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Coating
Normally leathergrain embossed Plastisol 200 microns thick
with an epoxy primer on the reverse.
The condensation regulating fabric
Composition: Unwoven polyester cellulose.
Colour: White
Thickness: 80 grammes per square meter covered
Corrosion Resistance
After 1000 hours in a salt spray, the adherence of the fabric
to the steel sheet is identical to that before the test.
Four barriers separate the humid area from the steel:
- The zinc
- The chemical treatment
- The primer
- The adhesive
The corrosion resistance is therefore greatly improved.
Coverworld Non Drip Processing
After numerous comparative tests, two components have been
selected:
- A hard wearing tear resistant fabric
- An adhesive with excellent properties to guarantee its stability
for bending, profiling, punching, and shearing processes under
normal conditions.
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Format
Non Drip is supplied to Coverworld in coil form with the overlap
edge uncoated. This is to prevent water being drawn in to the
lap by syphonic action.
Precautions
A varnish has to be site applied to the end of the overlap
to prevent water ingress by syphonic action. Similarly this has
to be applied to the gutter end of the sheet. This varnish is
supplied free of charge.
If stored outdoors, Coverworld non drip sheets should be protected
from the elements.
Profiled sheets should not be allowed to slide on each other
or on steelwork. If timber purlins are being used, the two surfaces
should be separated by a suitable masking tape.
Coverworld UK has supplied Non Drip on a number of large prestigious
Cold Store projects throughout the United Kingdom. Some recent
examples are:
32,000 square metres of Coverworld 34R roof profile on a cold
store in Bridgewater Somerset.
6,000 square meters of Coverworld 34R roof profile for Langdon
Properties at Bridgewater Somerset.
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