Triple Glazed Timber Sash Windows

Triple glazed sash windows for every project

Discover the exceptional blend of classic elegance and advanced performance in our triple glazed sash windows. Designed for professional environments, these windows combine the timeless appeal of traditional design with the latest in insulation technology.

Our windows are meticulously crafted to enhance any professional setting. The triple-layered glass optimises thermal efficiency and noise reduction, making them ideal for various applications where both aesthetics and functionality are paramount.

Enquire

Our tiple glazed sash window specifications

Downloads

Triple Glazed Sash Window

PDF

Product guidance - as standard

Frame (Box Sash)

100 x 192 mm (lining width x frame depth), manufactured using mortise and tenon joints, glued and mechanically fixed

Frame (Spring Balance)

55 x 192 mm (lining width x frame depth), manufactured using mortise and tenon joints, glued and mechanically fixed.

Sash

39 x 71 mm top rail and stiles, 90 x 71 mm bottom rail, 45 x 71 mm meeting rail

Mullion/transom

39 x 71 mm top rail and stiles, 90 x 71 mm bottom rail, 45 x 71 mm meeting rail

Sill projection

35 mm, 50mm, 60mm, 70mm

Staff / parting beads

Timber

Wood moisture content

12-19%

Our tiple glazed sash window specifications

Material

Frame+Sash Engineered redwood, Bottom Cill in Solid Hardwood - Standard. Engineered hardwood, Accoya, European oak.

Colour

White - RAL 9016 - Standard. Any RAL - from RAL classic range. Stain - from TRC stain range

Finish

Three coat spray applied factory finish using water based micro-porous paint/ stain

Glazing bars

Applied 18 & 22mm glazing bars to external faces of double glazed unit

Glazing

Triple glazed, 4/14/4/14/4 Low-E top sash – 4tgh/14/4/14/4tgh bottom sash - Standard, Ug-value: 0.6 W/m²K; g-value: 0.52-0.55

Perimeter spacing bars

White warm edge perimeter spacer with white warm edge integral spacers - Standard. Silver and Black spacer optional

Trickle ventilation

Concealed through frame head trickle ventilator. EA 1700, 4400, 5000 mm²

Child restrictor

Angel lock standard. Traditional Sash Stop optional

Downloads

Triple Glazed Sash Window

PDF

Smithfield Market

Security and efficiency
with triple glazing

Our triple glazed sash windows expertly blend the timeless charm of classic sash windows with the modern benefits of triple glazing, providing superior insulation. The enduring traditional weight and pulley system, combined with our sleek, slim-profile triple glazing, maintains the window’s refined aesthetic while enhancing its functionality.

At TRC Windows, we prioritize both security and efficiency. Our triple glazed windows are equipped with strong locks and safety restrictors, ensuring peace of mind. The addition of advanced draught-proofing further boosts comfort and leads to significant energy savings.

Royal Artillery Barracks

Aesthetics and functionality:
our triple glazed window features

Dedicated to delivering tailor-made solutions, TRC Windows excels in creating custom triple glazed sash windows. We work intimately with our clients, offering personalized designs that meet the specific architectural and functional requirements of their professional settings.

Constructed from premium, environmentally-friendly timber, our triple glazed windows are designed to harmoniously blend with your property’s architecture. We offer a variety of glazing options to maximize thermal efficiency and reduce noise penetration.

Our triple glazed sash windows don’t just look stunning; they’re also built for performance. They feature effective draught-proofing and solid security locks, ensuring both aesthetic elegance and practical functionality. Installed with precision by our skilled professionals, these windows are guaranteed to be a perfect fit and of enduring quality.

Whether you’re restoring a historic property or adding a touch of traditional elegance to a modern home, TRC Windows has the expertise and experience to customize the perfect heritage triple glazed sash windows for your project. Reach out to us to discuss your specific requirements and arrange a consultation with our friendly experts.

Both the works and resident liason were an excellent standard and the works were successfully completed to programme and budgets.

COLIN DAVIES ARCUS CONSULTING LLP

TRC and their subcontractors SLG have been a pleasure to work with and the final result of the finished works look absolutely fantastic

Hayley Jones Great Places Housing Group

I want to express my thanks, on record, to the whole project team for your efforts on this scheme. The project ran smoothly throughout.

Nick Smith John Burke Associates

We had a very positive experience and have been very happy with the service and end results, from survey stage through to repair stage everything was done to a very good standard.

Gary Mcgregor Equans

I consider that TRC Contracts have done a good job with the window refurbishment and have returned this building to a handsome property fitting of its listed status.

Debby Osman MCIAT, MFPWS ghd partnership Ltd

The service and attention to detail was extremely good, operatives on site are always on time, diligent in their work, tidy and considerate which was of particular importance while working in an occupied house.

Alastair Gibson Kebbell

They adapted well to the restrictions and Government guidance and worked really well with our customers to access their properties and complete the work efficiently and safely.

John Dwyer Richmond Housing Partnership

There was a client walk around yesterday and they mentioned TRC ‘s safety standards were fantastic well done and keep it up!

Nahid Wates

Next quote

Thanks for getting in touch.
We'll get back to you shortly.

Need an urgent response?

Get in touch

Get in touch

Get in touch

New Windows

Window Restoration

About

NBS & Technical

Services

Triple Glazed Timber Sash Windows

Triple glazed sash windows for every project

Our tiple glazed sash window specifications

Smithfield Market

Smithfield Market

Security and efficiency
with triple glazing

Royal Artillery Barracks

Royal Artillery Barracks

Aesthetics and functionality:
our triple glazed window features

Both the works and resident liason were an excellent standard and the works were successfully completed to programme and budgets.

TRC and their subcontractors SLG have been a pleasure to work with and the final result of the finished works look absolutely fantastic

I want to express my thanks, on record, to the whole project team for your efforts on this scheme. The project ran smoothly throughout.

We had a very positive experience and have been very happy with the service and end results, from survey stage through to repair stage everything was done to a very good standard.

I consider that TRC Contracts have done a good job with the window refurbishment and have returned this building to a handsome property fitting of its listed status.

The service and attention to detail was extremely good, operatives on site are always on time, diligent in their work, tidy and considerate which was of particular importance while working in an occupied house.

They adapted well to the restrictions and Government guidance and worked really well with our customers to access their properties and complete the work efficiently and safely.

There was a client walk around yesterday and they mentioned TRC ‘s safety standards were fantastic well done and keep it up!

Get in touch

Get in touch

Get in touch

Thanks for getting in touch.
We'll get back to you shortly.

Fill in form to download

Get in touch

Get in touch

Get in touch

New Windows

Window Restoration

About

NBS & Technical

Services

Triple Glazed Timber Sash Windows

Triple glazed sash windows for every project

Our tiple glazed sash window specifications

Smithfield Market

Smithfield Market

Security and efficiency with triple glazing

Royal Artillery Barracks

Royal Artillery Barracks

Aesthetics and functionality: our triple glazed window features

Both the works and resident liason were an excellent standard and the works were successfully completed to programme and budgets.

TRC and their subcontractors SLG have been a pleasure to work with and the final result of the finished works look absolutely fantastic

I want to express my thanks, on record, to the whole project team for your efforts on this scheme. The project ran smoothly throughout.

We had a very positive experience and have been very happy with the service and end results, from survey stage through to repair stage everything was done to a very good standard.

I consider that TRC Contracts have done a good job with the window refurbishment and have returned this building to a handsome property fitting of its listed status.

The service and attention to detail was extremely good, operatives on site are always on time, diligent in their work, tidy and considerate which was of particular importance while working in an occupied house.

They adapted well to the restrictions and Government guidance and worked really well with our customers to access their properties and complete the work efficiently and safely.

There was a client walk around yesterday and they mentioned TRC ‘s safety standards were fantastic well done and keep it up!

Get in touch

Get in touch

Get in touch

Thanks for getting in touch. We'll get back to you shortly.

Fill in form to download

Security and efficiency
with triple glazing

Aesthetics and functionality:
our triple glazed window features

Thanks for getting in touch.
We'll get back to you shortly.