CM Interior Basement Waterproofing System

Membranes, drainage and accessories for remedial interior isolation of damp basement walls and direction of surface water.

Water entering through walls is contained behind membranes and directed to drainage at base of wall.
Requires sump and pump or equivalent passive water disposal system. (Sumps and pumps specified separately).

Overcoating

Renders:

Suitable for overcoating with 1:6 sand:cement render, incorporating hydrated lime or Wykamol techno SBR Latex additive. Use Grade M medium sharp sand. Do not use soft sand or building sand.
Apply two coats. First coat 7–10 mm, left to harden for 7–10 days. Overall thickness 15–30 mm.

Gypsum plasters:

Suitable for overcoating with most gypsum backing plasters or renovating plasters, such as Tilcon Whitewall or Thistle Browning. Not suitable for use with Hardwall or Tuff coat.
Apply two coats. First coat 7–10 mm, left to harden for 7–10 days. Overall thickness 15–40 mm.

Lining

Suitable for lining with plasterboard on dabs as required by board manufacturer.

More about CM Interior Basement Waterproofing System

Guidance for CM Interior Basement Waterproofing System from Wykamol Group

Membrane

Not suitable for horizontal soffits.

CM 8:

Fix to wall using brick plugs wrapped with rope seal. Lap joints and seal with tape.
For floors, lay with studs downwards. Lap joints and seal with rope seal.
Fix to soffit using brick plugs wrapped with rope seal. Lap joints and seal with tape.

CM Plaster Mesh

Fix to wall using plaster plugs wrapped with rope seal. Lap joints and seal with tape.

Drainage

Aqua Channel:

PVC drainage profile for perimeter drainage of basements. Designed for drainage of water contained behind Wykamol Cavity Drain Membranes and subsequent diversion to sump.
Predrilled with 19 mm holes at 70 mm centres for water ingress.
Suitable for use behind DPM to reduce water pressure.
Can be fitted with jetting eyes for periodic flushing.

Aqua Drain:

60 mm diameter drainage pipe for perimeter drainage of basements. Designed for drainage of water contained behind Wykamol Cavity Drain Membranes and subsequent diversion to sump.
Fully perforated for water ingress. Fitted with continuous geotextile sheath to prevent ingress of particles.
Lay below floating floor or screed and DPM. Lay in floorslab channel (w x h), 125 x 75 mm, filled with small grade aggregate.
Suitable for use behind DPM to reduce water pressure.

Approvals: British Board of Agrément: 05/4261: Membrane systems -Certificate: 05/4261, Detail sheets 2/3/4