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Over the past 3 years double glazing technology has moved forwards at an impressive rate of development. We are not able to offer double glazing units that have a u-value of 0.6! When compared to 3 years ago the standard double glazing unit had a u-value of 1.8. The u-value of a glazing unit measured the amount of thermal transmittance through the glass unit, therefore the higher the uvalue the more thermal energy (heat) is being lost through your double glazing.
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It is now widely regarded that the cylinder lock is potentially the weakest point of a door and is very easy to break into; this is why we recommend installing anti-snap cylinder locks which protect against the following:
The maximum and minimum sizes for uPVC sash windows are as follows:
As the existing wooden sash windows will be thicker than upvc casement windows the angles will definitely be different and must therefore be carefully surveyed by an experienced surveyor. Many companies will advise you to retain the existing wooden bay canopy and wooden bay posts as this is easier to install than a full replacement. This is not advised as there is no way of knowing the internal condition of the wooden bay posts; as the posts are load bearing we recommend replacing these with uPVC clad aluminium bay posts with additional bay jack reinforcement.
White uPVC Windows and Doors: £3000
Many properties in Sheffield are fitted with sash bay windows; careful consideration must be taken when replacing a large wooden bay window for upvc casement windows or sash windows.