Basement Waterproofing

Basement & Cellar Waterproofing

In cities, you will often find a lower ground floor, basement or cellar in most properties. The external ground level is high and the frontal elevation allows damp to seep in.

At Rocksure Damp Proofing, we recommend a number of damp eradication techniques, some of which are:

  • Cementation type membrane
  • Cavity drain membrane

It is recommended for the plaster or the render to be removed so that the original brickwork is visible and it may also be necessary at the same time to consider incorporating within the cementation system (or the cavity drain membrane system) a chemical damp proof course depending on the external ground level or adjoining property levels which will be taken into account..

Cementation systems (such as Vandex BB.75, Triton TT.55,)  require a render coat of washed sand and cement to be applied, clean from dust and debris brickwork or stone masonry with the cement membrane applied to the surface of the new render as per the manufacturers recommendations in a minimum of two coats  with suitable overlap detailing between the vertical membrane of the walls with any proposed horizontal membrane depending on type of the floor.

One of the alternatives to the cementation tanking system is the Cavity drain membrane systems (Tritons IsolaPlaton System). The main working principle of the cementation system is holding the water back. On the other hand, the work of the cavity drain membrane is to allow the penetration of water in the structure whilst making sure it is diverted to the drainage system and also controlling the dampness in the air gap. Prevention of pressure build up against the internal construction is one of the things the system does. The structure has a breathing ability due to the air gap existing behind the membrane, this also keeps it dry. Plastic membranes can be attached to the masonry and sealing tape and rope along with brick plugs can be used for the purpose, with overlap detailing at junctions, which involves minimal preparation required to the surface. Drainage pump installation is one additional requirement while the cavity drain membrane systems are installed and failure warning alarm or backup pump must also be included.

Water Based Epoxy Coating:

  • Two coat system comprising primer and top coat.
  • Epoxy based waterproof coating for walls and floors.
  • Suitable for use as a damp proof finish.
  • Water based formulation is safe and is useful in combination systems such as for flat soffits where cavity drain membranes are inappropriate for use or headroom is an issue.

Damp proof membrane and water vapour suppressant
A solvent free, two part epoxy resin coating typically used as a surface damp proof membrane and a water vapour suppressant. It is well suited in order to be used as a barrier to water beneath raised access floors in plant rooms. It can also be used on damp surfaces such as sand or cement and cemented floors in order to contain the rising moisture. The product can be used for general purpose and coating surfaces, it can be applied with a brush or medium pile roller.

New concrete subfloors, sand & cement screeds should be left for a minimum of eight days before applying this material.

If you any questions about Basement and Cellar waterproofing, contact Rocksure Damp Proofing today to speak to one of our specialists.

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