Koster VAPlite system for basements, with Koster NB1 Grey
Internal waterproofing, vapour control, high strength screed system, permanently prevents passage of liquid water and controls vapour transmission through concrete slabs, all within a 10 mm build-up.
For application to unsealed interior concrete floor slabs such as basement rooms, retail space, private homes and offices and other construction which are exposed to moisture from the underside due to faulty or missing damp proof membrane (DPM).
For application in fast-track construction where there is vapour barrier (DPM) installed under the floor slab, but application of the floor build-up is required before the concrete has completely dried out and the RH readings for the floor are above those advised for the floor finish.
During drying of concrete high alkalinity can become concentrated towards the top surface of the concrete, causing damage to some resin floors and adhesives. The VAPlite System is resistant to alkalinity (pH 13–14) and serves as a barrier protecting the floor build-up from the effects of high alkalinity.
In situations where a vapour open flooring is to be used, but the DPM is missing, damaged or status unknown, the VAPLite system, will create an effective vapour barrier, preventing elevated humidity levels within the room (a particular issue for basement rooms).
VAPLite is intended for basements, lightly trafficked areas (foot traffic only) and smaller areas where shotblasting is not practical. All components of the system must be used as directed including the Koster SL Premium screed. For larger areas, areas subject to vehicular traffic, and areas requiring direct application of the finished floor (without levelling screed) the Koster VAP 2000 I System (covered by a separate NBS) is recommended by the manufacturer and shot blasting (or Koster approved equivalent) will be required.
The Koster VAPlite system has been developed as a complete floor protection system for use in both basement areas subjected to hydrostatic pressure, and ground level or suspended floor slabs subject to short term or long term elevated relative humidity (RH) values. The Koster VAPlite system can provide a BBA approved negative side waterproofing, a quantifiable vapour barrier and a high strength self-levelling screed, all within a 10 mm build-up.
Controlling the water vapour within the floor slab will:
The VAPlite System includes the following steps:
For floor slabs subject to hydrostatic pressure: Polysil TG500 primer (impregnation) followed by 2 coats of Koster NB1 Grey, BBA approved negative side, crystallising, sealing slurry. For ground level or suspended floor slabs: Koster KB Pox IN, ultra-low viscosity epoxy impregnation to fill open pores within the concrete.
All slabs: After 7 days, apply a single coat of Koster VAP I 2000.
All slabs: After 24 hours apply one coat of VAP 06 Primer (for non-absorbent surfaces).
All slabs: Koster SL Premium, high strength, self-levelling screed is applied between 8 mm and 15 mm to provide a level, hard wearing surface to receive any flooring finish and protect the waterproofing and vapour control layers below.
Features and benefits:
Please contact the Koster Technical Team for more information on the system or assistance with specification - technical @kosteruk.com.
Mineral cementitious slurry.
100% solids epoxy resin.
C42/345 Protective coatings for concrete
M10/130 Proprietary quick drying levelling screeds
M40/460 Smoothing underlayment
M50/460 Smoothing/ levelling underlayment compound
M10/7 Proprietary quick drying levelling screeds
Damp proof coatings
Cementitious slurry, epoxy based resin, polymer modified cementitious screed.
Repair and restoration
Koster Polysil TG500.
Primer for below ground applications prior to application of sealing slurry.
Water tightness – Negative side
Koster NB1 Grey.
All slabs that could be subjected to hydrostatic pressure from ground water.
Koster VAP I 2000.
Koster VAP 06 Primer.
Koster SL Premium.
Floor finish supplied by others.
Koster CT 215 Universal Floor - High-build water-based Epoxy.
Koster CT 215 Universal Floor - Self-levelling 2 mm thick.
Koster CT 215 Universal Floor - with highly decorative colour chips finish.
Koster CT 215 Universal Floor - with R11 non-slip finish.
Full cure within 28 days of screeding, can be overcoated after 48 hours.
Technical characteristics, other
Koster VAPlite system including Koster NB1 Grey for below ground application against hydrostatic pressure.
Resistant to 130 m head of negative side water pressure.
Contains Red List materials
Country of material origin
Country of product manufacture
Koster Moisture Control Systems for Concrete Floors
Koster Floor Coatings
Koster NB1 Grey Environmental Product Declaration
Koster Solvent Free Self Leveling Flooring
Koster System Advice Sheet - Koster VAPLite System
Koster Waterproofing Systems Company Brochure
Koster Waterproofing Systems: The Green Pages of Waterproofing and Construction Chemicals