| Composition
and Manufacture
The window profiles are extruded from high impact modified PVC-U blended and extruded under BS.5750 quality control conditions. Swish profiles conform to BS.7413 : 1991 the specification for White PVC-U extruded hollow profiles with heat welded corner joints for plastics windows : material type A (impact modified). In manufacture, all mitred corners are fusion welded using the hot blade method for strength and weather-tightness. Transoms and mullions can either be 'V' notch welded or mechanically jointed. Where necessary profiles are reinforced with 1 or 2mm hot dipped galvanised steel sections to BS.2989 : 1982 ZN, G275N or 1.5 to 3mm extruded sections to BS.1474 from 6063 T6 aluminum alloy. All window furniture is predominantly fixed through either two profile walls, one profile wall and the reinforcement, or one profile wall and two locating flanges. |
Drainage
All Swish windows
and doors are fully drained to permit the escape of any water ingress.
Drainage slots are typically |
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Mechanics Profiles are tested and conform to BS.7413 : 1992 the specification for white PVC-U extruded hollow profiles with heat welded corner joints for plastics windows : material type A (impact modified). |
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Heat Insulation Typical heat instruction (U value) for double glazed units using two by 4mm thick sheets of glass is 2.8 w/m k. The U value for single glazing is normally assumed to be 5.7 w/m k. |
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| Weather
Resistance
Samples of Swish tilt and turn and outward opening windows have been tested according to BS.6375 Part 1, 1983 and have exceeded the "severe" exposure grade. Testing in accordance with BS.5368. Part 1: 1976
Air Permeability Test: 600 Pascals |
Sound
Insulation
Typical sound insulation for double glazed units using two by 4mm thick sheets of glass is approximately 30 dB. If thicker glass or triple glazing is used the sound insulation will be improved. |
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| Colour
Stability
Swish windows can be expected to show no perceptible change in colour, viewed at one metre, after 20 years of outdoor exposure. |
Gaskets
All gaskets
are predom inantly E.P.D.M |
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| Wall
Thickness
The external walls of all Swish profiles are a nominal 3mm thick for maximum rigidity. Internal walls are 1, 1.5 or2mm thick. |
Installation
Correct fixing and glazing is vital to the satisfactory function for all PVC-U windows and doors. Installation should be in accordance with the B.P.F/G.G.F. code of practice for the installation of white high impact modified PVC-U Windows. |
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| Glazing
Normally internally glazed for maximum security and ease of glazing and subsequent replacement. External glazing may be specified if required. Full range of glass widths can be accommodated. See the chart. Click Here. All glazing should conform to BS.6262 : 1982. |
Maintenance
Swish windows and doors require minimal maintenance. The PVC-U frames may be cleaned using a mild soap and water solution (avoid all abrasive cleaners), fittings should be periodically lubricated. |
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Information