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

The UK’s first choice for quality timber window & door renovations

Our various industry memberships and certifications provide absolute peace of mind that the highest levels of quality and performance are consistently upheld.

Trusted by some of the UK's largest companies, the following accreditations and training programs allow us to exceed our discerning customers' expectations
time and time again.

fensa approved

FENSA Approved Installers

The Fenestration Self-Assessment Scheme (FENSA) was set up in 2002 as a government-authorised ‘Competent Person Scheme’ for the replacement of windows, doors, roof windows, and roof lights in England and Wales. FENSA registration ensures your renovation work meets the relevant Building Regulations.

Regularly assessed by FENSA, Ventrolla Ltd t/a Ventrolla is FENSA registered and can provide our customers with FENSA certificates for their work. Membership number: 34171.

construction line


Constructionline is a register for pre-qualified contractors and consultants. It provides procurement and supply chain management services designed to make contracting simpler for main contractors, as well as central government and local authorities.

Ventrolla holds Constructionline membership. Registration number: 179345.

builders profile

Builders Profile

Builder’s Profile is an open-access Common Database service providing compliance and PQQ information to the construction industry.

It enables subcontractors (and suppliers) to easily maintain and share information. For main contractors and clients, it provides all the information, documents, and tools required to manage a supply chain, no matter how large or small.

nbs partner

NBS Plus

NBS Plus is an online directory of building product manufacturers created to help architects, engineers, designers, and contractors work smarter and reduce risks.

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RIBA CPD Provider Network

The RIBA CPD Providers Network consists of manufacturers, suppliers, training companies, and advisory organisations that provide RIBA-approved CPD to architects and other specifiers.

Ventrolla provides RIBA-approved CPD to architects and other specifiers.

Find more information in our CPD section.

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British Standards - ISO 9001 & 45001

The British Standards Institution (BSI) produces technical standards across a variety of industry sectors in the UK.

ISO 9001 is the internationally recognized Quality Management System (QMS) standard, designed to be a business improvement tool. It helps us to consistently provide high-quality products and services that meet customer and regulatory requirements.

BS OHSAS 45001 sets out the minimum requirements for occupational health and safety management best practices. It helps us to reduce workplace hazards and boost employee morale.

Ventrolla holds BSI certification. Certificate number: FS 35500.


British Woodworking Federation Membership (BWF)

The British Woodworking Federation is the trade association for the woodworking and joinery manufacturing industry in the UK. All BWF members are assessed via a strict Code of Conduct that sets out the principles of good practice for woodworking and joinery businesses.

By gaining access to specialist technical support and guidance, BWF membership also puts your mind at ease knowing that our woodworking processes are safe, sustainable, and compliant.


Contractors Health and Safety Assessment Scheme (CHAS)

CHAS is a trusted advisor on health & safety compliance, helping set industry benchmarks, provide assurance and reassurance.

Ventrolla Ltd is accredited with CHAS, having demonstrated compliance with and sound management of current health and safety legislation.


Construction Skills Certification Scheme (CSCS)

CSCS is the leading skills certification scheme for the UK construction industry. CSCS cards are held by individuals and provide proof that said individuals who work on construction sites have the required training and qualifications for the type of work they carry out.

All Ventrolla Installers hold CSCS cards.

Responsibly Sourced Timber Tree heart

Responsibly Sourced Timber

Ventrolla believes in the protection and responsible management of the world’s forests.

Ventrolla sources all our timber products from ethical suppliers of sustainable timber.


Accoya® timber

Accoya® is a long-life modified timber that goes through a cutting-edge patented process called acetylation, which enables it to resist rot, defy the elements and stay strong for decades. Its amazing strength is proven via a 50 Year Manufacturing Guarantee.

We use beautiful Accoya® as part of our new joinery made in our workshops, where needed. Ask your Surveyor for further details on our superb Accoya® collection or visit our Downloads section.

british safety council

British Safety Council

The British Safety Council is dedicated to protecting employee wellbeing, making sure no-one is injured or made ill in the workplace.

Our British Safety Council Membership helps us manage legislation and compliance while systematically improving health, safety and environmental standards to make sure our workforce remains healthy and safe at all times.


International Powered Access Federation (IPAF)

IPAF promotes the safe and effective use of powered access equipment worldwide.

All members of the Ventrolla Installation Team hold IPAF Certificates.


The Prefabricated Access Suppliers' and Manufacturers' Association (PASMA)

PASMA is the recognised authority for mobile access towers, ensuring safety standards and best practice guidelines are met when working at height.

All members of the Ventrolla Installation Team hold PASMA Cards.

safety first

Site Supervisors Safety Training Scheme (SSSTS)

Site Management Safety Training Scheme (SSMTS)

Continually investing in our team, all Ventrolla Supervisors and Project Managers are supported through these CITB courses.

disclosure and barring service

Disclosure & Barring Service (DBS)

The DBS carries out criminal record checks that result in DBS certificates being issued to an individual. Employers can then ask to see this certificate to ensure they are recruiting suitable candidates into their organisation, primarily to avoid unsuitable people from working with vulnerable groups.

For complete peace of mind, all Ventrolla on-site employees (Installers and Surveyors) are DBS enhanced checked as standard and hold personal DBS Certificates.

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.

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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