The finished profile is dependent on the size of the machine and the type and size of the flail selected by the operator. Residues or spillages of other trades such as plaster, paint, cement, oil (and sometimes roofing tar) are frequently present in new constructions and should be removed. Plaster and cement can be chipped up and wire brushed. Paint should be mechanically removed. It must be appreciated that these recommendations are general. Modifications may be required according to the floor system used and the service conditions under which the surface has to adequately perform. If there is any doubt seek further advice from our Technical Service Department before proceeding with the application of our products. The responsibility for the preparation of any substrate must remain with the installer. Because of the wide variety and uses of our materials, the Company is always more than willing to offer help and assistance with individual flooring problems.

Plywood must always be overlaid with STOPGAP 700 Superflex prior to the installation of a resilient floorcovering. Some textile floorcovering can be directly applied to chipboard.

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Prior to coating or topping, concrete or screeds must first be: free of all contamination and laitance; strong enough to support the coating or topping under the conditions for which the floor is designed. Moisture levels must also be below 75% RH , 2.5% total moisture by gravametric, carbide bomb or speed test methods (less than 65% RH for wood floors) before proceeding with the installation. Can be applied direct over underfloor heating screeds using a coverage of 1.8m²/kg where readings are up to 90% RH

STOPGAP FILL AND PRIME is a two component, flexible cement primer that is flexible with thixotropic properties to allow the filling of joints. STOPGAP FILL AND PRIME should be applied using a steel trowel and spread evenly on to the prepared substrate providing a smooth, uniform surface. The consistency has been designed so that joints in raised access panels are filled. However for application over wide joints it is advisable to mix a unit with reduced liquid content and fill the joints prior to a subsequent coating of STOPGAP FILL AND PRIME mixed to standard consistency. Then apply STOPGAP 700 Superflex or STOPGAP 1200 PRO. This Subfloor Preparation Guide describes the different types of procedures available to produce the most acceptable substrate possible, ready for the installation of one or more of our products.

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Power floated concrete slabs, especially those treated with curing agents, will take a considerable amount of time to dry, waterproof surface membranes such as STOPGA P F76, F77 or F78 should be used providing the surface has been shot blasted.

Any old adhesive residues should be removed by mechanical methods such as scraping, shot blasting and grinding etc. Certain underlayments such as STOPGAP 1200 PRO areMost floorcoverings such as flexible vinyl, linoleum, rubber and textile floorcoverings must be removed and the substrate thoroughly prepared before fully bonded floorcoverings can be laid. Whilst there is a risk involved, some thermoplastic tiles can be overlaid with STOPGAP 1200 PRO or certain floorcoverings providing the tiles are firmly bonded to the subfloor and all traces of polish or any other contaminant which would prevent good adhesion are removed e.g. with STYCCOCLEAN C140 Floor Cleaner. If this cannot be achieved then the tiles must be removed, and the substrate suitably prepared. With some carpet tiles it is, however, possible to install direct to existing resilient and smooth floorcoverings with STYCCOBOND F41 adhesive providing there are no surface treatments that will prevent adhesion. F. Ball and Co. Ltd. – the UK’s leading manufacturer of flooring adhesives and floor preparation products for the contract flooring industry. that are not water soluble. However, for all other smoothing compounds at least 75% of the floor area should be exposed, The sheets should be fixed using screws in a line 12mm in from the sheet edge at 100mm centres and at 150mm intervals at intermediate centres across the sheets and all joints should be staggered.