First established in 2006, Certass is a Government approved Competent Person Scheme (CPS) and is now one of the largest regulatory bodies in the double glazing industry. By investing in a double glazing installer that has been certified by Certass, you can rest assured that you’ll be bringing unrivalled standards of performance and design to your home.

Certass is an organisation which is licensed by the Department for Communities and Local Government. This means that all members are fully vetted and approved to ensure they are in accordance with current Building Regulations. With this in place, all Certass members have had to prove their competency when it comes to delivering the highest standards of professionalism, promptness, product handling, and complete respect for your time and for your property.

This means you can have complete peace of mind knowing that every Certass installer has the relevant qualifications and experience. We know that the idea of bringing a new home improvement to your home can sometimes seem like a bit of a daunting process, which is why you’ll want to be looking out for signposts that assure you you’re making the right decision. Certass is one of the signs that you’ll want to look out for.

All Certass double glazing installers must be fully trained and meet strict specifications set by local authorities so you can expect a high standard of workmanship from any Certass registered installer. This means that all Certass members have had to prove their salt when it comes to delivering the highest standards of service and product quality. You’ll be able to enjoy the peace of mind that comes with knowing you’ve made the right decision.

What is a Competent Person Scheme?

Competent Person Schemes were created by the Government as an alternative to submitting a building notice or contacting an approved Local Authority inspector for certain building works. They have been initiated with the homeowner in mind, allowing you to bring the best to your home without having to worry about undertaking an elongated and stressful installation process. With this in mind, you’ll be able to enhance your home to modern standards sooner and easier across the board.

Certass currently oversees three separate certification schemes for installers within the building refurbishment industry which all operate under Government license or Government sub-licence. The licensing schemes cover Glazing and insulation with other trades being covered under their Green Deal and TrustMark licenses.Certass Scheme

Members Are Checked Against The Following Criteria:

  • Trading Record and Financial Status
  • Estimates Are Provided in Plain Language
  • Contractors Abide By The ‘7 Day Cooling Off’ Legislation
  • Guarantee Wording is Fair
  • Consumers Are Offered An Insurance Backed Guarantee
  • A Complaints Handling Procedure Is In Place
  • Sample Installations Are Inspected Annually
  • All Window Installations Meet Current Thermal Rating Regulations

As you see, this is a comprehensive certification that assesses any potential on their ability the expected standard across a wide range of areas. If your installer of choice has a Certass accreditation, then you’ll know that they have been put through their paces when it comes to ensuring they offer you an outstanding level of product quality and customer service. There is no reason to settle for less when you don’t have to.

The Benefits of Choosing Certass MembersCertass Companies

If you have your double glazing installed by a Certass registered installer you will receive the following benefits:Benefits of Certass Installers

  • Deposit Protection
  • A 10 Year Guarantee Covering Installation
  • An Insurance Policy Covering The 10 Year Guarantee
  • Registration of Your New Double Glazing With The Relevant Local Authority

Not only does this ensure that you’ll be investing complete peace of mind when it comes to your new home improvement solution, it also means that you’ll be able to bring lasting quality too. This is because your product of choice is going to be covered by a comprehensive 10 year guarantee. Also, the standard of product is going to be of the highest standard so you won’t have to worry about any warping, cracking, discolouring, twisting, or bowing out of shape when the window or door becomes wet or is exposed to the elements for a long period of time.

Certass Certificate
A Certass installer will provide you with a Building Regulation Compliance Certificate for any work carried out.  This is a huge benefit of using a Certass accredited installer. They will register and take care of your window and door registration for you. This includes registering your new double glazing with the relevant local authority – at no extra cost to you. They can help save you valuable time and money. All in all, choosing a Certass accredited installer will enable you to enjoy a standard of service that is going to be simple, effective, professional, and a worthwhile investment across the board.

Proof of Accreditation

Certass is independently checked annually by UKAS (United Kingdom Accreditation Service.) A lot of companies will claim to be Certass registered but a lot aren’t. Always ask for their Certass certificate number to verify their claims or visit the Certass website to confirm for yourself.

There are lots of other trade bodies available such as FENSA, the Glass and Glazing Federation, the British Plastic Association and the Ombudsman Scheme. If a double glazing company isn’t registered with Certass then they may belong to another national network which provides additional protection.

Fortunately for you, many members of our installer network have been tested and certified by Certass. All you will have to do is visit our double glazing cost calculator to get a guide price that has been based on you exact specifications, once you have this we can then put you in touch with the three of your local and accredited installers to help get things moving along for you.

What to Expect from a Certass Installer

When it comes down to bringing the benefits of a Certass installer to your property, there are a few things that you should expect from them:

Thermally Efficient Products

Bringing a new addition to your home is one of those things that should see you enjoying a higher standard of comfort. This is why it’s important that the product you are investing in has the ability to keep your home warmer and more comfortable during those winter months. Also, investing in a thermally efficient design could also see you saving money on your heating costs too as you rely less frequently on it to keep your home at the optimum temperature.

Market-Leading Design

When it comes to bringing something new to your home, you’re going to want something that is going to last the test of time. This is why a Certass member will be able to offer you a new addition to your home that is going to achieve exceptional standards of thermal efficiency, security, durability, performance, design, and aesthetics. This will make them a worthwhile investment for your home.

Professional Installation

Alongside product quality, you also want an installation that is going to help your product of choice perform as it should. With this in mind, a Certass certified installer will work to ensure you experience as little disruption to your daily life as possible. With this in mind, they’ll also ensure that your product is installed to the highest standard so you won’t have to worry about it quickly degrading in quality once it has been installed.

Reputable Double Glazing Companies

Double Glazing on The Web has a wide network of fully accredited double glazing companies who are registered with regulatory bodies such as Certass. You can expect a quality and professional service from each one of our trusted companies.

Why not start your free double glazing quote today? Our double glazing cost calculator is easy to use and will provide you with instant double glazing prices. Alternatively, you can give us a call on: 0800 015 5679.

Frequently Asked Double Glazing Questions

Frequently Asked Double Glazing Questions

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.

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.

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.

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.

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.

Double Glazing Cost Calculator