Nationwide Coverage

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Made in the UK

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40 Year Heritage

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Unique Patented Products

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Extensive Warranties

Breathe new life into your property with new or renovated wooden 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 wooden 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 wooden sash windows unique?

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Patented perimeter sealing system

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Bespoke Georgian, Victorian & Edwardian designs

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Premium timbers, glazing & hardware

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Custom fit to your property with care

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Local expertise, national coverage

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Time-honoured techniques with industry-leading performance

Traditional but far from old fashioned

First and foremost, our wooden 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.

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Torrdarach House

What are the benefits of wooden sash windows?

From classic six-panel Georgian arrangements to more minimalist sash window designs featuring fewer bars and more glazing, with our classic wooden 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
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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
  • Specifications

Window Furniture

Wooden sash windows 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.

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sash window furniture

Energy Efficiency

High performance wooden 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.

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How do you clean wooden sash windows?

Low levels of basic maintenance and cleaning are essential to prolonging the life of new wooden 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.

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New double glazed wooden sash window specifications

  • Slim 16mm (4/8/4) double glazed units
  • Planitherm Total+ glass (outer pane) and krypton filled cavity
  • Centre Pane U-Value of 1.2 Wm²K
  • Total Window U-Value of 1.5 Wm²K

Full Ventrolla product listings are available on the RIBA Product Selector and NBC Plus websites.

Sash window removal system

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


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