The benefits of triple-glazed windows and doors - Grand Designs Magazine

Triple-glazed windows and doors for an energy-efficient home

Unparalleled insulation and security are just some of the benefits of triple glazing

Promotional Feature By Alice Butler |

Designing a cosy, low-energy home? It’s worth putting triple-glazed windows at the top of your checklist. Offering unparalleled insulation and security as well as a quieter environment, many homeowners are bypassing double for triple glazing. Here’s why…

Open-plan kitchen-diner with panoramic sliding triple-glazed windows leading onto the terrace

Photo: Internorm

Triple glazing is perfect for low-energy homes

Whether you’re designing a dream eco-build or retrofitting your existing property, triple glazing is a great way to ensure a snug and energy-efficient home.

With an extra pane of glass than double glazing, triple-glazed windows offer another layer of insulation to prevent vital heat from escaping your home. This means your property will be more fuel-efficient, helping to save energy and cut your bills.

However, before you invest, make sure you choose high-quality triple-glazed windows and doors from a company with a proven track record. Thanks to 90 years of experience, Internorm is the leading window brand in Europe for premium, low-energy and Passivhaus windows and doors.

Interior of modern home with white open-plan minimalist kitchen and dining area and sliding triple-glazed doors

Photo: Internorm

Triple-glazed windows are energy efficient

Internorm’s award-winning triple-glazed products offer superior energy-saving benefits as well as better acoustic and security performance – all made bespoke to your specification. Whichever material you have in mind, the range includes timber-aluminium, uPVC and uPVC-aluminium windows, lift-and-slide and entrance doors.

For top thermal ratings Internorm’s premium uPVC and uPVC-aluminium collection has it covered with U-values below 0.8W/m2K. Plus, peace and quiet are guaranteed with noise reduction of up to 47dB.

Alternatively, if you prefer the look and feel of wood, the popular timber-aluminium range comes in a choice of options, making it ideal for both traditional and contemporary projects. It also has strong environmental credentials and outstanding energy performance.

Exterior of modern property with vertical wood cladding and triple-glazed window and door entrance

Photo: Internorm

Triple-glazed windows are strong and secure

While fuel efficiency is a top consideration for windows and doors, security and strength are also key concerns for homeowners.

When it comes to safety, Internorm’s triple-glazing features additional benefits such as Fix-O-Round technology. This is where the glass is bonded into the sash, providing a continuous connection between glass and frame. Fix-O-Round provides extra stability to protect against burglary. Not only that, the smooth finish boosts thermal insulation and soundproofing while ensuring longevity of the window and door.

Moreover, if you’re project requires large panes of glass, Internorm’s glazing is extra strong thanks to its innovative I-Core construction. This means lift-and-slide doors are available up to a generous 11 metres in width.

Sliding triple-glazed windows and doors in a modern home with white walls and natural wood decor

If you’d like to install triple-glazed windows and doors in your home, take advantage of Internorm’s triple-for-double-glazing offer which runs until 13 December 2021. To find your local approved Internorm partner in the UK or Ireland, visit