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Product Features

Durable Construction

Made with FSC® or PEFC certified timber and marine specification materials for coastal projects, our spring sash windows ensure longevity and sustainability.

High Performance

Fully weather-stripped and CE marked to BS EN 14351-1 A1:2010 standards, these windows provide excellent thermal and acoustic performance.

Fully Customisable

Choose from a range of paints, stains, and finishes including RAL and Farrow and Ball colour matches to suit your design.

Secure and Easy to Maintain

Internally glazed with self-engaging top sash locks and restrictors, our windows offer both security and ease of maintenance.

Wooden spring sash window

Timeless Beauty with Lomax + Wood Spring Sash Windows

Lomax + Wood’s spring sash windows are designed to match the detailing and aesthetic qualities of traditional sash windows while incorporating modern features and benefits. They are ideal for any setting, be it a new build or a renovation project, meeting both contemporary and historical design needs. Providing superior thermal and acoustic insulation, they ensure your home is not only beautiful but also energy-efficient.

These windows are versatile enough to be used in any property type, enhancing its overall appearance and value. Moreover, you can select from various glazing types and finishes to customise the windows according to your preferences. Trust Lomax + Wood for exceptional quality and performance.

Made-To-Order Spring Balanced Sash Window

The spring balanced sash window, offers a more economical solution and is often used in new builds where a flush reveal has been detailed by the architect. Factory double glazed as standard, fully weather-stripped and supplied factory finished to site. We offer you the option of a supply and fit service to ensure there is only one point of contact.

Developers regularly incorporate spring balanced sash windows where the build costs need to be competitive but the end result still needs to be historically accurate and pleasing to the eye.

Spring sash windows
Spring sash bay windows

Our Standard Specification

  • Spring balanced sash operation
  • Factory double glazed 4/16/4 tough/tough lowe argon fill to meet Part L
  • Timber parting bead
  • Elegant 20mm wide ovolo glazing bar
  • Internally glazed providing a secure anti-burglar solution and easier maintenance
  • Engineered European Redwood with a hardwood cill
  • Polished Chrome key locking sash catch and lifts
  • 1.1 W/m2K whole window U Value
  • Self-engaging top sash locks and restrictors in polished chrome
  • Fully weather-stripped for thermal and acoustic performance
  • 3 coat white factory finished spray applied micro-porous paint RAL 9010
  • CE Marked EN 14351-1+A1:2010
  • Performance tested BS3675 Parts 1,2 and 3
  • Security Tested PAS24:2016
  • Please speak to us to discuss alternative options

Customisation Options

Our timber windows and doors are made-to-order so please contact us to discuss any option that you require.

  • Factory double glazed 4/14/6 tough/laminated lowe argon fill to meet Part L
  • Hardwood Sapele
  • Engineered Larch or Oak
  • RAL Colour of your choice
  • Stained or a dual finish
Spring balance sash windows interior
Surrey traditional new build spring sash hardware

Acoustic Upgrades For Sound Insulation

With today’s increase in sound pollution we can offer a standard solution or made-to-order depending on your requirements. Please contact us for further details and to discuss your acoustic timber window requirements.

  • Additional acoustic seals depending on product.
  • 1 PPVB Silence laminated glass for standard acoustic upgrade.
  • Made-to-order option available with testing and certification.
  • Tested to BS EN ISO 10140-2:2010
  • Specifications
  • Timber Options
  • Colour Options
  • Obscure Glass Options
  • Ironmongery
  • Downloads

Specifications

Technical Specifications

ThermalStandard SpecificationOptional Upgrade
U-Valueas low as 1.1as required
g Value52%as required
LT72%as required
AcousticAcousticAcoustic+
Rw36dB38dB42dB
Weather Testing BS6375 part 1
AirClass 4
WindClass C5
WaterClass 7A
Operation & Strength BS6375 parts 2 & 3
ClassificationPass
Security
PAS 24 (2016)Part Q compliant
SustainabilityPEFC/ FSC
Chain of CustodyYes

Timber Options

Rich Timber Options

Explore our variety of timber options, including Engineered Redwood, Engineered Hardwood, Engineered Oak, and Accoya, with special timber types available upon request to suit your project’s unique requirements.

Redwood - Standard

Redwood - Standard

Meranti - Optional

Meranti - Optional

Sapele - Optional

Sapele - Optional

Oak - Optional

Oak - Optional

Accoya - Optional

Accoya - Optional

Colour Options

Explore Our Range of Colour Options

Our timber products are available in a wide range of finishes, including single colour, dual colour, and natural stained options. View our most popular RAL colours below to find the perfect match for your project’s style.

9010
9004
9003
7032
7030
7016
7004
7002
1013
6013
RAL swatch

Colour Selected:

Pure White (RAL 9010)
Signal Black (RAL 9004)
Signal White (RAL 9003)
Pebble Grey (RAL 7032)
Stone Grey (RAL 7030)
Anthracite Grey (RAL 7016)
Signal Grey (RAL 7004)
Olive Grey (RAL 7002)
Oyster White (RAL 1013)
Reed Green (RAL 6013)
Any RAL colour
9010
9004
9003
7032
7030
7016
7004
7002
1013
6013
RAL swatch

Obscure Glass Options

Customisable Glass Options

We offer a range of glass options designed to boost thermal efficiency, acoustic insulation and security. You can also customise your products further with decorative or obscured glass options.

Satin - Standard

Satin - Standard

Vision - Optional

Vision - Optional

Kathedral - Optional

Kathedral - Optional

Arena-C - Optional

Arena-C - Optional

Ironmongery

Ironmongery and Hardware

Our extensive ironmongery range features a variety of handles, locks, and accessories in different finishes and styles to complement the aesthetic of your project while providing excellent security.

Downloads

Downloadable Resources

Explore our Downloads section for detailed product information. If you have any specific questions, please get in touch. 

What Our Customers Are Saying

Lomax supplied all the doors and windows for our refurbishment. The process was easy, the doors and windows are beautiful. Fantastic service, great product, superb aftercare with minor adjustments once...
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Miranda Anderson

I had all eleven windows replaced at my Edwardian house by Lomax + Wood, Silver service, in 2015. They were an easy company to deal with and the product and...
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Ian Harrington

Absolutely brilliant. We were really worried as we were having a new kitchen installed and we thought that it could get damaged during windows/bi-folding doors installation. But nothing further from...
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Lia T

From start to finish Lomax + Wood were incredibly professional in their approach. I have very little experience in construction but from the outset they filled me with ease and...
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Hannah Pewter

I wouldn't hesitate to recommend L&W. The quality of the doors and windows they installed in our house is excellent and the service I have received from Andrew and his...
Read more

Ben Lane

Frequently Asked Questions

To better assist you with understanding our innovative spring sash windows, we've compiled answers to some of the most commonly asked questions. If you have any further queries, please don't hesitate to contact us.

What are the benefits of spring sash windows?

Spring sash windows offer traditional aesthetics combined with modern functionalities such as improved thermal and acoustic insulation, low maintenance, and enhanced security features.

Can spring sash windows be customised?

Yes, you can customise the windows with a range of colours, finishes, and hardware options, including RAL and Farrow and Ball colour matches.

Are spring sash windows suitable for coastal areas?

Yes, our spring sash windows can be made with marine specification materials and finishes, ensuring durability even in coastal environments.

Are spring sash windows energy-efficient?

Yes, our spring sash windows are designed with energy efficiency in mind. They include features such as double glazing and enhanced weather sealing to minimise heat loss and improve thermal performance .

What types of wood are available for spring sash windows?

We offer multiple high-quality timber options such as European Oak, Accoya, and Redwood. Each type is chosen for its durability, sustainability, and aesthetic appeal.

Can't find the answer you're looking for?

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Case Studies

Our case studies showcase the breadth of our expertise, from restoring historic properties to adding the finishing touches to luxury new builds. Explore our portfolio of case studies for inspiration.

Our Process

From initial consultation to final installation, we’re with you every step of the way.

Consultation and Quote

We’ll discuss your needs, preferences, and budget to provide a tailored solution. Our experts will guide you through our product range, explaining the benefits of different materials and designs. We’ll then provide a detailed quote for your consideration.

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Talking people

Product Showcase

Visit one of our showrooms to see our full sized samples up close. Experience the quality of our craftsmanship, test the smooth operation of our windows and doors, and visualise how they’ll look in your home. Our team will be on hand to answer any questions.

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Redwood Barn

Order and Survey

Once you’ve paid your deposit, we’ll arrange a detailed site survey. Our experts will take precise measurements and assess specific requirements, ensuring a perfect fit and addressing any potential issues before manufacturing begins.

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Lomax + Wood employee surveying home

Design Approval

Based on the survey, we’ll create detailed designs for your approval. This includes specifications for sizes, glazing options, hardware, and finishes. We’ll work with you to refine the designs until you’re completely satisfied.

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Lomax+Wood showroom employees

Manufacture and Delivery

Your bespoke products will be crafted in our state-of-the-art facility. We use advanced techniques and high-quality materials to ensure exceptional performance and longevity. Once complete, we’ll carefully deliver your products to your property.

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Lomax + Wood employee manufacturing window frames

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