Sash Windows in Ireland: Styles, Materials & Design Options

August 25, 2026

Replacing the windows in an older Irish home can feel like a difficult compromise. You may want better insulation, improved security and fewer draughts, but you may also worry about losing the character that makes the property special. Sash windows can help you achieve both, combining traditional proportions and styling with updated glazing, draught-proofing and performance features. 

If you are considering sash windows for your home, understanding the different styles, materials and design options can help you choose with greater confidence.

Which Sash Window Style Suits Your Home?

A sliding sash window can be a natural choice for Georgian, Regency and Victorian properties, where traditional proportions and detailing are important. Design details such as the number of glass panes, glazing bar styles, fixed sidelights and arched sashes can help you achieve the right look.

For historic or listed properties, these details can be particularly important when replacing existing windows. Sean Doyle’s hardwood sash windows are designed for sensitive replacement projects and can also be used in traditionally designed new buildings.

The right design depends on the character of your property, the existing window style and the finish you want to achieve.

Explore our guide to window styles for modern and traditional homes 

Hardwood or uPVC Sash Windows: Which Is Right for You?

One of the most important decisions when choosing sash windows is the material. At Sean Doyle Windows, the sash range includes both uPVC sliding sash and hardwood sash windows, giving you different options to suit your property’s style, performance features and personal preferences.

Hardwood Sash Windows

If preserving the traditional character of your property is important, hardwood sash windows offer an authentic period appearance alongside modern performance features.

Sean Doyle’s hardwood sash windows are handcrafted in its specialist timber workshop using high-quality timber from sustainable sources. They are available with double or triple glazing and have an A rating for energy efficiency.

Traditional craftsmanship is combined with modern glazing and draught-proofing technology to create a window designed for thermal performance and comfort. The range is particularly suited to sensitive replacement projects in historic and listed properties, as well as traditionally designed new buildings.

Depending on the requirements of your property, the hardwood sash window can also be installed as a full-frame replacement or into existing box frames.

Key features of Sean Doyle hardwood sash windows:

• Handcrafted in a specialist timber workshop 
• High-quality timber from sustainable sources
• A-rated for energy efficiency
• Available with double or triple glazing
• Modern glazing and draught-proofing technology
• Full-frame or existing box-frame installation options
• Meets PAS 24 standards
• Can open through cords & weights or springs. 

uPVC Sliding Sash Windows

If you want the traditional appearance of a sash window with the practical benefits of uPVC, a sliding sash design offers another option.

Sean Doyle uses high-impact, lead-free German-manufactured uPVC with reinforced steel frames and high-density insulating foam. The windows are available with double and triple-glazed sealed units and feature a multi-point locking system, four airtight seals and high-quality glass.

These features provide excellent thermal properties and superior weathering performance while maintaining the traditional appearance of a sliding sash window. The range is also suited to low-energy and passive homes.

Sean Doyle’s uPVC sliding sash windows meet PAS 24 standards, providing security-backed performance.

Key features:

• High-impact, lead-free German-manufactured uPVC
• Reinforced steel frames
• High-density insulating foam
• Double or triple-glazed sealed units
• Multi-point locking system
• Four airtight seals
• High-quality glass
• Meets PAS 24 standards
• Superior weathering performance
• Opening options – upvc sash windows can tilt forward for ease of cleaning. 

Are Sash Windows Energy Efficient?

Choosing a sash window does not mean you have to accept poor thermal performance. Modern sash windows can combine traditional styling with glazing and construction technologies designed to improve comfort and reduce unwanted draughts.

Sean Doyle’s hardwood sash windows are available with double or triple glazing, modern draught-proofing technology and an A rating for energy efficiency. The uPVC sliding sash range combines double or triple glazing with reinforced frames, high-density insulating foam and four airtight seals.

When comparing options, look at the complete window specification rather than glazing alone. The frame, glass, seals and installation all contribute to how the finished window performs.

Considering triple glazing? See our guide to triple-glazed windows. 

What Should You Consider When Choosing Sash Windows?

When choosing sash windows, consider how the material, glazing, security and installation method suit your property.

• Material: Hardwood and uPVC offer different approaches to the traditional sash style.
• Glazing: Both Sean Doyle sash ranges are available with double or triple glazing.
• Energy efficiency: The hardwood range has an A rating, while the uPVC range offers excellent thermal properties.
• Security: Both ranges meet PAS 24 standards.
• Installation: Hardwood sash windows can be installed as a full-frame replacement or into existing box frames.
• Property type: Historic and listed properties may require a more sensitive replacement approach.

What Sash Window Design Options Can You Choose?

The material is only one part of the decision. Several design details can influence the final appearance of a sash window.

When choosing your sash windows, consider:

• Number of glass panes: Different pane arrangements can create different traditional looks.
• Glazing bars: The style of the glazing bars can influence the character of the window.
• Fixed sidelights: These can be incorporated into certain sash window designs.
• Arched sashes: An option for properties where the architecture calls for this feature.
• Glazing: Both hardwood and uPVC sash windows are available with double or triple glazing.

Are Sash Windows Secure?

Modern sash windows can incorporate security features that differ from older traditional designs.

Sean Doyle’s hardwood and uPVC sliding sash windows meet PAS 24 standards. The uPVC range also includes a multi-point locking system and four airtight seals.

When comparing sash windows, it is worth checking the locking system and independently tested security performance alongside the design and glazing specification.

Replacing Sash Windows in an Older Property

Replacing windows in an older property often involves more than simply choosing a new frame. You may want to preserve existing architectural details while improving insulation, comfort and security.

Sean Doyle’s hardwood sash windows can be used for like-for-like replacement projects and installed either as a full-frame replacement or into existing box frames, depending on the requirements of the property.

This flexibility is particularly useful for sensitive replacement projects in historic and listed properties, as well as traditionally designed buildings where preserving the character of the property is an important consideration.

Before replacing your windows, see our guide to what to consider when replacing windows. 

Conclusion

Choosing sash windows is about finding the right balance between traditional character and the performance you expect from your home. Whether you prefer the authentic appeal of handcrafted hardwood or the modern performance features of uPVC, the right choice will depend on your property’s character, glazing requirements and priorities for comfort, energy efficiency and security.

With more than 45 years of experience, Sean Doyle Windows designs, manufactures and installs its own windows in Ireland. If you’re considering sash windows for your home, you can explore the Sean Doyle range or visit the Dublin or Roscommon showroom to discuss your requirements with the team.

Frequently Asked Questions About Sash Windows

1. Are sash windows suitable for older Irish homes?

Yes. Their traditional proportions make sash windows particularly suitable for many period and character properties. The right design can help maintain the appearance of an older home while modern glazing and draught-proofing can improve everyday comfort.

2. Are sash windows energy efficient?

Modern sash windows can offer improved thermal performance compared with older single-glazed or poorly sealed windows. The overall performance depends on factors including the frame, glazing, seals and installation.

3. Are hardwood or uPVC sash windows better?

Hardwood can be a strong choice if you value natural materials, traditional craftsmanship and period character. uPVC can be attractive if you prefer a low-maintenance material with modern performance features.

4. Can sash windows have double or triple glazing?

Yes. Modern sash windows can be available with both double and triple glazing, depending on the product and specification. The appropriate option will depend on your property and performance requirements.

5. Can sash windows be fitted into existing box frames?

Yes. Sean Doyle’s hardwood sash windows can be installed into existing box frames or as a full-frame replacement, depending on the requirements of the project.