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An architect’s guide: Types of sash windows from TRC Contracts

An architect’s guide: Types of sash windows from TRC Contracts
An architect’s guide: Types of sash windows from TRC Contracts
Tue Mar 19

When it comes to large-scale projects, choosing the right windows is crucial. Not only do they need to be visually appealing and in line with the building’s design aesthetic, but they also need to provide high levels of security and energy efficiency. That’s where TRC Contracts comes in.

With over 25 years of experience in restoring and manufacturing sash windows, TRC Contracts is the UK’s leading specialist in this field.

We have worked on some of the most prestigious homes, hotels, and historic buildings across the country, and our commitment to unrivalled craftsmanship combined with modern technology sets us apart from other window suppliers.

TRC offers two main sash window ranges for architects to choose from: our Heritage Timber Window Range and our Traditional Timber Window Range.

Heritage Timber Window Range

Our period heritage windows strike a perfect balance between beautiful designs, premium security features, and high energy efficiency. Whether you’re looking for restoration or replacement options, our versatile collection of different types of sash window designs includes heritage sash windows, heritage timber casement windows, and heritage period doors that can cater to your specific needs.

Heritage Sash Windows

These classic timeless sash windows are always popular choices among architects when it comes to replacing or restoring historical buildings. TRC heritage sash windows replicate the authenticity of original timber sash window frames and use a traditional weight-and-pulley mechanism. They are ideal for listed buildings as well as architect-led new developments due to their authentic appearance.

Traditional Timber Window Range

TRC Contracts offers a wide selection of traditional timber windows that will complement any building style. Whether it is a new-build project or refurbishment contract, our meticulously crafted box sash windows and other window style options can easily be fitted to any design requirements you may have. Among our traditional timber window range are the following options:

Box Sash Windows:

The classic design of the traditional box sash window is a popular feature in many historical buildings, dating back to the early 20th century and beyond. At TRC, we hand make each box sash window in our specialist factory to ensure high-quality craftsmanship. These windows stay true to the authentic appearance of Victorian homes and are perfect for both replacement windows in a listed building as well as high-end architect-led new developments.

Easy Clean Sash Windows:

Our easy clean sash windows are designed for building restoration projects where access may be difficult. These windows allow for easy cleaning of the glass panes and frames from inside a period property by tilting them inwards to 50 degrees. They come in hardwood or softwood frames with various glazing options available such as safety, obscured, acoustics, and solar control glass, as well as glazing bars typical of Victorian era or Georgian era architecture.

Spring Sash Windows:

For architects looking for a modern alternative to the traditional weight-and-pulley mechanism, spring sash windows offer a stylish solution. Spring sash windows incorporate a modern spring balance system that replaces sash weights and pulleys. Instead, a concealed balance system with a spiral-shaped rod is fitted inside the window frame, balancing the window sashes according to their weight. This provides a smooth operation while maintaining the charm of a traditional sash window design.

Triple Glazed Sash Windows:

If you’re looking for a blend of classic elegance and an advanced performance, the triple glazed sash windows offered by TRC are an excellent choice. Designed specifically for professional environments, these windows combine timeless appeal with modern insulation technology. Their triple-layered glass optimises thermal efficiency and noise reduction, making them ideal for all kinds of business applications where both aesthetic appeal and functionality are paramount.

Enhanced Security for Peace of Mind

In addition to aesthetics and performance, security is a top priority for many architects. TRC recognises this, and alongside our beautiful sash windows, we are proud to offer a range of windows that are PAS24 accredited and Secured By Design approved. PAS24 is a recognised standard that ensures windows can withstand attempted forced entry, while Secured By Design signifies police-approved security standards. This means you can specify TRC sash windows with the confidence that they will provide superior security for your projects.

What Services do TRC Contracts Offer?

In addition to our high-quality sash window styles, we also provide a range of services to architects working on large-scale projects.


Our standard range of products is carefully designed with modern and historic architecture in mind. We offer an extensive choice of timber, finish, glazing, and ironmongery options so that each project can be unique. In addition to our standard range, our custom design service allows us to work in collaboration with architects and contractors in order to make windows and doors that perfectly fulfil their design brief in terms of style and performance.

Window Restoration

With over 25 years of experience in restoring timber casement and sash windows for historical buildings, TRC has become a trusted name among heritage architects and developers for our window restoration services. Our expertise ensures structural integrity is maintained while working on listed buildings and conservation areas where historic materials must be handled carefully.

Supply Only or Supply & Fit

Whether you prefer a supply only service or a worry-free integrated service from removal to installation, we have you covered. With our own specialist window installers, painters, and resin repair specialists, we can handle every aspect of your supply only or supply & fit project. We are a FENSA registered installer, meaning our installations are guaranteed to comply with all building regulations.

We also offer care, maintenance and warranty services, as well as condition surveys.

Expertise and Support Every Step of the Way

When it comes to choosing the right sash windows for your large-scale architectural projects, TRC Contracts should be at the top of your list. Our heritage timber window range offers authentic designs suitable for listed buildings as well as architect-led new developments, while our traditional timber window range caters to various design requirements with options such as box sash windows, easy clean sash windows, spring sash windows, and triple glazed sash windows.

With our expert craftsmanship, commitment to high-quality materials, and a range of services including design and window restoration, TRC has proven itself as the go-to supplier for architects across the UK.

As a trusted and reputable supplier, TRC Contracts is proud to be a member of NBS Source. Our profile on NBS Source provides architects with easy access to detailed information about our products and services, making it even more convenient for you to explore the range of sash windows we offer.

Visit our profile on NBS Source today to learn more about how TRC Contracts can meet your project requirements and deliver exceptional results.

How Can TRC Contracts Help You?

If you’re an architect working on a large-scale project and in need of high-quality sash windows, look no further than TRC Contracts. With our extensive range of heritage timber and traditional timber windows, we have the perfect solution for any design aesthetic.

Our commitment to craftsmanship, security, energy efficiency, and customer satisfaction sets us apart from other suppliers. Contact us today to discuss your project requirements and let us help bring your vision to life with our exceptional products and services.

Discover More with TRC Contracts

Choosing the right window style for your architectural design

Advancements in window restoration techniques

The benefits of triple-glazed sash windows in historic buildings


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