Windows
Back to frequently asked questionsWindows
How do local environmental factors influence the selection of a window system?
It is important to consider the local environment, as this will drive window specification requirements in terms of air, wind and water resistance, as well as security, acoustics and surface treatments.
Typically, we recommend specifying a window system that meets a minimum of 600pa water tightness during weather testing, ideal for use in both commercial and residential settings.
Remember, some properties are subject to a harsher environment, such as exposed or coastal locations, near railway lines or built-up areas. These factors will affect your specification needs.
The coating and finish is also important; anodisation and/or marine-grade paint will prolong the lifetime of the window.
For city-based projects, choosing a window system with optimum acoustic performance will help to minimise noise and disturbances. In addition, ventilation is needed to improve the circulation of fresh air.
For further information, consider joining Reynaers dedicated course for fabricators or installers – GQA in Reynaers Window Systems, or for architects, see our CPD – Aluminium Windows for Optimal Natural Ventilation.
What U-Values can be achieved with Reynaers systems?
You can find the achievable U-Values for each of our window, door and facade systems within each product page on our website (within the 'Technical information' section). This information is also available in our product brochures, which are downloadable on this website.
Please note, U-values and properties depend on size, profile combinations, hardware and infill choices.
Can aluminium windows be used in a Heritage style property?
Yes, aluminium windows are suitable for a wide range of architectural design styles, including a country or classic look. Thanks to the wide choice of profile types, colours and finishes, you will always find a solution to suit your project.
If you are interested in our heritage range, check out our dedicated product offering here.
Which opening types are available for windows?
Reynaers Aluminium offers a wide range of opening types for your windows, each one with its own advantages:
Fixed window: you cannot open this type of window.
Pivot window: opens inwards or outwards via hinges on the side.
Tilt window: tilts inwards at the top.
Tilt-and-turn window: combines a tilt window and a tilt window.
Top-hung window: hinges at the top and tilts outwards.
Drop window: hinges at the bottom and tilts inwards.
Tilting window: rotates around a horizontal axis.
Double casement window: consists of two sashes that swing fully open.
Sliding window: sashes slide over rails.
Parallel outward opening window: slides outwards and remains parallel.
Folding window: several sashes fold open like a harmonica.
Contact your UK representative for further information about which window opening types are available in the UK and for which system.
Browse our full window range here.
What sizes and configurations are available for our window / door systems?
Reynaers window systems are suitable for a range of applications, offering solutions for some of the largest openings possible – from a typical kitchen window to a floor-to-ceiling panoramic glazed opening.
Reynaers’ aluminium window and door systems are available in a range of variants, styles, and configurations. For details on the configuration of a specific window or door system, navigate to the relevant product page, then view the Technical Details section.
For more details and to discuss your individual project requirements, contact our technical team.
In the UK, should my windows open in or open out?
Whilst Reynaers supplies windows that open in and/or open out, in the UK most windows are designed to open outwards.
This is especially true for casement windows, which are the most common type in British homes—they’re hinged at the side and push outward. The outward opening helps with weather resistance, as wind pressure tends to press the window tighter against the seal.
That said, there are exceptions:
- Sash windows (common in period and heritage properties) slide vertically rather than opening in or out
- Some tilt-and-turn windows (often in newer or European-style homes) can open inward
So while outward-opening windows are the standard in the UK, the exact style depends on the window type and property design.
What is the difference between MasterLine 8 and SlimLine 38 systems?
The difference between MasterLine 8 and SlimLine 38 is mainly in design and insulation.
With SlimLine 38, you choose an ultra-slim profile that creates an elegant, almost steel look – ideal for those looking for a minimalist look. This system achieves strong insulation values that perfectly meet current standards.
MasterLine 8 combines a sleek, slim design with even more extensive insulation options. Thanks to the different variants, this system offers extra flexibility to tailor the performance exactly to the wishes of your project.
In both cases, you have the certainty of an aesthetic and high-performance solution, each with their own strengths.
What needs to be considered when choosing the opening type for your property and UK projects?
Firstly, consider the internal or external obstructions of the building. In the UK, we typically have internal blinds or curtains so would use an open-out solution.
Next, consider how you would like the window to open and operate. Choices typically include top or side hung casements (opening outwards), or tilt-turn (opening inwards).
Once you have decided which opening type best suits your project, you will need to consider safety and security requirements in line with UK building regulations.
What building regulations do I need to consider when specifying and installing windows, doors, and curtain walling?
It’s important to discuss your project's specific requirements with your chosen fabricator or installer to ensure the most appropriate window, door, or curtain walling solution is specified.
As a minimum, your project should comply with the relevant Building Regulations for England, including:
- Approved Document Q: Sets out requirements for the security performance of doors and windows in new dwellings to help prevent unauthorised access.
- Approved Document L: Conservation of Fuel and Power: Covers thermal performance and energy efficiency, including U-values and airtightness requirements.
- Approved Document M: Ensures buildings are accessible and inclusive, with requirements for features such as thresholds, door widths, and ease of operation.
- Approved Document F: Specifies minimum ventilation requirements to help maintain good indoor air quality and reduce the risk of condensation and mould.
- Approved Document K: Covers safety glazing, guarding, and other measures to reduce the risk of injury.
Depending on the type, location, and intended use of your building, other Building Regulations may also apply. Your fabricator, installer, architect, or building control body can advise on the specific requirements for your project.
Alternatively, discuss your project requirements with a member of our team.
What U-Values can be achieved with Reynaers systems?
You can find the achievable U-Values for each of our window, door and facade systems within each product page on our website (within the 'Technical information' section). This information is also available in our product brochures, which are downloadable on this website.
Please note, U-values and properties depend on size, profile combinations, hardware and infill choices.
How do I take advantage of Reynaers’ 10-year system guarantee?
To ensure your Reynaers Aluminium system is covered by our 10-year system guarantee, a number of requirements must be met during fabrication, installation and throughout the life of the product. This includes (but is not exclusive to) the following:
- When choosing a fabricator or installer, ensure they have the appropriate, up-to-date training and qualifications in place, such as GQA accreditation.
- During fabrication and installation, the correct approved sealants and adhesives must be used. Refer to our product manuals for further information.
- Once installation is complete, you will receive a Reynaers guarantee pack, along with a copy of our Care and Maintenance brochure. Be sure to check your fabricator has the relevant maintenance documentation, as your system must be maintained in line with the guidance provided in these documents. If you have any questions regarding maintenance or require post-installation support, your fabricator should be your first point of contact.
For details, click here to refer to our guarantee.
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