New Floor Slabs
It is possible to construct floor slabs from waterproof concrete complying with BS 8007. However to achieve this grade, a considerable amount of extra steel reinforcing is required, greatly increasing the cost of the slab.
An alternative approach is to use standard concrete of the required strength in conjunction with a coating or membrane to protect the slab from water ingress. Safeguard offer two options for waterproofing new floor slabs. Other options are available for the waterproofing of existing floor slabs.
Drybase Crystalline Active Slurry powder is sprinkled onto the wet concrete slab after the initial set. It is then power-trowelled into the surface, imparting waterproof properties to the slab. A summary of the dry sprinkle method of application is given below:
Oldroyd Xs is a tough polypropylene membrane embossed with an ‘X’ pattern of grooves. To provide a waterproof barrier, the Oldroyd Xs membrane is simply rolled out under the position of the proposed floor slab before the steels are put in place. The joints are then double-sealed using Oldroyd Double Sided Tape and Oldroyd Overseal Tape. The slab is then poured in the usual way. When installed in conjunction with other appropriate measures such as radon sumps, this option also offers protection against ground gases and soil contaminants.
Oldroyd Xs is manufactured from much thicker plastic than standard damp-proofing membranes so is much more resistant to damage on site – e.g. damage caused by rebars laid on top.
For full application details, please contact our technical department on 01403 210204 or submit an enquiry.
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