We provide and install VEKA system windows that were designed, using the highest of specifications, in Germany. We provide the following types of windows:
Casement windows
Box sash windows
Flash sash windows
Tilt and turn windows



Your front door is the access point between outdoors and indoors or between two rooms in your home so when selecting the colour, style and design it is important to us that you have a range of ideas from which to choose.
In our range of doors you can find:
Composite doors
Single doors
French doors
Patio doors

Daimant Conservatories

Daimant Conservatories

A conservatory is the perfect choice to provide extra living space whilst seamlessly bringing a touch of nature into your home. The types of roof we can provide for your conservatory are:
Glass roof
LEKA warm roof
Conservatories style:

Daimant Bifold Doors

Daimant Bifold Doors

Bifold doors (sliding and folding doors) are a seamless transition between the indoors and outdoors. Our bifold doors are made of aluminium, making them both elegant and durable. Bifold doors bring a luxurious touch to your home.

Daimant offers quality installation and superior products in a variety of colours, styles and designs. Our aim is to always make our customers happy and provide them with an exceptional service. Working for you our primary goal is to help you achieve the improvement you want for your home.

Customers Reviews

  • Every aspect of the work was carefully done with the least inconvenience. We were especially impressed by Florin's attention to detail, polite manner and friendly approach. The quality window was installed and finishing work completed to a high standard. Very pleased. | Richard Holst
  • Fantastic job would recommend. Extremely honest and great price. | Danielle Etheridge
  • Mr Florin Bruma is a gentleman craftsman. If I could give ten stars I would. He installed an excellent exterior door to our commercial property to the highest standard. You will do yourself a favour to hire Diamant. Reverend Drew Goodman, Christ Church Presbyterian, Barry. | Drew Goodman
  • We had french doors fitted by Daimant recently. Florin was very professional from the initial consultation to the completion of the job. The new doors are great and he left our house neat and tidy. | Natasha Harding
  • Florin from Daimant installed a new door at my house today from sitting room to conservatory. Professional, safe & super knowledgeable and clean. Most important the finish job is a joy to use and look at. Thanks a lot will recommend to all my friends. Went the extra mile for me to adjust a window since it was a couple of minutes job but it's been wrong for months. That topped it up for me :). | Vlad Puha
  • Diamant supplied and fitted a front door and screen, a casement window and a three metre bi-fold door. I was very impressed by their professionalism in dealing with our builders, and the meticulous attention to detail shown from the initial survey to the fitting and finishing. Florin Bruma is clearly very knowledgeable and offered lots of helpful, sound advice. We were supplied with all the necessary certificates and the guaranteed deposit scheme was very reassuring. The products themselves are excellent and keenly priced. I will definitely use this company again. | David George
Daimant Google Review

We start and end our work with high quality and hold
great pride in our work!

Ask to see our ID card

The CE mark is your guarantee of the quality of a product. But how can you check the quality of the fitting? It’s simple, all installers must now demonstrate their Minimum Technical Competences (MTC’s) and as such, need to carry an MTC ID card. Our ID card is government-backed recognition that we meet Minimum Technical Competences. It’s your reassurance that we’ve got knowledge of Building Regulations and British Standards, we undertake regular training and development and we’re audited once every three years to ensure we’re still meeting the required standards.

Request information on our insurance-backed guarantee

Your investment will last for many years to come, so it’s vital in today’s market that you have full confidence in the installation of the products in your home. Everything we install must come with an insurance-backed guarantee so you can be safe in the knowledge that your investment is protected for years to come.

Windows, Doors and Conservatories


Daimant sources its products from manufacturers that have been in business for over 40 years ensuring that the products you choose have a history of being tested and improved to the highest standards. You can be assured that our products will last for years to come creating a warm, homely environment for you and your family. With a large variety of colours and designs we are certain that you will find the perfect product to enhance your home.

Daimant: windows, conservatories, doors, bifold doors and car ports. A service that you will be more than happy with!

Energy matters

Window Energy Ratings explained

Insulating your home is one of the best ways to make your home energy efficient – and one of the key ways to save energy is through double glazing. You will have seen the energy rating stickers on electrical goods such as washing machines and fridges. Window Energy Ratings work in the same way and allow you to see, at a glance, how efficient a window is. Recent legislation means windows must achieve a rating of C or above, so all you need to do is choose how efficient you want to be. Poorly insulated windows alone can lose around 20% of your home’s heat. According to the Energy Saving Trust, replacing all single-glazed windows with B-rated double glazing could save you around £165 on your energy bills as well as reducing your carbon footprint. Of course, you’ll also be able to enjoy a home that is less draughty, has fewer cold spots not to mention adding real value to your property if you later choose to sell. You’ll also notice that you have a quieter home thanks to the improved insulation.

Save money with energy efficient windows, doors, conservatories, bifold doors, that will give your home a great new look

We provide high standard products, installation and customer support.

We have taken the time to choose the best profile available on the market. Our profiles meet and exceed latest industry standards, giving you the peace of mind to know that you are buying quality - BSI approved quality. In addition to that we add a 10 year, no questions asked guarantee.
• Range of energy ratings available from A - C
• The 1st ever A-rated window was made from VEKA profile
• Wide choice of colours and woodgrain finishes available
• Internally glazed for enhanced security
• 70mm profile, direct replacement for timber or 1st generation PVC-U

quality matters

Your home is the biggest purchase you’ll ever make, so it’s important to know you’re making the right choice when it comes to investing in products that add value to it. There are several things you can check to give you the peace of mind you need.
Look out for the CE mark
The latest legislation is designed to give you the reassurance that your new windows, doors and conservatories meet the legal requirements for safety, security, weather tightness, energy efficiency and sound proofing. All windows, doors and conservatories need to be CE marked to comply with current legislation, so if you see products without it, you won’t know if they meet the required standards. All our products are CE marked, so you know they meet the highest quality standards.

Security matters

The safety of your home and your family is vital. That’s why we ensure all our products meet all the relevant standards for safety and security.

High security locking and optional steel reinforcement

All our windows, doors, conservatories and freestanding buildings come with high security locking as standard. The frames can be internally reinforced with galvanised steel, where required, to provide additional strength and an extra safeguard against intruders. Our residential, back and stable doors all have five point locking systems, while our patio, French and bi-folding doors all have multi-point hook locks. You can also opt to add shoot bolts to your windows if you want an additional layer of security.

Choose Secured By Design for extra peace of mind

Secured By Design is a police initiative that recognises products that have been designed with safety and security as the main priority. Administered by The Association of Chief Police Officers (ACPO), Secured By Design status is only awarded to products which offer exceptional security features. Our product ranges offer Secured By Design as an option for total peace of mind.

Our commitment to the environment starts in the factory

For us, awareness of our impact on the environment starts in the factory. We choose VEKA products because of their industry leading quality but also because of the company’s environmental commitment. It takes its responsibilities very seriously and leads the way in minimising the environmental impact of PVC-U at every stage of a product’s life, including manufacture, fabrication, energy efficiency in the home and recycling. VEKA remains the world’s only PVC-U system supplier ever to invest in a purpose-built recycling plant. The plant can recycle an old window into a brand new window, rather than simply recycling into lower grade products such as drain pipes as is the industry standard. Research suggests that home energy use accounts for around 27% of the UK’s CO2 emissions. A simple change, such as fitting energy efficient windows throughout the UK could save an estimated five million tonnes of CO2!

5 W's Find out more:

Daimant sources its products from manufacturers that have been in business for over 40 years ensuring that the products you choose have a history of being tested and improved to the highest standards. You can be assured that our products will last for years to come creating a warm, homely environment for you and your family. With a large variety of colours and designs we are certain that you will find the perfect product to enhance your home.
We are based in Caerphilly
We offer a wide range of products base on fallowing categories:
Windows: Casement, Vertical sliding, Flush sash, Tilt and Turn
Doors: Residential doors, Composite doors, PVCu patio doors, Bi-fold doors.
Conservatories and Roof Systems: Conservatory roofs, LEKA warm system, LEKA orangery, Style.
Modular systems: LEKA Xi.
We offer our service: Monday -Friday 9:00- 4:30
We cover South Wales including: Caerphilly, Cardiff, Newport, Cwmbran, Pontypridd, Pontypool, Merthyr Tydfil, Bridgend, Neath, Swansea and surrounding areas.
We offer quality installation and superior products.
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