Hard-coat Low 'E' glass versus Soft-coat Low 'E' Glass
Hard Coat Low 'E'
A glass product that is coated during the molten glass stage of the manufacturing process. A pyrolytic coating is applied and offers a surface that is generally as durable as an ordinary glass surface. Hard coat Low 'E' does not require special handling requirements during manufacture.
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Hard coat Low 'E' glass is relatively durable and can be handled as normal during manufacture.
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Can be toughened for safety purposes.
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Can be used when single glazing applications are required.
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The 'U' Value is higher compared with Soft Coat Glass.
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Haze levels are slightly higher and can be visible at certain viewing angles.
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Higher solar heat gain coefficient compared to soft coat Low-E products.
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Soft Coat Low 'E'
A metallic 'sputter' coating is applied to the glass as a secondary process, usually to offer high low-emissivity or solar control benefits. Soft-coat Low 'E' glasses generally requires some additional care in handling during manufacture and must be used within an insulating glass unit.
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High visible light transmission.
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Soft-coat Low 'E' sealed units can provide the lowest 'U' values available.
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Up to 70% less UV transmission compared with standard clear glazing.
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Optical clarity - minimal colour haze.
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Available in annealed, toughened and laminated glasses.
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Alternative Rooms offer soft-coat Low 'E' sealed double glazed units as standard. Neutral Plus 1.1 soft-coat sealed units give a 'U' value of 1.1w/m2k when gas filled, one of best energy efficient ratings for double glazed units
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Sensitive to handling at manufacturing stages. Special care must be taken when handling.
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Must be used within a sealed double glazed unit.
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Hard-coat Low 'E' glass versus Soft-coat Low 'E' Glass
Quote: “When you do not know what you are doing and what you are doing is the best -- that is inspiration.”
Author: Robert Bresson
