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Safeguard Basement System 2 – Basement Constructed Under Existing Structure - Underpinning

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

Safeguard Europe Ltd

Dual layer dig out basement waterproofing system.

Jump to:
+44 (0)1403 210204 www.safeguardeurope.com

For dig out basements underneath existing dwellings.


A dual layer waterproofing system comprising of a crystalline active tanking slurry and maintainable cavity drainage system.


  • Drybase® Crystalline Active Slurry.
  • Oldroyd Xv - Black, studded cavity drainage membrane.
  • Oldroyd Aquadrain - Perimeter drainage channel for basement waterproofing.
  • Sentry Sump Systems - Basement pumping system.
  • Oldroyd Xv20 - Black cavity drainage membrane with extra-large studs providing greater drainage and flow capacity than standard cavity drain membranes.
  • Oldroyd Sealing Rope.
  • Oldroyd Overseal Tape.


For dig out basements underneath existing dwellings.

General information
Specification data - Plastics studded membrane internal wall damp-proofing systems
Product Reference

Safeguard Basement System 2

Waterproofing slurry

Drybase® Crystalline Active Slurry

Cavity drainage membrane -

Oldroyd Xv and Oldroyd Xv20


Oldroyd Sealing Rope

Double sided butyl tape, 30 mm wide.

Oldroyd Overseal Tape

For sealing flange joints, 200 mm wide.

Perimeter drainage

Oldroyd Aquadrain


Sentry Sump System Pro 303 and Sentry UPS 3000 Battery Back-Up System

Special order

Insert requirements, more than one pumping system may be needed for larger projects, consult manufacturer for information.

Standard product features

Drybase® Crystalline Active Slurry:

  • Coats: Concrete slabs (under pressure): Brush, spray or dry sprinkle in one coat; concrete walls (under pressure): Brush or spray in two coats; construction joints: Brush in one coat.
  • Application rate: Concrete slab (under pressure): 1.2 kg/m² (one coat); concrete walls (under pressure): 1.5 kg/m² (two coats); construction joints (under pressure): 1.5 kg/m² (one coat).
  • CE marked to BS EN 1504-3.

Oldroyd Xv:

  • Thickness: 0.5 mm.
  • Stud height: 7 mm.
  • Compressive strength: 160 kN/m².

Oldroyd Aquadrain:

  • Size (w x h x l): 80 x 50 x 2000 mm.
  • Colour: Green.

Oldroyd Xv20:

  • Thickness: 0.8 mm.
  • Stud height: 20 mm.
  • Compressive strength: 100 kN/m².

Third party certifications
  • 00/3733
  • 18/5549
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