High-quality timber window replacements for homes across southern england

Our superior timber window replacement options evoke a beautiful sense of nature in both commercial and domestic settings.
It is essential to keep an eye on the condition of original wooden frames in order to maintain a period property façade. However, repairing old wooden windows is not always a viable option, especially if they have been neglected over the years by previous owners.

Combined with efficient double glazing, conservation-friendly secondary glazing, or single glazing to suit the most restricted locations, the classic charm of traditional timber window frames lives on in 1000’s of period buildings and homes around the UK thanks to our exclusive range of responsibly sourced timber window products.

style of timber window can I have

What type of wood is best for windows?

At Ventrolla, we use a range of premium timbers – hardwoods like sapele, softwoods like redwood, and a fast-growing, sustainably sourced ‘super wood’ called Accoya®. It is essential to select the correct type of timber first, before you choose the style of your new timber windows.


Typically, hardwoods come from deciduous trees which are slow-growing and denser in comparison to softwoods. Chosen for superior strength, sturdiness, and weather resistance, premium hardwood windows tend to be at the higher end of the pricing scale. An intelligent investment, types of hardwoods include sapele, oak, and teak.


Most softwoods come from evergreen trees which grow at a quicker pace and are easier to shape than hardwoods but are not necessarily softer than all hardwoods. Chosen for enhanced flexibility and durability, softwood window frames tend to be more cost-effective than hardwood. Types of softwoods include redwood, cedar, and pine.


Accoya® wood is a brand name for pine that has undergone a process called acetylation. This specialist process modifies the timber to its core, making it highly resistant to rot, shrinkage, swelling, wood-destroying insects, and harsh climates. Providing a 50-year guarantee, Accoya’s® impressive protective lifespan outweighs any increased costs.

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Protecting Heritage with Bespoke Handcrafted Timber Windows

How do you know when to replace wooden windows?

There are numerous signs to look out for, including:

  • Rotten, warped or peeling frames
  • Draughts or leaks
  • Damaged or foggy glass
  • Sticking or difficulty opening and closing
  • Mould or mildew
  • Increased bills or noise from outside
  • Obsolete locking mechanisms
  • Single glazing
Heritage windows

Traditional handcrafted sight lines meets 21st century machining

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 across South England, 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.

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Can you replace windows without replacing the frame?

In some cases, it is possible to replace windows without replacing the frame, but it will depend on the condition of the existing window frame and the type of replacement windows being installed.

If the existing window frame is in good condition, and the new windows are of a similar size and shape, it may be possible to remove the old window sashes and replace them with new ones. This is known as a “retrofit” or “insert” window installation, and it can be a cost-effective way to improve energy efficiency and update the appearance of your windows without replacing the entire frame.


Ventrolla Timber Window and Restoration

Can you install windows yourself?

It is possible to install windows yourself, but it is a complex and labor-intensive process that requires a high level of skill and experience. Improper installation can result in poor performance, energy loss, and even structural damage to your home.

Window installation involves several steps, including measuring and preparing the rough opening, installing the window frame and sash, sealing and weatherproofing the window, and adding trim and finishing touches. Each step requires precision and attention to detail to ensure that the window is properly sealed and insulated, and that it functions correctly.

If you have experience with DIY projects and feel confident in your abilities, you may be able to install windows yourself with the help of instructional videos and guides. However, it’s important to note that installing windows can be a time-consuming and physically demanding process, and mistakes can be costly to fix.

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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