Protection & Drainage

Protecto-drain 8

Flexible protection and drainage layer

• Made from high density polyethylene (HDPE)
• Lightweight, flexible and durable
• Protects waterproofing membranes from abrasion or puncture
• Dimpled “egg-box” profile giving high compression strength
• High tearing and impact resistant
• Rot-proof, safe for drinking water
• Supplied in rolls of 2x 20m

Suitable for subterranean foundation walls, tanking and basement construction.

The 8mm deep cups provide an air gap between the concrete structure and the backfill. Water runs down the outer surface towards a drain at the bottom of the structure.

Creates a permanent air gap when fixed to surface walls and floors, preventing hydrostatic pressure and helping to ventilate the structural wall.

Fixing

• Nails pass through the membrane and don’t split the material
• Plugs seal the cups
• A cover profile fitted at the top prevents particles dropping behind the membrane
• Sheets can be bonded to the structural wall using bitumen based adhesive tape or fixed with nails and plugs
• Each sheet must overlap each other by at least 20cm for secure installation

Bonding sheets

• Can be bonded together to create one seamless watertight layer
• Can be fitted to floors to act as a vapour barrier and a damp proof layer

Storage & Handling

Protect against prolonged exposure to direct sunlight and temperatures over 25°C

Protecto-drain 20

Heavy Duty dimpled drainage sheeting for use in foundation walls, tunnels, bridges and civil engineering projects.

• Made from strong, flexible HDPE
• High compression strength with a dimpled (“egg box”) 20mm cup profile
• Cupped profile ensures a constant air gap between the layers of concrete
• Copes with larger quantities of ground water and drainage easily
• Used in both vertical and horizontal planes
• Does not pollute the water run off
• Rebar can be laid directly onto the membrane without damage and concrete can be poured directly onto it.
• Multiple sheets can be clipped into place by overlapping the cups and sealing joints with adhesive tape

Uses

• Heavier groundworks including tunnel lining and road construction
• Waterproofing and protection layer between layers of concrete
• To seal building envelopes on new build including foundations
• To manage and control subterranean water by channeling to effective drainage

By sticking to simple principles of not stopping water but redirecting it, hydrostatic pressure points are prevented.

Fixing

• Sheets are bonded together by overlapping cups and sealing with tape
• Can be taped with double sided tape or mechanically fixed with nails and special waterproofing plugs

Storage & Handling

Protect against prolonged exposure to direct sunlight and temperatures over 25 °C

Protecto-drain 20P

Heavy duty HDPE dimpled drainage board with drainage holes – suitable for green roofing

• Suitable for extensive green roof systems including sedum roofs, wildflower and biodiverse roofs, grasses and dwarf plants, with substrates up to a depth of 200mm
• For use on structural decks which have been fully waterproofed, protected and are capable to holding the weight of a saturated green roof
• Lightweight, tough yet flexible and can be shaped around objects
• Holds water within its profile to nourish vegetation above the filtration layer (5 litres per m2)
• Does not pollute the water run off

Application

• Laid horizontally onto geotextile filtration fabric beneath, with cups facing up
• Membrane overlapped and covered with loose laid geotextile filtration layer above, separating substrate from HDPE membrane
• Growing medium / substrate is laid on top
• Provides air gap to allow free-drainage of water
• Slows run-off of water but prevents waterlogging
• Water held in reservoir cups can be drawn up back into the substrate in dry periods
• Excess water dissipates through the perforations between each cup and through the drainage channel out into the outlet

Handling

• Supplied in rolls 2 x 20m
• Easy to transport and install
• Multiple sheets can be clipped into place by overlapping the cups and sealing joints with adhesive tape

Part of a comprehensive drainage system for roll-out extensive green roof systems. Designers need to be sure that the storage capacity and drainage flow rate is sufficient for the green roof type being constructed.

It is important to remember, however, that these materials do not alone provide a drought resistant system. Irrigation in dry or hot weather and regular maintenance is required for all roof gardens and green roofs.

Storage

Protect against prolonged exposure to direct sunlight and temperatures over 25 °C

Please see our green roof pages here Green Roof Systems for more details.

Protecto-drain G8

Flexible protection and drainage layer with geotextile bonded one side

• Made from high density polyethylene (“HDPE”)
• Geotextile fabric bonded to one side
• High compression strength with a dimpled (“egg box”) profile
• Protects vertical surfaces from damage whilst allowing free drainage of groundwater
• Used on the vertical plane for foundation walls
• Used as lining for planters
• Used on the horizontal plane for effective drainage of block paving
• Geotextile layer separates soil from the membrane whilst giving protection to the membrane
• Creates an air gap between the structure and the earthworks
• Lightweight and simple to use, easy to fix

For Foundation Walls

HDPE dimpled membrane with bonded geotextile fabric allows water to pass through the fabric but keeps soil particles in place. Water will drain downwards along the surface of the HDPE membrane towards the drain beneath.

• Protecto-drain G8 is installed with the geotextile fabric facing towards the soil backfill/shingle
• Water passes through geotextile and down through the 8mm air gap around the dimpled cups
• 100gsm geotextile membrane ensures consistent flow rate of water, prevents deluge
• Constant air gap is maintained, ensuring free flow and preventing clogging of the drainage channel beneath
• An effective drain – such as a French Drain – should be constructed at the bottom of the surface to allow water dissipation
• Prevents waterlogging, subsidence and rising damp
• Individual sheets can be fixed with double sided bitumen tape when installing on a vertical plane to ensure a seamless, water tight membrane

For Planters

• Ideal for lining planters and vegetated areas
• Installed with the geotextile fabric facing towards the soil
• Membrane is easily shaped around corners and details such as downpipes and outlets
• Can be cut and bonded easily to create seal around inside wall of planter
• Excess water passes through geotextile fabric to 8mm air gap and is channelled away
• Prevents clogging of the drainage outlet

For Use on the Horizontal Plane

• Used for effective drainage of block paving
• Good flood management on pedestrian areas
• Membrane is laid between the waterproofing and the block paving with the geotextile membrane facing upwards
• Paving slabs can be suspended on Wallbarn pedestals
• or Blocks can be laid directly onto the membrane and gaps filled with fine sand
• Water passes through geotextile fabric onto HDPE membrane below and along the top of the membrane towards the drain
• Sand filling on block paving is held in place on the geotextile and not washed away
• Prevents clogging of the drainage system and allows puddle free paving

Fixing – Vertical Plane

When installing onto a vertical surface, Protecto-drain G8 can be fixed with double sided bitumen tape .  Always ensure each sheet is overlapped by at least 20cm to ensure a watertight seal.

Fixing – Horizontal Plane

Lay membrane down with geotextile side facing up and overlay with sand / backfill. Seal each sheet securely with double sided Protecto-tape, ensuring a 20cm overlap, to ensure a watertight seal.

Storage & Handling

Protect against prolonged exposure to direct sunlight and temperatures over 25 °C

Drainage Channel

• Includes anti-slip galvanized steel grate
• Channels surface water to outlets
• Quick and easy installation
• 1m sections simply join together to create seamless channel
• Spring-loaded clips lock/release grate for easy maintenance
• Suitable for pedestrian and lightly trafficked areas
• CE marked and fully certified to Load Class A15 BS EN 1433
• Eco-friendly and 100% recyclable
• Accessory pack available for drainpipe connection (see below)

Applications:

• Domestic applications: driveways, gardens & patios
• Public areas: pedestrian walkways, recreational areas, schools, parks and playing fields

Dimensions

• Outer dimensions: 120mm high x 135mm wide
• Inner dimensions: 90mm high x 100mm wide

Material

• Channel: High Density Polyethylene (HDPE)
• Grate: galvanised steel

Connect individual channels together using tongue and groove section at each end to create longer drainage trenches

Locking clips

The locking clips make Wallbarn’s Protecto-drain Drainage Channel ideal for easy access and cleaning. The clips keep the steel grate securely in place but allow for easy access to the gutter section.

• There are two points in the steel grate where a pointed implement can be pressed down to release the spring-loaded side locking clips
• The steel grate can be lifted away from the channel easily
• No screws or fixings are involved

Accessories

• 2 x side bars to close the channel
• 1 x Ø110mm circular connecting bracket for underside of channel to link channel to drainpipe

Pro-drain 20G

Coming soon…

Pro-drain 40P

Coming soon…

Pro-drain 60P

Coming soon…