soil drainage.

Continual development over the past forty years has resulted

in today's prefabricated sheet drains that are now available

with a wide choice of size, compressive strength, flow rate,

filtration, and chemical resistance to suit virtually any drainage

application.

Prefabricated sheet drains have two components that act as

replacements to the aggregate system 1) The geotextile replaces

the aggregate function for water collection and allows

the water to enter the drain without clogging the core and 2)

the formed plastic core replaces the pipe function for transporting

the collected water. Sheet drains typically have a flat

back, which is placed against the underground structure. For

use against soft waterproofing materials, drains may have a

film attached to the backside to protect waterproofing material

from flowing into the back of the cones in the drain.

Water, which flows through the fabric and into the core, is

removed in several ways depending upon the drainage situation.

One of the newest methods is through the use of the DRAIN system, which has a

larger profile core at the bottom to serve as a high flow conduit

to move water to the designated drainage exits.

DRAINAGE SYSTEMS TO FIT YOUR

Foundation Walls

sheet drain used on the outside wall intercepts

ground water before it reaches the structure. Water is

easily routed by the TOTAL-DRAIN system to a discharge

pipe or sump. The sheet drain reduces hydrostatic pressure

load on the walls and slab, which may permit a less expensive

structure. Sheet drain also protects waterproofing and aids in

keeping moisture from entering the basement, as well as reducing

heat loss into the surrounding soil.

 

Horizontal, or a combination of horizontal and vertical

drain, may be used.

Landfill Caps & Underdrains

sheet drain intercepts rain water in the landfill

cap and routes it away from the landfill. Installing

sheet drain under or on top of the landfill liner

provides controlled exit of leachate.

Athletic Fields, Golf Courses, Playgrounds,

& Landscaping

The high flow capacity of AMERDRAIN sheet drain and

AKWADRAIN sheet drain makes it ideal for quick drainage

of playing fields and golf courses where early use after rains

is desired

Retaining Walls & Bridge Abutments

Use sheet drain to reduce hydrostatic pressure

from the backfill behind the wall and maintain the stability

the entire height of the wall.

 

Lagging & Shoring Walls

Where space is limited and valuable or where aggregate drainage

would be difficult to install, sheet drain can provide drainage with

 its small space requirement andlightweight material.

It can be attached directly to the wall

for full coverage or vertical strips based on drainage needs.

Parking & Plaza Decks

sheet drain is a cost-effective alternative to

aggregate for parking and plaza deck drainage. It is more

efficient and easier to handle than installing a typical aggregate

drainage system. AMERDRAIN sheet drain is quickly

and easily installed, and collects and transports water more

efficiently within a much more confined space. The use of

sheet drain under grouted brick or pavers in

driveways, prevent settlement and freeze-thaw problems

caused by saturated sub-base materials.

 

Shotcrete & Gunnite Walls

sheet drain in strips or with full coverage can

provide effective drainage for shotcreted walls. The formed

core provides a good surface for adhesion of reinforced

shotcrete or other construction materials.

Pond & Channel Liners

The installation of sheet drain under the channel

liner prevents uplift due to hydrostatic pressure. The chance

of structural failure, or leakage is also greatly reduced.

Earth, Rock & Rolled Concrete Dams

sheet drain may be used to prevent seepage

at the toe of the dam or as a vertical cutoff wall in the structure.

Slope stability during rapid draw down is also aided.

Tunnels & Box Culverts

Water can attack these structures from four directions: top,

bottom and either side. sheet drain provides

rapid removal of water to reduce hydrostatic pressure and to

reduce leakage into the structure. Reinforced shotcrete can

be applied directly to the sheet drain core.

Chimney Drains

sheet drain may be installed in vertical strips where

full coverage is not required.

GreenRoofs, Roof Gardens & Planters

Landscape architects sheet drain as a

lightweight replacement for aggregate drainage. The prefabricated

drain takes only ¼-1 (6-11mm) versus 4-6 (100-

150mm) for gravel, thereby leaving more room for soil. Hauling

gravel several floors up to a roof garden is avoided and lower

roof loads are possible.