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Heat loss is quantified as a u-value and is measured in kW loss per m2 of window area per year, the lower the u-value the more efficient your windows will be. Here is a brief history of u-values over the decades an how u-values have improved:

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How does a window minimise air leakage?

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Starting from 2013-2014 composite doors will be required in new build properties to meet energy efficiency regulations in the UK. This new change comes due to the unbeatable energy efficiency of composite door slabs when compared to uPVC door panels. Our GRP composites achieve a u-value of only 1.1; this is compared to a uPVC door panel which achieves around 1.6.

The maximum and minimum sizes for uPVC sash windows are as follows:

The center of a composite door is mostly high density foam material that is both highly energy efficient due to the thickness and also impact resistant due to the nature of the foam material. A GRP skin is then laid on the external of the door to add more strength and give the composite door its distinctive appearance.

Alternatively visit us at our uPVC Sash Window page for more information on sash window prices:

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GRP composite doors are also highly secure when compared to standard residential doors. Sheffield and South Yorkshire are known for high crime rates, therefore it is advised to install either a composite door or a high security upvc door. Fully reinforced door case frames and Anti-snap cylinder locks are also advised to minimise the risk of forced entry into your property in Sheffield.

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GRP composite doors are constructed from a fibreglass mould and an HDF core; this means that composite doors are not only better looking than upvc doors but also much more energy efficient when compared with upvc doors. Composite doors will become a requirement for new build properties in Sheffield due to the proposed change in building regulations concerning the installation of entrance doors. At AWM our triple glazed GRP composite doors achieve a u-value of 1.2, this is a market leading efficiency for external entrance doors.

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Composite doors are one of the fastest growing products in home improvements, this is mainly due to the aesthetic improvements that are achieved by installing composite doors rather than upvc doors in Sheffield. The fibreglass mound resembles a true woodgrain effect and composite doors are available in 12 different colour combinations with 4 glass design options.

Sash Window Prices | uPVC Sash Window Prices | uPVC Sliding Sash Windows

Composite Door Energy Efficiency

An A+ rated uPVC window can be achieved in many formats, typically a thermal outer frame and thermally reinforced opening sashes will be used as well as warm edge spacer bars within the glass units. Then a high performance glass will be specified, for double glazed units a double soft coat low-e glass unit configuration will achieve an overall A+ rating.

Unfortunately this leads to the loss of around 4000 jobs from hundreds of stores across the UK.

High quality conservatories manufactured and installed in Doncaster.

Many people would not think to check if their property is in a conservation area; however it only takes one phone call to Sheffield council to find the answer. This is not something to be ignored, as the conservation officers can request that you remove our new windows if they do not meet their requirements. This is usually down to the external colour and style of the window openings.

To quote Napoleon Bonaparte, “He that does not learn from history is doomed to repeat it!”

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At AWM windows and doors of Sheffield we manufacture and install our composite doors to order. We are happy to visit your property in Sheffield or within a 50 mile radius of Sheffield to offer some advice.