VersiDrain® P-Anchor®

What is VersiDrain® P-Anchor®

VersiDrain® P-Anchor® is a lightweight under screed drainage mat installed between the structural slab and the screed. It drains entrapped water in the finishes’ cement screed via perforations in the mat to the drainage channel.

Implementing drainage within the floor layers reduces efflorescence that occurs due to the migration of water and salts from the screed to the floor surface. It also reduces cracking of the screed and the floor surface, caused by the pressure build-up from efflorescence.

  • Balconies, verandas & terraces
  • Podium, swimming pool & plaza decks
  • Patios
  • Changing & wash rooms
  • Pedestrian walkways
  • Interlocking for easy installation and continuous drainage
  • Perforations to drain water from the screed
  • Drainage channels to facilitate water flow into drainage outlets
  • Frusto-pyramidal openings for screed to bond with structural concrete
  • Minimises efflorescence & algae
  • Reduces cracks in the screed and flooring
  • Protects waterproofing membranes
  • Prevents salt accumulation in the screed and floor surface
  • Made from sustainable, recyclable material

Preparation of Installation Area

1.Ensure that substrate must be smooth and even.

2.Ensure that fall is towards drainage outlet/s.

3.Protect VersiDrain® P-Anchor® from excessive UV exposure by storing under tarpaulin or under shade when time from delivery to installation exceeds one week.

Lay Under Screed Drainage Mats

1.Position drainage mats with studs down directly on substrate/waterproofing membrane.

2.Align and snap on interlocking pins and corresponding interlocking holes of adjacent mats to form a continuous carpet over installation area.

3.Cut mats with shears to size or to fit into corners, plinth areas or curved areas, drainage gully or as necessary.

Geotextile, Wire Mesh & Cement Screed

1.Lay Geotextile according to project requirements.

2.Lay wire mesh above drainage mats according to project requirements.

3.Apply cement screed according to project requirements.

Material PP
Dimensions 500 mm x 500 mm
Height 6 mm
Weight ~3 kg/m2
Compressive Strength


Filled (Grade 20 c/s screed)


>80 tonnes/m2

>1,500 tonnes/m2

Pull out load >4 kN/m2
Service temperature -30°C to 80°C
Biological Resistance Unaffected by moulds and algae.
Chemical Resistance Resistant to rot, oils, acids, alkalis, bitumen, and naturally occurring soil chemicals