Double glazing


So you decided to replace your old windows with PVC double glazing. You started doing market research and then you suddenly hit a million different requirements, options and brands.

So where do you start? The best way is to look at your home and then your budget because most of the extra options that can be added to double glazing can have a drastic effect on the price.

Understanding these options and requirements will allow you to evaluate any quote you have because you will be able to understand exactly what is going on. Essentially, no one will be able to pull the wool over your eyes.

In England and Wales, the replacement of double glazing must comply with a number of building regulations. If you plan to install the windows yourself, you will need to contact the building regulations to obtain the necessary documentation, or you can have the windows installed by a FENSA registered company. The regulations are:

Thermal Insulation:

Replacement windows must meet the minimum standards of thermal insulation. For UPVC frames, the glazing must reach a maximum U value of 2.0W / m2K. When ordering your new windows, make sure that your supplier can prove that the glazings meet these requirements. this before issuing a certificate of completion.

Structural Security

If the replacement windows are wider than those they replace, or involve the replacement of protruding windows, the building inspector will have to make sure that the windows are larger than the ones they replace, or imply the replacement of the protruding windows, the building inspector will have to make sure that the windows are larger. adequate structural support is provided above the window and in the bays the support angle posts are adequate.

Safety glazing

Low level glazing within 800 mm of the floor, door glazing and door edges less than 300 mm from the floor must generally be of the type so that they break safely. This means that the glass must be hardened or laminated.


Building regulations require that adequate ventilation be provided for persons in buildings, so you should not aggravate ventilation arrangements of existing premises. If your original windows have background runoff, then the replacements should have them installed as well. In addition, all living rooms and rooms containing a toilet must have opening lights at least 1 / 20th of the floor area of ​​the room they serve. Kitchens and bathrooms normally require an exhaust fan, so if you remove window fans, these must also be reinstated.

Combustion Air for Heaters and Fires

In some cases, existing windows may contain a permanent vent to supply combustion air heaters. could cause problems to your devices. If this is the case, you must ensure that the replacement window contains a similar permanent vent, or that other means providing the required ventilation are installed at the same time. It is advisable to have your equipment checked by an authorized installer, for example corgi for gas appliances.

Retention of deactivated thresholds

Many newer properties are now equipped with level access sills and your new doors should not worsen this access nor reduce the width of the door opening.

Means of Evacuation

All windows on the first floor of dwellings should ideally have opening lights large enough for you to escape if you were trapped in the room by a fire . This also applies to rooms on the floor where they do not open directly into a room leading to an outside door through which you can escape. To meet this requirement, all these windows should have an open unobstructed area of ​​at least 0.33 m2 and at least 450 mm in height and 450 mm in width (the road through the window can be inclined rather than straight).

So, once you have met the requirements of your windows, then you have to look at the myriad of glass options available, some of the options will be mandatory because of the construction regulations, eg. to meet the thermal insulation etc. Here are some of the available options:

Tempered glass: is a type of glass that has increased strength and usually breaks into small fragments when it is broken.

Laminated glass: is a type of glass that holds together when it is broken. When it is broken, it is held in place by an interlayer, typically made of polyvinyl butyral (PVB). between his two other layers of glass. This spacer keeps the layers of glass glued even when they are broken. This produces a cracking pattern of the spider web when the impact is not enough to pierce the glass.

Low emissivity glass. Transparent coating applied to the glass surface to separate thermal energy (long waves) and light energy (short waves) – long waves are reflected back to the heat source and short waves can cross the coating . The low E glass marks include.

Filled Gas: Argon is a colorless, odorless, non-flammable and non-reactive inert gas. Glass windows filled with argon gas are used to reduce heat loss in sealed units by slowing convection inside the air space between the two glass panels.

Low maintenance glass. Is an ordinary glass with a special photocatalytic coating. It is made by chemically bonding and incorporating a microscopically thin surface layer on the outer surface of the clear glass. The use of this glass in hard to clean areas can be particularly helpful.

I hope this information will give you enough knowledge to decipher any quote that could happen to you. If you need information about a glazing product, stop at Conservatory TV [] they have a multitude of articles and videos and an honest opinion.


Source by Andrew Bean

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