How to Install Wykamol Perimeter Drainage Channel

Installation overview — Type C perimeter channel with access points (illustration only)

1. What the channel does

Wykamol perimeter drainage channel collects water in a Type C cavity drain system from wall/floor membranes and conveys it to a sump & pump or other compliant discharge. Access/flush points provide serviceability for long-term performance.

2. Where it’s used

• Basements and retaining structures lined with CM8/CM20 membranes.
• At the wall–floor junction to intercept moisture entering the cavity.
• Along walls, around internal corners/columns, and across thresholds where designed.

3. Tools & materials

• Wykamol perimeter channel lengths & connectors (straights, corners, T-pieces)
• Access/inspection ports (flush points) and end caps
• Channel outlet to sump (spigot/adaptor) and pipework
• CM8/CM20 membranes, sealing rope & tapes, membrane plugs/washers
• Angle grinder/perc saw (for chases if required), hammer/chisel, drill
• Level, tape measure, marker, vacuum/brush
• PPE: gloves, eye/ear/respiratory protection

4. Preparation

• Confirm design intent: discharge location, pump specification, access port locations, and fall strategy (channels are typically laid level but unobstructed).
• Clean the wall–floor junction; remove laitance, debris and sharp projections.
• Plan runs to avoid dead-ends; every lined area must have a clear path to the sump.

5. Setting out & chases

• Mark the channel route around the perimeter. Allow for connectors at corners and tees leading to the sump.
• If required, cut a shallow chase/rebate in the slab at the junction so the channel sits flush below the finished floor build-up.
• Vacuum dust and ensure the base is level and free-draining toward the channel slots/inlets.

6. Installing the channel

1. Lay the first length starting near the sump position. Push-fit connectors fully; follow manufacturer tolerances.
2. Install access/flush ports at sensible intervals (e.g., each wall run, corners, and near the sump) for maintenance.
3. At tees/corners, ensure the internal profile remains clear—do not crush or distort the channel.
4. Cap dead ends with end caps only where unavoidable; avoid creating isolated sections.

7. Connection to sump & discharge

• Fit the channel outlet spigot/adaptor and run pipework to the sump chamber in the shortest, neatest route.
• Maintain accessibility to the non-return valve and future service components.
• All electrical/commissioning work for pumps must be completed by a competent, qualified person.

8. Integrating membranes

• Floor: Lay CM8/CM20 studs-down; form a perimeter upstand and terminate neatly at/over the channel as designed.
• Wall: Fix CM8/CM20 or CM3 Mesh to walls with plugs/washers; seal laps and interfaces with Wykamol Sealing Rope and tapes.
• Ensure the membrane pathway is unobstructed into the channel inlets/slots.

9. Vapour management & finishes

• Install the specified floor build-up (e.g., insulation + board or screed) without blocking access ports.
• On walls, use independent studs/linings; avoid bridging the cavity to the damp substrate.
• Coordinate ventilation/heating to control humidity in the finished space.

10. Commissioning & checks

1. Water test the system: introduce clean water at high points and observe flow to the sump.
2. Confirm pump start/stop levels, alarm (if fitted), and check all joints for leaks/obstructions.
3. Record access point locations and create a basic service plan (flush frequency, pump tests).

11. Common pitfalls

• Dead-end runs with no path to sump — always loop or tee into a live route.
• Blocking inspection/flush points with finishes — keep them visible/accessible.
• Debris in channels — keep runs clean during works; cap open ends until covered.
• Poor membrane integration — ensure sealed interfaces at the channel junction.

12. Product availability

All components referenced—Wykamol perimeter channel, access/flush ports, connectors, outlets, sump & pump kits, plus CM membranes, sealing rope, tapes and plugs—are available directly from Clever Shield Coatings. Use the website search bar or browse our product categories to find what you need.