A selection of handy guides & information to help your home & your business thrive

Learn more about our unique products and services with the help of our comprehensive list of most frequently asked questions listed below.

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Frequently Asked Questions

What is the average cost of renovating a window?

It all depends on how much work each window needs, but standard draught-proofing without replacing rotten sills, glazing, etc. starts at approximately £600 per window. For a more accurate estimate, please call us on 0800 0277454 to arrange a free, no-obligation survey.

Can old sash windows be double glazed?

It depends entirely upon what type of window you have; however, we have developed a service that will more than likely meet your requirements, namely by replacing your existing moving sashes with new, slim double-glazed timber replicas, installed into your original box frame.

Do you offer an installation guarantee?

Yes, our work is guaranteed for 5 years.

Will new windows cut down on outside noise?

Our secondary glazing system and the Ventrolla Perimeter Sealing System (draught-proofing) have been independently tested and proven to reduce sound intrusion significantly. Find out more here.

How long will my window renovation take?

The time taken will vary depending on the result e.g., your survey and the work we identify is needed. Typically, we work to a one-window-per-day time scale, although this can be adjusted, if necessary, to suit your requirements or our schedule.

Varying from installation to installation, our average timescale targets are

• Enquiry to quote: 5 days
• Quote to order: 30 days
• Order to installation: up to 16 weeks

Should I replace my existing timber windows with new timber windows?

This is not usually necessary, however, if renovation is not a viable option, we can supply completely new timber windows designed to replicate the originals. Our advice is based entirely on the results of your survey, your personal preference, and your individual budget.

Is there a minimum order value?

Yes, there is. Offering a full renovation, draught-proofing, or bespoke new joinery service, our minimum order value is £1,500 inclusive of VAT. So, we can’t usually help with smaller works than this (e.g., broken sash cords, cracked glazing, etc.) unless they form part of a larger renovation project.

How does the Ventrolla Perimeter Sealing system (VPSS) improve comfort levels?

The main complaints we receive from customers tend to be about draughts, rattles, leaks, and heat loss from their windows. Our draught-proofing system closes the gap around the sashes, eliminating these issues whilst allowing the sashes to still travel smoothly past each other.

What kind of wood do you use?

We use a range of timbers – hardwoods like sapele, softwoods like redwood, and a fast-growing, sustainably sourced ‘super wood’ called Accoya®, which comes with a 50-year guarantee and has been specifically designed to withstand the worst of the British weather.

Can you fix window condensation?

The main way to combat condensation is to further ventilate your home (i.e. open your windows from time to time). The moisture in your home is caused by heating, bodies, etc. and it settles on the nearest cold surface, which is usually your windows. Double glazing units will be slightly less cold and therefore you may notice slightly less condensation, however, your home will also be better insulated, thus more moisture may be contained within your home.

Are your installers all Ventrolla employees and/or Ventrolla trained?

Yes, all of our staff are Ventrolla trained employees and audited to our specification. However, we’re soon launching our Ventrolla Training Academy, which may mean we use fully trained external Ventrolla representatives to carry out your works, but, rest assured, they will have undertaken our strict training programme, including quality control measures managed by our in-house team of experts.

Which areas of the UK do you cover?

At present, we operate throughout the UK, excluding the Isle Of Man, Northern Ireland, and the Channel Islands. Call our team on 0800 0277454 or email info@ventrolla.co.uk for a more up-to-date list of places we cover.

Can I buy products from you and do the work myself?

No, we’re afraid not. At present we provide a ‘supply and fit’ only service. All our products are unique to us and guaranteed, therefore they need to be fitted by skilled Ventrolla-approved Installers.

Do you only renovate wooden sash windows?

We specialise in timber sash windows, but we also renovate, draught-proof, and manufacture new casement windows, doors, Yorkshire sliders, French windows, French doors… – basically, we can renovate anything that’s made from timber!

How long will the survey take?

It all depends on the number of windows & doors you’d like us to survey and how long your consultation with our Surveyor takes. However, on average, survey’s usually take between 40 minutes to an hour.

Do I need scaffolding?

Usually, no. Where possible, we do all work in situ and take the sashes out from the inside of the property. Because of this, we ask that the rooms we will be working in are cleared of any obstructing furniture, protecting any remaining furniture with dust sheets. If scaffolding is necessary, for the safety of our team, your family, and passers-by, we will discuss and organise this with you in advance.

How do I arrange a survey?

Get in touch on 0800 0277454, email us at info@ventrolla.co.uk , or complete our online form. Our usual lead time to process a survey enquiry is 2 working days from submission. Please rest assured we value every customer that comes to us, and we will be in touch to arrange your survey as soon as we possibly can.

I live in a listed building / conservation area / AONB - can you work on my property?

Quite simply, yes, we can! We have completed lots of work over the years on listed properties and those within conservation areas and Areas Of Outstanding Natural Beauty (AONB). Working closely with local conservation and planning officers, English Heritage, Historic England, Historic Scotland, and Cadw, you can trust in Ventrolla to reinstate and sustain unique architectural features whilst simultaneously heightening historical value too.

Do you need planning permission to replace windows like for like?

As long as your repairs or replacements are ‘like for like’, e.g., replacing timber sash windows with timber sash windows, it’s unlikely you will need to apply for planning permission. Distinctions like different glazing patterns may require planning permission, as well as changes like new double glazing in flats and maisonettes.


Can you paint my windows?

We offer a wide range of renovation services; however, on-site painting is not a service we currently offer. Our Installers are trained Joiners and Carpenters, not professional Painters. That said, whilst you organise a painter and decorator, we will always prime any exposed wood to protect it from the elements in the short term. We can also provide a detailed step-by-step guide on how to paint your sash windows following your works, if required.

We can also provide a factory paint finish to any RAL colour for any new windows that we make for you.

How long will the work take to complete?

Varying from area to area, Ventrolla lead times depend on how busy we are, and the specific renovation work required. On average, our lead times range from 6-14 weeks from the date the order is placed. Your Surveyor will be able to advise you further on current lead times, and our operations team will be able to confirm exact timescales once you place your order.

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