Nationwide Coverage

uk icon

Made in the UK

40 year icon

40 Year Heritage

unique icon

Unique Patented Products

warranties icon

Extensive Warranties

Premium timber & aluminium window frames

Your windows do so much more than let light in. Windows allow the air to circulate and keep valuable warmth inside. Windows keep families safe and secure, whilst beautifully framing garden views for everyone to enjoy. So, when old timber windows have seen better days, handcrafted timber window replacements from Ventrolla meet and exceed all modern performance expectations whilst simultaneously retaining timeless period features bursting with elegance and character. Alternatively, minimalist aluminium windows are ideal for both historic iron and steel window replacement projects and modern new build projects alike.

Ventrolla Window Features

What makes our windows unique?

engineering icon

Patented perimeter sealing system

award icon

Award winning designs

window icon

Range of styles, finishes & hardware

working icon

In-house manufacturing

van icon

Local expertise, national coverage

curved white sash window

Heritage timber window replacements

Exquisite, naturally insulating, last a lifetime

What are the benefits of timber windows?

With a choice of classic timber sash windows or convenient timber casement windows, whether you’re looking to refurbish or replace, you can look forward to:

• Superior thermal insulation
• Reduced environmental impact & removes CO2 from the atmosphere
• Significant sound reductions via our patented perimeter sealing system
• Listed building, conservation area & AONB compliance
• FSC certified hardwoods, softwoods & Accoya® timbers
• A choice of colours & anti-stain primer as standard
• The flexibility to update aesthetics as required (e.g. repaint)
• Single, double, & secondary glazing options
• Sympathetic period designs can increase property value
• A lifetime of enjoyment with the correct maintenance

Timber Windows
long aluminum windows

Slender aluminium window products

Minimalist, thermally sound, rust resistant

What are the advantages of aluminium windows?

With our attractive aluminium casement window installations, you can look forward to:

• Advanced thermal-break technology
• High strength-to-weight ratio; 3x stronger than timber
• Modern multi-point locking systems
• Premium aluminium frames
• Highly recyclable
• Limitless colour options, including authentic woodgrain effects
• Warp, fade & corrosion resistance
• Ultimate design flexibility, enhancing a wide range of property styles
• Double & secondary glazing options
• 45 years of enjoyment with minimal maintenance

Aluminium Windows
bedroom with large white timber sash windows

21st Century machining meets traditional handcrafted sightlines

Designed to eliminate draughts, rattles and dust ingress, the Ventrolla Perimeter Sealing System was awarded the prestigious Design Council Award (Engineering Components) in 1986. Using strips of low-friction Weatherfin polypropylene pile to seal the gaps, this patented system, along with our innovative timber sash removal system, are still core heritage renovation products 35 years on.
With workshops based in Harrogate, Henley-on-Thames, and Lockerbie, manufacturing our timber products in-house gives all parties involved complete control of the process from start to finish – from customisation to pricing and everything in between.

Timber Window Renovation

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.

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

What to do next

Subscribe to our Newsletter

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