Nationwide Coverage

uk icon

Made in the UK

40 year icon

40 Year Heritage

unique icon

Unique Patented Products

warranties icon

Extensive Warranties

Breathe new life into your property with new or renovated timber sash windows

Made from two glazed panels that slide open and shut independently of one another, the wooden sliding sash windows of today have come a long way over the last 350 years or so. Manufactured in-house using time-honoured joinery skills fused with future proof technology, with over 35 years’ worth of experience designing completely new wooden sash windows that seamlessly replicate the originals, retaining your building's authentic period styling is made easy with Ventrolla. Or, if your original timber sash windows are draughty, rattling, or inefficient, we can also provide industry-leading wooden sash window renovations with our unique patented perimeter sealing system.

Sash Window Features

What makes our timber sash windows unique?

engineering icon

Patented perimeter sealing system

ruler icon

Bespoke Georgian, Victorian & Edwardian designs

window icon

Premium timbers, glazing & hardware

drawing icon

Custom fit to your property with care

van icon

Local expertise, national coverage

Get in touch
sanding in workshop

Timber Sash Windows with industry-leading performance

Traditional but far from old fashioned

First and foremost, our timber sash windows are crafted to protect exquisite British Georgian, Victorian, and Edwardian architectural heritage from the ravages of time. Coupled with our unique blend of time-honoured joinery skills and future-proof technology, this is what sets our timber double glazing sash window products apart from the rest. Combined with efficient slimline double glazing, conservation-friendly secondary glazing, or single glazing to suit the most restricted locations, you can count on Ventrolla products to deliver the perfect balance of improved energy efficiency, security, and prized period aesthetics.

Find out more
Torrdarach House

What are the benefits of timber sash windows?

From classic six-panel Georgian arrangements to more minimalist sash window designs featuring fewer bars and more glazing, with our classic timber sash window replacements and renovations you can look forward to:

  • Increased light, ventilation & a heightened sense of space
  • Superior thermal insulation & window security
  • Listed building, conservation area & AONB compliance
  • FSC certified hardwoods, softwoods & Accoya® timbers
  • Single, double, & secondary glazing options
  • A choice of colours & anti-stain primer as standard
  • The flexibility to update aesthetics as required (e.g. repaint)
  • Excellent child safety features, e.g., less chance of trapped fingers
  • Sympathetic period designs can increase property value
  • A lifetime of enjoyment with the correct maintenance
Get in touch

Our Process



The Ventrolla journey begins with a discussion with a member of our team and/or a detailed home or site design survey, to explore your ideas & devise a bespoke plan of action.



Once our team have finalised the plans, we will provide a comprehensive estimate for your works. Enquiry to estimate typically takes between 5 and 10 working days.



Ventrolla fuse traditional skills with modern technology. If you require new joinery, creating your unique product begins in our UK-based manufacturing facility, and takes between 6 and 10 weeks.



The utmost care is taken to deliver quality products and renovation works that exceed our customers’ expectations. Varying from area to area, Ventrolla lead times depend on how busy we are, and the work required. On average, our installation team will be on site between 6 to 18 weeks from the date your order is placed. We will advise guide installation dates when you place your order.



Our customers come back time and time again – when they move or if they’ve phased their works – all thanks to our exceptional customer service and after care. In the unlikely event that your Ventrolla products require expert attention, we’re always on hand.



Renowned for delivering outstanding quality, all our work comes with a minimum 5-year guarantee (subject to terms), for absolute peace of mind.

  • Window Furniture
  • Energy Efficiency
  • Maintenance
  • Styles
  • Specifications

Window Furniture

Exquisite timber sash window ironmongery hand forged using traditional skills

Compromising on quality simply isn’t an option at Ventrolla, which is why we source our sash window furniture from the very best that the industry has to offer.

Retaining the character of your new sash windows in every aspect, our classic collection of fittings includes quality sash locks, sash lifts, sash stops, D Handles, travel restrictors, tilt knobs, and pole eyes. With a diverse range of finishes, from polished brass sash lifts to antique brass Brighton catches, and chrome plate ring sash eyes to satin nickel sash restrictors, breathing new life back into your heritage home is easy with Ventrolla.

Request a brochure
sash window furniture

Energy Efficiency

High performance timber sash windows

Timber is a naturally insulating construction material, offering superior thermal insulation where it’s needed most. Adept at keeping buildings warm and cosy whilst eliminating draughts and rattles for good, combined with efficient double glazing, secondary glazing, or single glazing, you can combat rising fuel bills and improve energy efficiency across the board with a high-performance Ventrolla installation.

Once we receive your final payment, our handy ‘Care Pack’ will be sent to you or your client which includes energy improvement certificates for absolute peace of mind.

Request a brochure
brown timber window close up


How do you clean timber sash windows?

Low levels of basic maintenance and cleaning are essential to prolonging the life of new timber sash windows. Requiring a fresh coat of paint every 6-8 years and a quick clean every 6 months, periodic timber window maintenance doesn’t need to be time-consuming.

Once we receive your final payment, our ‘Care Pack’ will be sent to you or your client which includes handy Maintenance Instructions to keep new timber windows looking their best for longer.

Request a brochure
opening white sash window


Timber sash window styles

  • Single Hung
  • Double Hung
  • Sliding
  • Picture
  • Bay










Warranty Description


Timber Sash Windows

Beige, Black, Blue, Bronze

Brown, Copper, Cream, Gold

Green, Clear, Grey, Ivory

Orange, Pink, Purple, Silver, Red

Turquoise, Yellow, White, Other



Circle, Crescent, Diamond, Elliptical

Hexagon, Kite, Octagon, Oval

Parallelogram, Pentagon, Rhombus, Rectangle

Square, Trapezium, Trapezoid, Triangle, Other




5 years

L10/10 Wood windows

L10/210 Wood windows

What our customers are saying

Ventrolla were able to beat all the other quotations that I received and answered queries quickly and informatively, making changes as required promptly and without fuss. I was kept informed throughout of lead times and manufacturing times. The real stars of the show were Rob and James who worked tirlessly and brilliantly as a team to repair sash boxes where required and install our new sashes. Thank you!


Everybody I dealt with has been super friendly, informative, and helpful. I received emails with updates on what was happening, etc. It has been a great experience from start to finish.


I used Ventrolla to renovate my sash windows over to years ago. When two of them finally collapsed, including a bay window the size of three full sized Georgian windows they were my first contact. The office staff, surveyors and the three fitters that did an amazing job installing them in less than two days were all excellent. The quality of workmanship and the standard of installation were first class, and the new windows look amazing. I will definitely be using them again as more of my windows will need replacing over the next few years.


This is the second property Ventrolla have restored my windows for me, and the this job was every bit as good as the first. 14 sash windows in a Grade II listed building installed/refurbed without a hitch in week. The team of 4 installers were lovely chaps, super efficient and tidy. All round another fabulous job done – thank you the Ventrolla Team


nbs partner
builders profile
british safety council
safety first
disclosure and barring service
Responsibly Sourced Timber Tree heart

Frequently Asked Questions

I live in a listed building / conservation area / AONB - can you work on my property?

Quite simply, yes, we can! We have completed lots of work over the years on listed properties and those within conservation areas and Areas Of Outstanding Natural Beauty (AONB). Working closely with local conservation and planning officers, English Heritage, Historic England, Historic Scotland, and Cadw, you can trust in Ventrolla to reinstate and sustain unique architectural features whilst simultaneously heightening historical value too.

Will new windows cut down on outside noise?

Our secondary glazing system and the Ventrolla Perimeter Sealing System (draught-proofing) have been independently tested and proven to significantly reduce sound intrusion.

Do you offer an installation guarantee?

Yes, our work is guaranteed for 5 years.

What is the average cost of renovating a window?

It all depends on how much work each window needs. For a more accurate estimate, please call us on 0800 0277 454 to arrange a free, no-obligation survey.

How long will my window renovation take?

The time taken will vary depending on the result e.g., your survey and the work we identify is needed. Typically, we work to a one-window-per-day time scale, although this can be adjusted, if necessary, to suit your requirements or our schedule.

Varying from installation to installation, our average timescale targets are

  • Enquiry to quote: 5-10 days
  • Quote to order: 30 days
  • Order to installation: 10-16 weeks

Do sash windows add value to a house?

Sash windows are a traditional feature of many period properties, and their style and design can add to the character and charm of the house. They also offer practical benefits, such as good ventilation and easy access for cleaning.

If your property is a period or heritage home, then having sash windows that are in keeping with the style and age of the property can be an important feature that can add value. The quality of the sash windows themselves will also be a factor. igh-quality, energy-efficient sash windows can enhance the value of the property, especially in areas with high energy prices.

Should I double glazed my sash windows?

Double glazing sash windows can offer many benefits, such as improving energy efficiency, reducing outside noise, and enhancing the security of your home. Double glazing can help to reduce heat loss and improve energy efficiency, which can result in lower energy bills and a more comfortable home. It can also help to reduce outside noise, which can be particularly beneficial if you live in a busy or noisy area.

Can sash windows be repaired?

Yes, sash windows can be repaired in most cases. Repairing a sash window can be a cost-effective solution, especially if the window has historic or architectural value, or if it’s in good condition overall but needs minor repairs.

Some common repairs for sash windows include replacing broken or damaged glass panes, repairing or replacing sash cords, repairing or replacing the sash hardware, repairing or replacing the sash frame, and weatherstripping or draft-proofing.

Depending on the extent of the damage or wear, it may be more cost-effective to repair a sash window rather than replace it entirely. However, if the window is in poor condition or the damage is extensive, replacement may be the better option.

Got questions that haven't been covered? Visit our FAQs or speak to our friendly team today:

get in touch

What to do next

Subscribe to our Newsletter

Stay up to date with the latest news and tips from our Knowledge Hub.