House extension with a glass roof
Many home owners require extensive glazing to their house extensions and building an extension with an
element of glazing is not uncommon. There are many ways to build a house extension with a glass roof and much will
depend upon how the roof has been formed (flat or pitched).
Few house extensions have a fully glazed roof as this would be impractical and may not
comply with Building Regulations. Most house extensions have a section of the roof dedicated to glass such as
between 20 and 60%. This allows for enhanced thermal improvement of the remaining normal roof to cater for the less
thermally efficient glass.
A flat roof extension may have a central roof light well for a flush glazed contemporary roof light while other
designs may incorporate a more traditional framed glazed lantern roof light or orangry design. A pitched roof house
extension could incorporate preformed velux roof lights for easy installation of glazing within the roof. Other
pitched roofs of house extensions may have patent glazing systems for the top third of the ridge line for
House extensions incorporating glass roofs can be visually attractive as well as providing high levels of light
within the internal living space. However, high levels of glazing within the roof can lead to overheating in the
summer, bleaching of furniture and excessive cooling in the winter requiring high levels of energy use to
Glass technology has evolved now to overcome or reduce many of the se problems but never fully cure but it does
come at an increased cost. Always think about the best location for roof glazing within your house extension. A
room facing south may not be the best position for roof glazing if it does not receive some shading from trees for
Placing the roof glazing towards the central core of an extended property can be a good location for the house
extension roof glazing as many extensions can make the existing living spaces seem darker as the new windows are
placed further down the room.