Choosing between French doors and sliding patio doors is one of those decisions that seems simple at first – until you actually start weighing up the details. Both open up your home to the garden or patio, both let in plenty of light, and both can look great. But they work very differently, suit different homes, and come with their own trade-offs.
If you’re replacing a back door in a Dublin home or fitting doors as part of a renovation or new build, this guide will walk you through everything you need to know before making a call.
What Are French Doors?
French doors are a pair of hinged doors that open outward or inward from the centre. They’ve been a fixture in Irish homes for decades – and for good reason. They suit both period-style homes in areas like Rathgar or Drumcondra and more modern builds across Swords and Blanchardstown.
At ThermoGlaze, French doors in Dublin are available in the ThermoGlaze 70 sculptured frame and the ThermoGlaze 63 chamfered frame. You can choose inward or outward opening, and select between aluminium or PVC thresholds. Glazing options include 28mm double-glazed or 36mm triple-glazed thermally toughened safety glass – which makes a real difference to your home’s heat retention during Irish winters.
Key Features of ThermoGlaze French Doors
-
- High security standard with multi-point hook-and-shoot bolt locking systems
-
- Anti-snap cylinders as standard
-
- Internal beading for added security
-
- Double and triple glazing options
-
- Thermally efficient glazing to reduce heat loss
-
- 90-degree stop opening position
-
- Georgian bar style effect available
-
- Wide range of colour options – smooth and grain finishes
-
- Various hardware options to suit your style
What Are Sliding Patio Doors?
Sliding patio doors work on a track system – one panel is fixed while the other slides horizontally in front of it. They’re popular in homes where floor space near the door is at a premium, since they don’t swing open into the room or onto the patio.
ThermoGlaze supplies Dako patio doors, which are designed to bring light and a clear sightline into your living space without the bulk of a swinging door. They’re a solid pick for open-plan layouts where the kitchen or living room leads directly onto a garden or decking area.
Key Features of ThermoGlaze Sliding Patio Doors
-
- Space-saving sliding mechanism – no clearance needed for opening
-
- Customisable colours and finishes to match your home
-
- Choice of hardware, handles, and hinges
-
- Tailored sizing to fit non-standard openings
-
- Energy-efficient glazing options
-
- Professional installation with post-installation support
-
- Expert consultation included as part of the service
French Doors vs Sliding Patio Doors: A Side-by-Side Comparison
| Feature | French Doors | Sliding Patio Doors |
| Opening Mechanism | Hinged, opens inward or outward | Slides horizontally on a track |
| Space Required | Clearance needed for door swing | No clearance needed – slides flat |
| Natural Light | Excellent – full double-door width | Excellent – large glass panels |
| Ventilation | Full opening when both doors open | Limited to width of one sliding panel |
| Security | Multi-point locking, anti-snap cylinder | Track locks, multi-point systems |
| Glazing Options | 28mm double or 36mm triple glazed | Energy-efficient glazing available |
| Best For | Period homes, smaller patios, style focus | Modern homes, open-plan layouts, tight spaces |
| Customisation | Frames, colours, hardware, Georgian bars | Colours, finishes, hardware, sizing |
| Energy Efficiency | High – thermally toughened safety glass | High – designed to retain heat |
Which Door Is Better for Your Home?
The honest answer: it depends on your home, your garden access, and what matters most to you. Here’s how to think through it.
Go With French Doors If…
-
- Your home has a traditional or period character. French doors suit Victorian, Edwardian, and semi-detached homes across Dublin’s older suburbs. The classic double-door look sits naturally in these properties.
-
- You want maximum ventilation. When both leaves open fully, you get a wide, unobstructed opening – ideal on warm days or for moving furniture.
-
- You have enough outdoor clearance. If the door opens outward, you need space on the patio. If it opens inward, you need indoor clearance. Either way, it’s manageable with planning.
-
- You want more design options. Georgian bar effects, grain or smooth finishes, and more varied hardware choices give you more scope to match the door to the rest of your home.
Go With Sliding Patio Doors If…
-
- Your layout is open-plan. In a kitchen-diner that flows straight to the garden, a sliding door keeps things clean and uncluttered.
-
- You’re tight on space indoors or outdoors. No swing arc means more usable floor area right up to the door threshold.
-
- You want a wide, unframed view. Sliding patio doors often have a slimmer frame-to-glass ratio, which gives a more open view of the garden.
-
- You’re working with a large opening. Sliding doors can span wider openings more easily than hinged French doors.
Not sure which suits your home? Call 01 912 0600 and speak to our team at ThermoGlaze – we’ll help you choose based on your property and your needs.
Energy Efficiency: Does It Matter Which You Choose?
In short – yes, but both options can perform well if you pick the right glazing.
ThermoGlaze French doors are available with 36mm triple-glazed thermally toughened safety glass, which is one of the better-performing options for Irish homes where keeping heat in during winter is a priority. The ThermoGlaze 70 frame profile is built with thermal efficiency in mind.
Patio doors from ThermoGlaze are also designed with energy performance at the forefront. If you’re upgrading from older single-glazed or standard double-glazed doors, either option will make a noticeable difference to your home’s warmth and energy bills.
It’s also worth checking whether your door upgrade may qualify for support under the SEAI windows and doors grant scheme – which can help offset the cost of energy-efficient home improvements.
Security: Which Door Is Safer?
Both door types can be made secure – the difference is in the locking mechanisms and how well they’re specified.
ThermoGlaze French doors come with multi-point hook-and-shoot bolt locking systems and anti-snap cylinders as standard. Internal beading is also included, which prevents the glass from being pushed out from the outside.
Sliding patio doors use track-based locking systems with multi-point locks on the sliding panel. When properly specified and installed, they’re fully secure. The key is ensuring the track mechanism and locks are of good quality – which is why buying from a reputable supplier and installer matters.
Visit Our Showrooms in Dublin
The best way to make this decision is to see both door types in person. ThermoGlaze has two showrooms in Dublin where you can view our full range and speak to our team directly.
Northside Showroom (Swords):
Unit F2, Swords Enterprise Park, Feltrim Road, Drinan, Swords, Co. Dublin, K67 WF72
Southside Showroom (Rathgar):
68 Rathgar Avenue, Dublin 6, D06 KN53
Call us on 01 912 0600 to arrange a visit, or drop in during opening hours. Our team will take you through the options without any pressure – just straightforward advice based on your home and your budget.
You can also get a free online quote and we will get back to you quickly.
Conclusion
French doors and sliding patio doors are both excellent choices for connecting your home to the outdoors – but they suit different situations. French doors are the better pick if you want character, full ventilation, and a traditional look that fits older Dublin homes. Sliding patio doors make more sense for modern layouts, tight spaces, and wide openings where you want a clean, unframed view of the garden.
The good news: ThermoGlaze supplies and installs both to a high standard across Dublin. Whether you choose French doors or patio doors, you’ll get professional installation, energy-efficient glazing, and proper security as standard.
Ready to move forward? Visit thermoglaze.ie or call 01 912 0600 to speak to the team. You can also visit either of our Dublin showrooms – Swords or Rathgar – and see the range for yourself before you decide.
FAQs
1. What is the main difference between French doors and sliding patio doors?
French doors are hinged and open inward or outward from the centre, while sliding patio doors move horizontally along a track. French doors give a wider ventilation opening; patio doors save floor space because they don’t swing.
2. Which door is better for a small patio or garden area?
Sliding patio doors are generally better for smaller outdoor areas because they don’t need clearance space to open. French doors that open outward need room on the patio, which can be tight if the outdoor space is limited.
3. Are French doors more secure than patio doors?
Both can be equally secure when properly specified. ThermoGlaze French doors come with multi-point locking and anti-snap cylinders as standard. Sliding patio doors use track-based multi-point locking. The key is choosing a well-built door from a reputable supplier.
4. Which door type is more energy efficient?
Both can perform well. ThermoGlaze French doors are available with 36mm triple-glazed thermally toughened safety glass, which is a high-performance option. Patio doors are also available with energy-efficient glazing. Triple glazing will generally outperform standard double glazing regardless of door type.
5. Can I get French doors or patio doors to match my home’s style?
Yes. Both door types are available in a wide range of colours, finishes, and hardware options. French doors also offer Georgian bar effects, which suit period-style homes. Patio doors have a more contemporary look but can be finished to complement most homes.
6. Do French doors or patio doors add more value to a home?
Both can add value, particularly if they replace an old or poor-performing door. French doors tend to appeal strongly to buyers of period or traditional properties; patio doors work well in modern homes and open-plan extensions.
7. How much space do French doors need to open?
That depends on whether they open inward or outward. Outward-opening French doors need clear patio space equal to the door width. Inward-opening French doors need the same clearance inside the room. ThermoGlaze offers both configurations.
8. Can sliding patio doors be made to a non-standard size?
Yes. ThermoGlaze patio doors can be customised to fit non-standard opening dimensions, which is useful for extensions or older properties where openings don’t follow standard measurements.
9. Is it worth visiting a showroom before choosing?
It really is. Seeing both door types in person gives you a much clearer sense of how they look, how they operate, and how the frames and glazing compare. ThermoGlaze has showrooms in Swords and Rathgar – the team will walk you through the options without any pressure.
10. How do I get a quote for French doors or patio doors in Dublin?
You can call ThermoGlaze on 01 912 0600, visit either Dublin showrooms, or submit a request online. The team will come back to you with a clear, no-obligation quote.