KoirPad™

Typical Applications

• Rapid restoration of disturbed sites
• Erosion control on steep slopes and high velocity channels
• Bioengineering planting media for live stake layering, live fascines and brush layering
• Biodegradable filter fabric in fabric wrapped soil construction
• Stream banks and shoreline stabilization
• Wetland remediation

Confirm the complete system design for high flow, wave exposure or steep slopes; product selection alone does not establish a safe design limit.

Prepare, place and secure the material

Site preparation

Grade and shape the installation area. Remove rocks, clods, wood and other obstructions so the material can remain in contact with the soil. Where a seedbed is required, loosen the upper 2–3 inches of soil; use soil amendments only as specified for the site.

Planting and seeding

Decide whether the material will be pre-planted in a nursery or planted on site. Coordinate species, plug spacing and handling with the planting plan. Where seeding is specified, complete it at the appropriate stage and reseed areas disturbed during anchoring.

Anchoring

The existing general installation guide uses U-shaped metal staples, at least 11-gauge and 6–12 inches long, or wooden stakes at least 12 inches long. Maintain at least 2 inches between the fabric edge and anchor center. Anchor type, depth and spacing must suit the soil and project design.

Inspection

Check soil contact, overlaps, anchors and plant establishment after installation and significant runoff. Repair lifting or displacement promptly.

Read the Installation Guidelines tab first. The details below are general guidance; use the project-approved layout and anchoring requirements for the selected material.

Installation on Slopes

Grade soil, fertilize and seed as per general Installation Guidelines tab.
Begin at the top of the slope and anchor blankets in a 12” deep and 12” wide initial anchor trench (see Fig.2) and anchor with staples at 18” spacing.
Unroll blanket down slope in the direction of the water flow (see Fig.1). The blanket should not be stretched but should have full contact with the soil. Anchor blanket using staples or stakes. See “Staple Pattern Guide for Slopes” below.
Overlap edges of adjacent parallel rolls by approximately 6” and anchor with staples at 24” to 36” spacing depending on the slope.
When blankets have to be spliced, place upper blanket end over lower blanket end (shingle style) with 12” overlap and anchor with two staggered rows of staples at 12” spacing.
Anchor, fill and compact ends of blankets in 12” deep and 6” wide terminal anchor trench. Anchor with staples at 18” spacing.

Staple Pattern Guide for Slopes

Figure 1

Figure 2

Figure 3

Figure 4

Read the Installation Guidelines tab first. The details below are general guidance; use the project-approved layout and anchoring requirements for the selected material.

Installation in Channels

• Grade soil, fertilize and seed as per general Installation Guidelines tab.
• Dig a 12” x 12” initial anchor trench at the upstream end (see Fig.4). If there is concentrated flow at channel entrance, it is recommended that the initial anchor trench be made at least 12” upstream from the pipe opening. It is also recommended to adopt measures to reduce the velocity of flow at pipe opening.
• Dig intermittent check slots (6” deep and 6” wide) across the channel at 25’ to 50’ intervals depending on the slope gradient of the channel (see Fig.5).
• Dig 6” deep and 6” wide longitudinal trenches at the top of side slopes to anchor the blanket edges (see Fig.6).
• Dig 12” deep and 12” wide terminal anchor trench at downstream end (see Fig.7).
• Install the first blanket in the initial anchor trench, upstream, in the center of the channel and anchor with two staggered rows of staples at 6” spacing, backfill and compact
• Do not stretch but make sure there is full contact between blanket and soil.
• In the same manner, position adjacent blankets in the initial anchor trench overlapping the preceding blanket a minimum of 8” and anchor.
• Unroll center strip downstream.
• Unroll adjacent mats downstream in a similar fashion, maintaining an 8” wide overlap. Anchor the overlapped area with staples at 16” to 18” spacing depending upon the flow velocity.
• For anchoring the middle of the blankets see “Staple Pattern Guide for Channels” below.
• Secure the edges of the blankets along the longitudinal trenches on the top of slopes with staples at 12” centers (see Fig.6).
• Fold and secure the matting snugly into all transverse check slots. Lay the matting in the bottom of the slot and then fold back against itself. Anchor through both layers of blanket at 6” intervals then backfill and compact soil (see Fig.5).
• For noncritical installations, place two staggered rows of staples at 6” spacing in lieu of check slots.
• When blankets need to be spliced, place upstream blanket over the downstream blanket with an overlap of at least 12”. Use two staggered rows of staples at 6”spacing.
• Anchor, fill and compact downstream end matting in terminal anchor trench (see Fig.7).

Staple Pattern Guide for Channels

Figure 1 Staple Pattern Guide For Channels

Figure 2 Staple Pattern Guide For Channels

Figure 3 Staple Pattern Guide For Channels

Figure 4 Staple Pattern Guide For Channels

Figure 5 Staple Pattern Guide For Channels

Figure 6 Staple Pattern Guide For Channels

Figure 7 Staple Pattern Guide For Channels

KoirPad™ 640 technical specifications

Typical product values are shown below. MD and CD mean machine and cross-machine directions. Use the current approved submittal for project acceptance.

Confirm the required roll length and current availability with Nedia.

Download the KoirPad™ 640 specification PDF