Kite Marks

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The Ultimate Collection products are manufactured by John Fredericks Plasticks Ltd.

The British Standards Kitemark is one of the most well known and respected product certification marks in the world and is your reassurance that BSI has checked that your John Fredericks Plastics Ltd UPVC double glazing and composite doors from South Lakes Windows Ltd comply with the latest British Standards.

BSI Registered

FM 33147

Quality Assurance ISO 9001:2000
This certification was awarded for providing a high level of Quality Control systems throughout
manufacture, administration, health & safety, and products including that of our suppliers such as
profile and hardware. We are required to give BSI unreetrictad access to our offices and factories
and allow random samples to be selected for testing on a regular basis.

Quality Assurance Kitemark


BS7412. PVC-U Windows

A primary standard for upvc windows whereby a series of mechanical and manual tests are carried out to ensure windows against weather performance, durability and an accepted level of burglar resistance.

Quality Assurance Kitemark


BS7950. PVC-U Windows – Enhanced Security

An enhanced security test whereby all elements and fittings were tested against forced entry and leverage to ensure ultimate window security.

pas 23 24

pas 23/24

PAS23/24. PVC-U Doors (Compliant)

A primary and enhanced performance requirement for single PVC-u entrance doors. All elements of product were tested against weather tightness, operation, strength and cycle and all individual security features and assemblies.

Quality Assurance Kitemark


BS EN1279 PT2. Sealed Units

A thorough and daily test routine for double glazed sealed units is carried out to ensure The Ultimate Collection maintain certification. Tests prove our sealed units adhere to correct dew point, sealant correctness, desiccant moisture absorbency and solar properties of the specified glass.


cert. no 04/4080

The British Board of Agrement

A Government partnered organisation to provide authorative information on the performance of building products. To gain accreditation, John Fredericks Plastics Ltd products were assessed in 3 separate areas: laboratory testing, site inspections and factory production control. Rigorous testing included air permeability, water tightness, effect of wind loads, thermal efficiency, durability of fittings, resistance to impact, racking and bending and ease of operation.

With so many accreditations you can feel safe and secure in your home and comfortable with your investment in The Ultimate Collection energy rated PVC-u windows and doors from South Lakes Windows Ltd.


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Call FREEPHONE 0800 917 6066 and speak to one of our super helpful staff RIGHT NOW! (Office Hours)
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Double Glazing in the Lake District, Cumbria

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