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Premier’s Thermally Broken LPS1175 SR2 and LPS2081 SRB steel doors achieve market-leading U-Values

Premier Security & Fire Consultants is the UK’s only supplier of Secured by Design Thermally Broken steel doors. In 2018, Premier tested their designs with the BRE (Building Research Establishment) and successfully added LPS1175 SR2 and LPS 2081 SRB thermally broken steel doors to our portfolio of communal entrance steel doors.

Premier’s Vrame Therm system sets new standards in thermal insulation and security. The triple glazing door system can offer the best heat transfer coefficient Ud = 1.1 W/m2K. Thanks to the high-tech insulating bars made from GFK (fibre glass-reinforced plastic), the Vrame Therm door system meets all CE requirements and achieves excellent static values, in numerous tests (air/water/wind/sound/impact/mechanical).

What does thermally broken mean?

What does thermally broken mean?

This all relates to the frame – a vitally important component in any door system.

The frame can greatly affect the actual energy efficiency of any door – including that of double and triple glazed systems.

Standard steel is a good conductor of heat and cold meaning that you can lose or gain a great deal of heat through the frame of the door. This can ultimately undermine the performance of double or triple glazing.

A thermal break needs to be added to the frame. Thermal break technology features a reinforced polyamide bar between the inside and outside steel profiles, creating an insulated barrier within the door frame. This will conduct heat, cold and noise a hundred times slower than standard steel.

Steel Door Sound Insulation

    Steel is the perfect material for creating high-level security doors systems. Unfortunately, it is also an incredibly aggressive conductor of fluctuating temperatures which provides little insulation against the heat of the summer sun or the cold winter weather.

    That is why Premier Security & Fire Consultants are now able to offer Secured by Design LPS1175 SR2 and LPS 2081 SRB steel doors that are thermally broken. Thermally broken is where an additional material is integrated within the profile that conducts virtually no heat between the inside and outside frame – thus ensuring that even on the coldest winter days, the heat stays inside and the cold remains out.

Thermally Broken Steel Doors

    In addition to temperature insulation, the thermal barrier also helps ‘dampen’ vibrations between the frames and therefore improving sound insulation.

    Many communal entrance steel door systems may have insulated and toughened glass, but what about the rest of the performance? Insulated glass is effective indeed, but depending on the climate, partial insulation may not be enough. The solution? Premier’s thermally broken LPS1175 SR2 and LPS 2081 steel doors. Premier offers a fully insulated door system that can be completely thermally broken with insulated frames in addition to the glass.

Premier Security & Fire Consultants’ Secured by Design Thermally Broken doors are available as an entrance door, fire exit door, access control door and high security door. Units can be integrated with a suite of shopfront or curtain walling sections and are ideal as a stand-alone door or as part of a glazed screen. Typically, thermally broken doors are used for:

Shop Doors
Office Doors
Hotel Doors
School Doors
Hospital Doors

To find out more about our incredibly low U-values and thermal efficiency, contact the Premier Security Consultants team today.

Secured by Design Products - Official Police Security Initiative
Loss Prevention Ceritication Board
British Standards Institution
dhf - Raising Standards Safety Assured

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