With Government encouragement, the Fenestration Self-Assessment Scheme (FENSA) was set up by the Glass and Glazing Federation (GGF) and other industry bodies in response to Building Regulations for double glazing companies in the UK.

Any homeowner replacing windows, doors and roof lights in dwellings across England and Wales must comply with all of the current thermal performance and Building Regulation standards. A homeowner also has the responsibility of ensuring that they receive a certificate from a Competent Person Scheme such as FENSA or from a Local Authority Building Control to ensure that the work has been carried out in accordance with up to date regulations.

Why Choose A FENSA Registered Double Glazing Company?

As one of the leading bodies in the double glazing industry, FENSA monitors as well as vets its double glazing member companies across the country. They ensure that all of their members adhere to current Building Regulations, with regular assessments by an ‘independent inspection body’ to certify their continued high standards of window and door installation.

Great Peace of Mind

Because FENSA regularly assess their members, you can enjoy complete peace of mind knowing that any work carried out on your property is fully compliant with current Building Regulations.

FENSA protects consumers from the double glazing ‘cowboys.’ They withhold their scheme from any installer unable to pass their independent assessments and will report any company falsely claiming FENSA registration. You can therefore be completely confident in their network of trusted companies.

Types of Checks

All companies / installers are thoroughly vetted and checked before joining the scheme.

The following details standard checks which are carried out as part of the process before registering any installer:

  • Pre-approval inspection
  • Part of the pre-approval checks include checking the company’s technical surveyor and installer competencies
  • Financial checks
  • Employer’s Liability for at least £10 million
  • Public Liability for at least £2 million
  • Consumer Contract Documents with clear terms and conditions
  • Any guarantees and warranties must be clearly written and expressed prior to contract and subsequent installation

Save Time and Costs

When you choose a FENSA accredited installer you will receive a FENSA certificate upon completion of your double glazing installation. This serves as proof of Building Regulations compliance and means that your property will be certified as adhering to all of the current UK building standards.

FENSA enables their members to self-certify compliance under Building Regulations without the need for a separate assessment from your local authorities Building Control. This means that you do not have to register your window and door installation with the local authority yourself, thereby making the process much easier. Your FENSA installer will take care of the paperwork for you. This approach is quicker, simpler and may even save you hundreds of pounds.

Do you own properties in different local authorities? Not a problem. You can use the same FENSA installer for consistency of quality and price. All FENSA installers are able to work in any Local Authority jurisdiction which makes the process of installations much better once you have found an installer that you trust.

Insurance Backed Guarantees

All installations that fall under FENSA’s remit must come with an insurance backed guarantee. This is extremely important for homeowners to know since any FENSA registered company must give consumers a guarantee or warranty covering the cost of any rectification work. This is in respect of defects for a period of up to 10 years from the initial date of installation.

Deposit Protection

Any FENSA registered double glazing company that takes a deposit in advance of installations, must also give some form of deposit indemnity. Deposits given must be guaranteed by either a trade association Deposit Indemnity scheme or by credit card protection.

FENSA even provides an ‘approved’ list of already vetted insurers that FENSA Registered Businesses must use.

Did You Know?

In an independent report commissioned by the Government found FENSA to be the most successful of all competent person schemes in the UK. Across all industries, FENSA is the brand trusted by consumers, Local Authorities, Industry and Government alike.

Double Glazing on The Web Recommended

If you are considering replacing your windows or doors then it is very important that you choose an accredited double glazing company. At Double Glazing on The Web, we ensure that each of our trusted suppliers are registered with industry regulatory bodies.

If you would like us to put you in touch with an accredited double glazing installer local to you, then please call us on freephone: 0800 015 5679.

Frequently Asked Double Glazing Questions

Frequently Asked Double Glazing Questions

Are Double Glazed Windows Good For The Environment?

Once of the best ways of making your home more energy efficient is insulation. Double glazed windows act as another layer of insulation, helping to prevent the loss of valuable heat.

If I Use Double Glazing on the Web Who Will Fit My Double Glazing?

Double Glazing on the Web have a fully accredited network of local installers. Once you have created your free online quote we will put you in touch with up to three reputable local suppliers. Each of these suppliers will offer you a free no obligation quote and who you choose is completely up to you.

How much is double glazing per window?

Double glazing prices per window can vary from around £150 to £600 depending on the specification. The window style, type of glass, frame colour and handles are all contributing factors. To find out the true double glazing price per window it is a good idea to get a number of quotes to compare.

What is the average cost to double glaze a house?

The average cost to double glaze a house will depend on the size of your house and the number of windows. To double glaze a flat or apartment it will probably cost around £2,000. The average cost to double glaze a house is usually between £4,500 to £7,500. If you collect a number of double glazing quotes you will be able to compare companies and prices.

Is double glazing expensive?

Double glazing can be an affordable addition for many homeowners. The price you pay can depend on the quality of the windows and the energy ratings. Other factors are the style of the windows, the colour of the frames and the type of glass. Why not get an online double glazing quote to get an idea of the price.

Is double glazing easy to break?

Double glazing is a strong option for windows compared to single glazing. The frames are durable and there are high security locking options. As double glazing is made from glass it is possible to break however you will have to exert quite a bit of force to do this. This is practically impossible to do without making a noise.

What Does Double Glazing Do?

Double glazing makes your house more energy efficient, keeping heating in and keeping the cold out during winter months. During summer months, it helps keep the hot air out, keeping your house cooler. It also works to insulate sounds from busy areas and roads, leaving your house more peaceful and quieter.

Does Double Glazing Block Sound?

Double Glazing not only provides heat insulation but it also provides sound insulation too. Double glazing is perfect for houses in busy areas and streets.

How Do I Know If My Double Glazing Needs Repaired?

There are four tell-tale signs that your double glazed windows need repair or replaced: There are chips and cracks in the panes of glass; there is condensation (misted windows) between the two panes of glass; the window allows cold air through; water begins to seep through the frame. If your double glazing does any of these things, you may need to get your double glazing repaired or replaced.

Is uPVC Flammable?

No, uPVC isn’t flammable and is actually a fire retardant.

What Can Cause Double Glazing To Crack?

Double glazing can crack for what appears to be no particular reason at all. A sealed window unit faces constant pressure either side of the glass, however, most of the time double glazing is strong enough to deal with this. Winter can be one of the worst time for cracked glass as the difference of temperature on either side of the glass stressing it to the point it can crack.

Should I Double Glaze My Windows?

Double glazing works to make your house more energy efficient saving you money on your heating bills. Double glazing also provides sound insulation which is perfect if your house is situated near busy roads and noisy areas. Double glazed windows are also tougher and harder to break than single glazing windows making your house more safe and secure.

How Do I Know If My Double Glazing Needs Replaced?

Double glazing will need replaced after a while due to the nature of the design – the gas that separates the two window panes slowly leaks out over time meaning the energy efficiency of your window is compromised. If your double glazing allows cold spots; water to seep through the frame; has cracks or chips in the window or has a build-up of condensation between the two panes of glass (misted windows), you should probably look into getting your double glazing replaced or repaired.

How Long Does Double Glazing Last?

It is important to note that the argon gas that separates the panes of gas, giving double glazing its energy efficiency will eventually leak out overtime. Double glazing has an average life span of about 20 years, however, this can vary depending on materials used and the installation.

Is Double Glazing Worth It?

Double glazing helps make your home more energy efficient as it prevents the loss of heat. During the summer, it helps to keep the heat out of your home. It provides your home with sound insulation which is perfect for houses that are in busy areas and streets. Double glazing also makes your home safer and more secure.

Is Double Glazing Easy to Break?

No, double glazing is not easy to break which means your home will be more secure. When attempting to smash double glazing often what happens is that the first pane of glass and the second will remain intact. This is due to the argon gas working as a shock absorber. This will mean the smash is very loud but unsuccessful on the first attempt.

How much does it cost to install a window?

The prices given in our pricing tables, our online quotes and our costing calculators reflect the price of the window itself as well as the cost of installation. For example, a 500mm x 500mm casement window will cost between £150 and £175 including the cost of installation.

How much does it cost to double glaze a 3 bed house?

On average a double glazed window will cost between £350 and £400, with a uPVC door typically costing £600. This means that double glazing a 3 bedroom semi can cost between £3500 and £5000.

Should I replace my old sash windows?

Sash windows are a key feature for many traditional period buildings. Sash windows were traditionally built using timber, which is fairly high maintenance and has a tendency toward rotting and warping. Over time, these windows can become draughty and insecure. uPVC sash windows are a great way to experience the benefits of modern double glazing, without sacrificing the aesthetic of your home. uPVC sash windows will not rot or warp and require little maintenance. They are also thermally efficient, which means that your home will not require as much heating.

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