Gaetane. Patio Doors. October 08th , 2017.
A visible "kitemark" on the glass is the consumers assurance that the double-glazed unit has been manufactured to British standards. The BSI has numerous standards, including: U-value verification, Window Energy Rating and Window Installation. The lower the U-value, the better the thermal performance and most local authorities will require this to be 1.8 or better to meet building regulations.
Sight lines is the term used to describe the interruptions in the view through the doors; in other words, the width of the vertical opaque areas between the glass when the doors are closed. On hinged doors, such as French doors and bi folding doors, timber and pvc frames generally have broad sight lines because, unlike aluminium, narrower frames would not be strong enough to be fit for purpose. As a guide to the width of two frames together, cheaper pvc door frames can exceed 200mm, aluminium frames are typically between 135mm and 160mm and frameless patio doors sight lines are under 40mm. Depending on the width of each door and number of doors to be installed, the difference in glass to frame ratio could be significant.
Patio doors comprise an outer frame plus individual door frames. These can be made from wood (soft- and/or hard-wood), metal or alloys (usually aluminium), pvc (polyvinyl chloride, a thermo-plastic polymer - the u stands for unplasticised) or a composite material, which may comprise any of the foregoing materials plus grp (glass reinforced polymer). There is also a style known as frameless, where the vertical sides of each door have no frames.
Installing these doors isnt as simple as it may seem and should therefore only be done by a professional. This is because it is important to get a tight seal, as well as ensure that the weather stripping in the door frame has been placed properly. This particularly applies to the older homes as it can often prove challenging when hanging the doors such that they are plumb, be able to seal out the elements and still be able to open and close the doors easily. Be sure to also select doors that will fit into the space without requiring any modifications. It is therefore advisable to dig deeper into your pocket to find the cash to pay for a professional door installation service that will ensure that your patio doors are perfectly installed the first time around.
Most people are familiar with the sliding glass patio doors. Usually, this is two doors with big, open space windows that allow a lot of light into the home. The doors use a sliding track system that has little round discs sitting inside a mechanism providing traction. Sliding glass doors made out of wood can be plain or very dramatic in design. It really depends on what you envision for your particular home decor.
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