Windows, Doors and Conservatories in South Wales
10 years Guarantee
Quality Installation
Superior Products
Windows
Doors
Conservatories
Quality And Trust
Proud To Serve South Wales
Based in Caerphilly we serve the whole of south Wales, from Bridgend to Newport and the Welsh Valleys. Daimant offers quality installation and superior products in a variety of colours, styles and designs. We pride ourselves on a quality finish, using quality products from only select suppliers. ‘Getting it right the first time’ has become our mantra.
Our aim is to provide an exceptional service to our customers, putting them first throughout the whole fitting process. Working for you, we help you create your dream home.
A Range of Doors to Suit Your Home
Residential Doors
Your front door is the first thing people see when they visit you. You want it to be stylish and welcoming, strong and secure.
Composite Doors
Our doors imitate the look of wood with the added benefits of low maintenance, energy efficiency and security.
Patio Doors
These classic doors offer extra light and a feeling of space. A popular choice that come with superior security fittings.
Bi-fold Doors
When closed, bi-fold doors are a wall of glass with views into your garden. When open, the inside and outside become one.
WORK WITH US
Choose Us As Your Trusted Provider
01
Quality
02
Customer Focused
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Local
The Benefits of Choosing Daimant
Security First
All windows and doors come with multi-point locking, PAS 24 compliance, and optional Secured by Design certification, protecting your family and property.
Energy Efficiency
From A+ rated double glazing to LEKA insulated conservatory roofs, our installations are designed to reduce energy bills and improve comfort.
Tailored Design
Choose from colours, finishes, glazing, and hardware that complement your property’s style — whether it’s a Cardiff townhouse, a Caerphilly new-build, or a rural South Wales cottage.
Increased Property Value
Estate agents estimate that upgrading to modern windows, secure composite doors, or adding a conservatory can increase resale value by 5–10%.
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FAQs
Do I need planning permission for new windows or doors in Cardiff?
Most homeowners in Cardiff and South Wales do not need planning permission to replace windows or doors, as long as the replacements are similar in appearance to the originals. However, there are exceptions. If your home is listed or in a conservation area, such as parts of Pontcanna, Roath, or Llandaff, stricter rules apply. In these areas, window replacements often need to match the property’s historic design, which is why vertical sliding sash windows or flush sash timber-effect frames are popular.
For doors, planning permission is usually not required unless you are making structural changes to the opening or altering the façade of a listed property. For conservatories, planning rules vary depending on the size and placement.
At Daimant, we have years of experience dealing with planning and conservation requirements in Cardiff and South Wales. We guide you through the process, recommend heritage-approved finishes, and ensure your installation complies with UK Building Regulations and FENSA standards. This way, you get modern insulation and security without risking non-compliance.
How much value can new windows, doors, or a conservatory add to my home?
Upgrading windows, doors, or adding a conservatory can increase both property value and buyer appeal. Estate agents across South Wales estimate that modern, energy-efficient installations can add 5–10% to a home’s resale value. For example, a new composite front door improves kerb appeal immediately, while A+ rated casement or flush sash windows reduce energy bills — making the property more attractive to buyers.
Conservatories can add even more value when designed as year-round living spaces. A conservatory with a LEKA warm roof system is considered a true extension, offering additional usable space such as a dining room, home office, or garden lounge. This versatility often delivers the strongest return on investment compared with traditional glass or polycarbonate roofs.
Beyond resale value, these upgrades save money on heating, improve security, and reduce noise — benefits that South Wales homeowners increasingly look for. Daimant’s installations are backed by FENSA certification and insurance guarantees, providing long-term peace of mind while boosting market value.
Are composite doors more secure and energy efficient than uPVC doors?
Yes, composite doors generally outperform standard uPVC doors in both security and thermal efficiency. Composite doors are built with a solid timber or insulated foam core, reinforced frames, and a durable GRP (glass reinforced plastic) outer skin. This makes them more resistant to forced entry and impact compared to hollow uPVC frames.
For security, Daimant installs composite doors with multi-point locking systems, anti-snap cylinders, and PAS 24 certification. Many are also Secured by Design approved, a UK police-backed standard for burglary prevention.
In terms of energy efficiency, composite doors achieve lower U-values than most uPVC doors, keeping homes warmer in winter and cooler in summer. The Energy Saving Trust notes that upgrading from an older timber or basic uPVC door to a modern insulated composite can save £100–£150 annually on energy bills.
Composite doors are also highly customisable, available in a range of colours, woodgrain effects, and decorative glazing options. This means homeowners in Caerphilly, Cardiff, and South Wales get both performance and aesthetic appeal, making composites a long-term investment.
What is the LEKA warm roof system and why is it better for conservatories?
The LEKA warm roof system is a modern replacement for outdated glass or polycarbonate conservatory roofs. Unlike older systems that often overheat in summer and lose heat in winter, the LEKA roof uses lightweight insulated panels, GRP rafters, and breathable membranes to achieve U-values as low as 0.15 W/m²K. This makes it one of the most energy-efficient conservatory roofing systems in the UK.
For homeowners in South Wales, this means your conservatory can finally be used as a year-round living space — as warm as any other room in your home. LEKA roofs also support plastered ceilings, LED lighting, and roof windows, giving your conservatory the appearance and comfort of a full extension.
Daimant specialises in fitting LEKA warm roofs and LEKA orangeries across Caerphilly, Cardiff, and South Wales. Every installation is Building Regulations compliant and comes with long-term guarantees. For families tired of seasonal conservatories, a LEKA upgrade is the most effective way to increase usability, energy efficiency, and property value.