Quality timber window replacements, engineered to last

Evoking an unmatched sense of nature in both domestic and commercial settings, keeping an eye on the condition of original wooden frames is the key to a lasting 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 timeless beauty of classic timber window frames lives on in 1000’s of period buildings and homes around the UK thanks to our exclusive range of FSC-certified® timber window products.

living room with white sash window

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®. So, before choosing the style of your new timber windows, it’s essential to select the correct type of timber first.


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. A compelling 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 strength and flexibility, 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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brown timber window

How do you know when to replace wood windows?

There are certain 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
colourful houses

21st Century machining meets traditionally 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.

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What our customers are saying

Thank you very much for an excellent job, by some of the nicest, most professional builders I have had working here for three decades.

Mrs Schecter, Kensington

Excellent service from the fitters. Extremely impressed with their tools and equipment to carry out the works. Certainly knew what they were doing. A welcome change

Mr & Mrs Kukk, Whitby

We were most impressed with the speed of your reply, the sympathy you had with the building’s integrity, the quality of your demo kit and the attention to detail in your quote. You are an excellent advocate for your company.

Mary Sherwood

Hi Jarrod I refer to our recent telephone conversation and as agreed, attach hereto formal confirmation of my satisfaction with the works undertaken by your company. Ian and Lee are a credit to your business and from my discussions with them, I can tell that they really enjoy being part of the Ventrolla team.


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