Kennys Liquid Screeding » Applications
Kennys Liquidscreed is suitable for most situations where a conventional unbonded, floating or heated Portland cement screed could be used.
Although bonded systems have been used it is recommended that the system be treated as de-bonded and ducts, service etc. are sealed against fluid loss in the flowing system.
Because of its high flexural strength and lack of voids, floating screeds may generally be laid down to a thickness of 35mm, less than the normal value in industrial use for conventional cement sand screeds of 75mm.
As the system is laid on a debonding membrane of plastic or paper, no cleaning or surface preparation as e.g. scrabbling, bush hammering need to be carried out on the substrate.
The thickness of application should be as show in Table 2 below:
|Type of Construction||Minimum Application Thickness (mm)|
|Above heating Pipes||30|
|Output Height||up to 30 storey's|
|Output Distance||Approximately 180 m3|
Only personnel trained in the application of flowing screed shall be used
The materials should be pump placed onto a prepared membrane, with a 3mm compressible plastic strips on all perimeter edges.
The membrane may be plastic with taped joints or paper, either heat sealed or taped. Care must be taken to seal all ducts, voids and similar.
Laser or similar levels shall be pre-marked or pre-placed and the material filled to the datum and then progressively placed to level across the room. No curing membrane is needed.
Any unglazed or missing windows or doors should be temporarily blocked using polythene or similar to avoid excessive drying fro the first 24 hours. After 48 hours dehumidifiers may be used to "force dry" the material.
Under floor heating may be used 7 days after placing the screed, slowly and intermittently to start with.
The material should be floating using approved flowing screed techniques.
EFFECTS OF FROST
It is recommended that suitable precautions be taken against frost during cold weather conditions before the final strength is achieved.
Kennys Liquidscreed in common with other screeds, is not a wearing course and requires covering with a suitable surface finish.
It should not be used in areas where it will be continuously wet, or regularly wetted. This means that it is not recommended for use in communal baths or showers, changing/washing areas of sports centres, abattoirs, external yards or similar.