The type of double glazing that works best depends on the installation for heat or noise and the type of double glazed window.
There are two main types: sealed units and secondary windows.
A sealed unit replaces the existing glass. It consists of two glass sheets sealed together on the edges with an air gap between them. The thickness of the gap is between 6mm and 12mm, which means that sealed units are not the best choice for sound insulation. The thickness of the windows varies, usually from 3 mm to 10 mm. Ladder units are available with one of the patterned or wired glass panes or with solar control or tempered glass. They can be purchased from glass merchants or from manufacturers.
Because they replace existing glass, sealed units are suitable for all types of windows. They are sold in standard sizes; Non-standard sizes can be made to measure – take the dimensions very precisely.
There are two main forms of sealed units: spaced units where the two glass panels are of the same size and tiered units where the inner pane is smaller than the outer pane. A stepped unit is used when the width of the rebate is insufficient to take the thickness of a spatial unit.
The two great advantages of sealed units are that they do not suffer from condensation between the poles and that they are unobtrusive. Sealed units are used in double glazed replacement windows.
Uses existing window as exterior glazing.
The simplest form of the secondary window is a plastic film, similar to the film used to wrap food, stretched through the window and stuck in position with double-sided tape. This method is not really suited to metal frame windows as the air gap would be too small. The plastic film can be unsightly and can be easily damaged, but it is cheap, easy to install and good for preventing condensation. It should normally be replaced each year.
The most common type of self-made double glazing uses fixed or plastic glass sheets. The method of keeping the window or plastic pane on the window varies: some plastic sheets are attached using magnetic tapes or tactile closures; others have a plastic frame in one part or in two parts mounted around the glass which is then glued, screwed or clipped onto the window frame.
This type is not always suitable for metal windows and is difficult to use on sliding windows without applying to the inside of a chassis and the outside of the windows. other (if the window frame itself) – If mounted on the frame, the fixed windows prevent the window from opening. Removing the windows in summer can be very easy (magnetic tape and touch and closed fasteners) or more tedious (clips and screws).
With sliding panels, a two-channel track is mounted around the cover and the glass or plastic is held in a PVC or aluminum frame. Because the way can be somewhat from the existing window, this type is a good choice for acoustic insulation and is suitable for all types of windows – there are vertical sliding versions for sliding sash windows. Sliding types are quite expensive and can be complicated to assemble but are easy to use.
The other main type is the fixed or articulated panels. With these, the glass is mounted in a rigid aluminum or plastic frame with a gasket that is mounted on the outer wooden frame of the window. On windows that do not open, the panels are fixed with clips or grooves. On the opening panels are hinged on one side with clips on the other (small panels can be installed for the upper opening). If you wish for sound insulation, the panels can be mounted on a sub-frame mounted in the window, away from the existing window. This type of double glazing is quite noticeable but fairly easy to install. It is more expensive than simple fixed sheets, but cheaper than sliding panels and it is the type that most professional installers match.