FAQ: The abbreviation FENSA stands for FENESTRATION - SELF ASSESSMENT.
The uk dictionary definition of the word fenestral or fenestrate is " belonging to or like a window" The word fenestration is "the arrangement of windows in a building". FENSA is used by double glazing uk trade companies to certify that their replacement windows and doors installed comply with Building Regulations Document L (and more), actually checking av. 1% of all replacement windows installations.
Did You Know?
The difference between a Bow, and a Bay window:
A bow window differs from a bay window in as much as a bow is a 'plant-on' which means that it has been planted on to convert a flat window to a bow. A bay window is one that is built in with the original property, normally with brickwork below of the same shape. We fitted this to what was a rather uninteresting 1960's built house. The window in the adjoining semi is visible in this shot is the original. This demonstrates just how dramatic an improvement new windows can make.
Another plant on bow/bay window with Georgian grille inserted between the double glazed sealed units:
There are two ways of doing a roof on a plant-on bow. The picture above shows a foam filled fibreglass 'all in one' canopy. These are available in only a small number of set sizes which accommodate window widths of between 1800mm, to just under 3000mm. The other type of roof is constructed on site using plywood, sawn softwood to provide a void for insulation and to pad out the height of the roof, and finally lead which is usually finished with an attractive scalloped front. As for the cost, well it is 'six to one-half dozen of the other'. The fibreglass canopy costs a lot more in materials but is quick to fit, whereas the lead type is easier on materials cost but takes a lot longer in labour to make up and finish nicely.