You may have a number of questions that need to be answered before you settle on a final decision. Read through our most commonly asked questions below.
What’s the difference between flush and non-flush casement windows?

A casement is the moving part of a window that opens and closes. Standard windows (also known as ‘lipped’) include casements that sit above the window frame.

Flush windows are becoming more and more widespread as the casements sit entirely flat with the frame, creating a neater, more compact look. Come down to one of our Design Centres to view the difference side by side.

Oak Envisage Flush Windows
What is the difference between Double Glazed or Triple Glazed Windows?

Offering fantastic insulation and security, double glazed windows are now considered an essential part of all modern homes. Double glazing windows consist of two panes of glass separated by an insulating gas.

Easily fitted to any style of window, triple glazed windows look very similar to traditional double glazing; the one simple difference being there are three panes of glass instead of two. The biggest advantage of both double and triple glazing is of course the amazing energy efficiency they provide. We urge you to speak to a Joedan advisor to find the best option for your home.

Windows Guarantee


Our approachable advisors are always willing to respond to any queries you may have. The details of some of our common questions are below.

Which are better aluminium or UPVC windows?

Most experts agree that aluminium is the better material with which to make windows from. Aluminium is inherently strong and requires no extra reinforcing of its frames. Because of their strength, aluminium frames can be made slimmer in profile compared to upvc windows. This makes them look neater and allows more light into your home due to the increased glass area.

UPVC windows have a high coefficient of thermal expansion which makes them prone to twisting and warping, especially when exposed to a lot of sun. This means they can start to let in drafts and even rainwater after only 10 – 15 years. Aluminium on the other hand is not nearly as sensitive to higher temperatures and UV radiation.  Aluminium windows can easily last up to 40 years and beyond.

UPVC windows can be recycled at the end of their useful life. However, it is a difficult and expensive procedure due to the presence of polymers and reinforcing material. Alternatively, aluminium frames can be recycled repeatedly with virtually no deterioration in quality.

Do you do timber windows?

We do not sell or install timber windows.

What colours can I choose from?

There are too many colours available to list! However, our aluminium systems come in a range of popular ‘house’ colours which are all priced the same and are always held in stock. In addition, you can choose from a vast range of special RAL colours which are available as a bespoke option. We also offer dual colours which allow you to have a different colour on the inside to the outside.

Our UPVC windows come in a range of colour foils, in addition to the standard White.

Do you make your own windows?

We make all of our Lusso range of aluminium windows in our manufacturing facility in Gloucestershire. In fact, we are an aluminium systems company and design most of our products ourselves and have done since the 1990’s. Our products are designed, painted and manufactured in the UK.

Do you do supply only windows?

No we do not offer a ‘supply only’ service. All of our windows are comprehensively guaranteed for 10 years. Therefore, we insist on fitting your windows using our own fitters who have been trained in-house and are extremely competent at fitting our various systems. We do not employ sub contracted fitters, which allows us to maintain our high standard of installation.

What is FENSA and is Joedan a member?

Yes, Joedan is a member of FENSA (Registered No. 11017). FENSA stands for the Fenestration Self-Assessment Scheme. Following Government encouragement, FENSA has been set up by the Glass and Glazing Federation (GGF) and other industry bodies in response to Building Regulations for double glazing companies in England and Wales.

When replacing windows and doors, homeowners must comply with current thermal performance standards and ensure they get a certificate from FENSA or Local Authority Building Control.

FENSA enables companies that install replacement windows and doors to self-certify compliance under these Building Regulations without the need for a separate assessment from Building Control.

Are you members of the Glass & Glazing Federation (GGF)?

You should always use a GGF member for your new windows and doors. Joedan is a long running GGF member. The GGF is the only government approved regulatory body in the UK window and door industry. By using a GGF member for your windows and doors, you are protecting yourself against unwittingly using a sub-standard company for your work. GGF members have to prove high levels of financial security, and have their terms and conditions audited regularly to make sure they are fair and in the customer’s best interests. The GGF also offer a mediation service between member and customer should there ever be a need for it.

What does Secured by Design mean?

Secured by Design (SBD) is the official police security initiative that works to improve the security of buildings and their immediate surroundings to provide safe places to live.

SBD’s product-based accreditation scheme – the Police Preferred Specification – provides a recognised standard for all security products that can deter and reduce crime.  This includes domestic windows and doors, and the components within them such as locks, hinges etc.

Joedan is a registered member of Secured by Design and many of our products have been tested to meet the demands of the standard.

What does U-Value mean?

A U-Value, in simple terms, indicates how well your window will be at retaining the internal heat within your home and preventing it from escaping to the outside.  U-Values are measure in Watts per square metre, or W/m2 K. The lower the U-Value number, the better the heat retention of the window. All new or replacement windows require a minimum U Value of 1.6 W/m2 K.  Ask your Joedan consultant for further details and they’ll be only too happy to help.

What will it cost for me to replace my windows and doors?

We will need to spend some time discussing your needs before giving you a cost because all our windows and doors are tailor-made for your home and take into consideration your openings and fittings.

Joedan has muliple style, colour and performance possibilities for you to pick from, so it makes sense to discuss this and measure up before giving you a price.

The first step is requesting a free design consultation which can be arranged to take place at your home or an online appointment which takes place on Zoom.
Add your details to our ‘Appointment Booking Form‘.and someone within our friendly team will get back to you.

How long will an initial appointment with a Joedan designer last?

Usually 1 hour. This will be ample time for our designer to grasp your needs, collect measurements and present exciting window and door possibilities for your home.

How long does it take for you to install my new windows and doors?

Every job is different so we will need a few more details first. A full house of windows usually takes around 3-4 days to install. It will depend on how many windows and doors we are installing and how complicated it is. Don’t hesitate to speak to a Joedan advisor for a more specific estimate of timings.


With over 40 years of experience, we’re proud to be one of the countries longest running independent window and door manufacturers. The Joedan Group puts its emphasis not only on superior quality, but on offering affordable luxury and the best possible customer service.

A Family Run Business

At Joedan, we are a family run business with multiple design centres across the Midlands and Southern England, giving all our customers the chance to 'try before you buy'.

Exclusive Products

As a leading manufacturer, Joedan offers an exclusive collection of windows & doors. We design and manufacture our own products at our purpose built facility in Tewkesbury, Gloucestershire.

Relaxed Sales Process

At Joedan, we operate a zero-pressure sales experience. We understand customers prefer an experience, where advisors listen to their requirements and try to offer the best solutions in a friendly and relaxed way.

10 Year Guarantee

Joedan offers a comprehensive 10 Year Guarantee. Not only that, you will also be covered for both moving and non-moving parts. Our confidence in our products and dedication to our customers means we’ll be there for you well into the future.


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