Standard Double-Glazed Unit — Clear Float, Budget-FriendlyOur Standard Double-Glazed Unit is a straightforward, no-frills sealed unit built from two panes of 4mm clear float glass with a 16mm air-filled cavity. At a U-value of 2.8 W/m²K, this unit won't meet current Part L requirements for heated living spaces — but that's not what it's designed for.This is the right unit for garages, outbuildings, workshops, sheds, greenhouses, and non-heated spaces where you need double glazing for weather protection and security but don't need energy-rated performance. It's also widely used for secondary glazing installations and internal partitions.When to Choose Standard Clear/ClearIf your project doesn't fall under Building Regulations Part L (non-heated spaces, like-for-like replacements in some circumstances, or agricultural buildings), this unit saves significant cost compared to Low-E argon alternatives. For heated rooms requiring Building Control sign-off, choose our Low-E Argon IGU instead. U-value: 2.8 W/m²K (air filled) or 2.6 W/m²K (argon upgrade available) Configuration: 4mm clear + 16mm air + 4mm clear Light transmittance: ~80% — maximum daylight Overall thickness: 24mm Manufactured to BS EN 1279 at our Bristol facility with the same quality control as our premium range. Nationwide delivery available. 10-year warranty on seal integrity.Use our glass configurator to get an instant price for your exact dimensions.
