Page 528 - Construction Waterproofing Handbook

15.12 CHAPTER FIFTEEN
3.04 DRAINAGE COURSE INSTALLATION (FILTER FABRIC/CORE)

A. Vertical Surfaces or Planters - MD-2000, MD-6000, MD-6200, MD-8000, or MD-9000
1. Completed Walls - Position the panel with the flat side against the wall and filter fabric toward the
soil/drainage side. A washer headed concrete nail may be used to attach the panel against the
concrete wall. Alternate methods of the attachments use concrete nails driven through wood
strips placed over the Miradrain or Mirastick construction adhesive. Most methods used to secure
protection board are acceptable.

2. Over Miradri Waterproofing Membrane - Place the Miradrain over the waterproofing membrane.
Use two sided Mirabond tape or Mirastick construction adhesive to secure the Miradrain to the
waterproofing membrane. Most methods used to secure protection board are acceptable.
3. Against Shoring Systems or Vertical Soil Excavations - Position the panel with the fabric facing the
shoring or soil. Nails of sufficient length should be used to pin the panel directly against the
shoring or soil. The fabric should lay flat against the shoring or soil to minimize voids. The flat
side of the Miradrain may then receive the waterproofing material. Concrete or shotcrete may be
placed directly against the waterproofing or back side of the Miradrain if waterproofing is not used.

4. Buttress Drainage and Landslide Repair - Miradrain should be rolled out fabric side down onto the
properly prepared subgrade. A "chimney" drain type drain pattern should be formed.

Spacing between Miradrain chimney drains will be dictated by the engineer. Chimney drains
should be connected to the continuous horizontal collector panel by overlapping a minimum of
12 inches into the collector panel.
Miradrain panels may be secured to the subgrade by ballasting with soil or nailing through the
Miradrain panel into the underlying hillside. Fabric flaps must be folded over onto the core and
secured with duct tape or soil ballast.

5. Edge Drain or Trench Drain -
Miradrain 5000 should be laid out in 50 foot lengths adjacent to the previously cut/excavated
trench.

Panel end laps may be connected by overlapping the panels and applying locking clips or
buttoning of the dimples. Flexible corrugated polyethylene or rigid PVC pipe, which has been
wrapped with Mirafi filter fabric should be placed in the bottom of the trench. The Miradrain panel
should be lowered into the trench beside the pipe and temporarily secured to the trench wall by
nailing or propping. The Fabric side of the panel must face the direction from which the water is
flowing. Fabric overlaps on the top of the Miradrain panels should be draped over the back of the
core. Backfilling should be completed immediately.

6. Connecting Adjacent Panels - Connect adjacent panels at the longitudinal edge by pulling the filter
fabric back to expose the flange. The flangeless panel edge should be placed on top of the flange
of the adjacent panel and butted dimple to dimple. All connections should be completed in
shingle fashion so that moisture will flow with the overlap and not against it. Overlap fabric in the
direction of water flow. Cover all terminal edges with the filter fabric flap by tucking in behind the
core.

B. Horizontal Surfaces - MD-9000 or MD-8000 (hydrocarbon-resistive applications)
1. Plaza Decks, Parking Decks, and other Split Slab Construction - MD-9000
FIGURE 15.1 (Continued) Guide specification for section 2715, prefabricated drainage system. (Courtesy TC MiraDRI)