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Knowledge Hub

Learn how to get the very best from your heritage building

Knowledge Hub

About Ventrolla

As heritage specialists, Ventrolla is obsessed with restoring heritage timber windows and doors, and has been for over 40 years.

Our Team

We share a deep passion for preserving heritage, combining exceptional craftsmanship, attention to detail, and decades of experience.

Our Team

Projects

Working with some of the most discerning heritage property homeowners and retrofit architects, contractors, and surveyors on their restoration projects.

Projects
brochure

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Our helpful brochure explains all about our timber restoration and replacement services.

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Timber Windows

With nationwide coverage, you always benefit from local British craftsmanship.

Timber Doors

Manufactured in our bespoke joinery houses.

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Give your heritage building the craftsmanship it deserves.

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brochure

Request a Brochure

Our helpful brochure explains all about our timber restoration and replacement services.

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Consultancy & project management

Ensuring seamless and efficient execution for commercial projects.

Consultancy & project management

Projects

Working with some of the most discerning heritage property homeowners and retrofit architects, contractors, and surveyors on their restoration projects.

Projects

Cumbria

Sash Window Repair and Timber Window Restoration in Cumbria

In Cumbria, a window or door is as much a shield as a feature. Lake District farmhouses weathered by centuries of upland winters, Georgian townhouses in Kendal and Carlisle, stone-built cottages set into hillsides across the Eden Valley. For more than 40 years, Ventrolla has been restoring the timber windows and replacing doors that hold these heritage buildings together. Draught-free, watertight, faithful to the original character, and ready for whatever the next Cumbrian winter throws at them.

Sash Window Repair and Timber Window Restoration in Cumbria

Why choose Ventrolla for your windows and doors in Cumbria

British Craftsmanship

British Craftsmanship

Every window handcrafted by our master joiners.

Sustainably sourced

Sustainably sourced

Durable, premium timber built to last.

Listed Property specialists

Listed Property specialists

Our national team of master craftsmen, have unrivalled knowledge and expertise.

Rated excellent on Trustpilot

Rated excellent on Trustpilot

Five-star reviews from heritage property owners across the UK.

Over 1 million windows restored

Over 1 million windows restored

Four decades of specialist window restoration and timber doors expertise.

Nationwide service

Nationwide service

Locally based surveyors and craftspeople.

Our Cumbria window restoration work

Before

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After

After Image

From small-pane sashes in stone-built cottages to Georgian restoration in market-town townhouses, to bespoke heritage joinery for country houses and farms, our gallery shows what authentic window restoration looks like.

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Renovation double glazing in Conservation area property

Before Image

Timber Doors

After Image

From small-pane sashes in stone-built cottages to Georgian restoration in market-town townhouses, to bespoke heritage joinery for country houses and farms, our gallery shows what authentic window restoration looks like.

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Trusted by many

Ventrolla in your words

Excellent

Star rating
Trustpilot
Star rating

Installation and Repair of Sash Windows

The service provided by Paul and John was excellent. They explained very clearly what they were doing managed to complete the work before the time budgeted and I would have no hesitation in recommending them.

Andrew Kennard

Star rating

Very good service from the whole Ventrolla team!

Very good service from the whole Ventrolla team. Great installation from Paul and John, and a very clever solution from Davie who measured up. They found a way to put a window in a 300 year old house which had been bricked up for 100+ years and was wonky in every way imaginable. Thanks and well done also to Hayley for the helpful and flexible organisation and the after sale service on a previous job too.

Craig Oliver

Star rating

New pair of hardwood heritage sashes

We have just had our timber sash windows in out front bedroom, of our 2 up, 2 down, Victorian terrace refurbished by Ventolla. We had replacement hardwood sashes and heritage double glazed units. We are in a conservation area so we have to retain the timber looks. Mark and Carl arrived promptly at 8am and set about the job. They were great. Really nice friendly guys, did a cracking job and left the bedroom tidier than when they started ! The windows look great. Mark ran us through the process of how to remove them for painting .. looked surprisingly simple. They look great, room is definitely warmer and quieter and condensation was massively reduced. Would definitely recommend.

Jonathan Bennett

Heritage window specialists for period homes across Cumbria

Cumbria’s heritage properties often sit within the Lake District National Park or within one of the county’s many conservation areas, which means sensitive, conservation-led restoration is essential.

Our surveyors are familiar with the planning considerations that apply here, including listed building consent and the material and profile requirements within protected landscapes. We work closely with conservation officers and heritage consultants to ensure every restoration respects both the building and the wider setting. Our Ventrolla Consult service supports you navigate planning consent.

The award-winning Ventrolla Perimeter Sealing System (VPSS™), bespoke joinery and full glazing range deliver restoration that’s genuinely weather-ready – faithful to the building, and built to last in the Cumbrian climate with up to 30% energy efficiency and noise reduction.

Your neighbours trust us too

We’ve been in your neighbourhood

Our Cumbria team restores windows in residential and commercial buildings across Kendal, Windermere, Ambleside, Grasmere, Keswick, Cockermouth, Penrith, Appleby, Carlisle and Ulverston – as well as in rural locations throughout the Lake District and Eden Valley.

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our promise

Up to

10 years

Manufacturing guarantee

Up to

20 years

Window glazing guarantee

Up to

10 years

Paintwork finish guarantee

Up to

30 years

Rot and decay guarantee

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About Cumbrian architecture

Cumbrian windows tend to be modest – small, deep-set openings in thick stone walls, combined with later Georgian and Victorian sashes where expansion brought grander detailing. Weather is the defining factor: cills rot faster, putty fails earlier, paint breaks down more quickly, draughts run stronger.

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accreditations

Complimentary window survey in Cumbria

Book a complimentary window survey with one of our heritage surveyors to provide advice on the options available to you. We provide practical advice on restoration vs. replacement to guide on whether your windows can be restored rather than replaced. If windows are beyond repair we will provide you with the best options for replacement to ensure your period home retains its original features whilst improving performance.

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ENQUIRE

Ventrolla House
Unit C2 Crimple Court
Hornbeam Business Park
Harrogate
Yorkshire
HG2 8PB

T: 0800 0277454
E: info@ventrolla.co.uk

Frequently asked questions

01

Can original sash windows be restored in older Cumbrian properties?

Yes. Many period properties throughout Cumbria still retain their original timber sash windows, and in many cases these can be successfully restored rather than replaced. Even windows affected by draughts, worn components, sticking sashes or areas of timber decay can often be repaired using specialist restoration techniques.

Restoration allows homeowners to preserve the character and craftsmanship of traditional windows while improving their overall performance. For older cottages, townhouses and heritage properties across Cumbria, retaining original features can help maintain both the appearance and value of the building while extending the lifespan of the existing windows.

02

What problems can sash window restoration solve?

Professional sash window restoration can address a wide range of common issues that develop as windows in your Cumbrian property begin to show sins of age. These may include rattling sashes, broken sash cords, poor operation, excessive draughts, damaged putty, loose joints, deteriorating paintwork and timber decay.

Rather than replacing an entire window, restoration focuses on repairing and upgrading existing components wherever possible. This approach helps restore smooth operation, improve comfort within the home and protect the long-term condition of the windows while preserving their original appearance.

03

How does Cumbria’s climate affect timber sash windows?

Cumbria’s weather conditions can place additional demands on traditional timber windows. High rainfall, fluctuating temperatures and prolonged exposure to moisture can gradually affect paint finishes, timber surfaces and window components if regular maintenance is not carried out.

Ventrolla’s restoration techniques can help address weather-related deterioration by repairing damaged timber, improving weather resistance and ensuring windows operate correctly. Regular maintenance and timely repairs can play an important role in protecting timber sash windows from the effects of the local climate and extending their service life.

04

Can restoring sash windows improve energy efficiency?

Yes. Older sash windows are often associated with heat loss, but professional restoration can significantly improve their thermal performance. Modern draught-proofing systems can help reduce unwanted air leakage, while secondary glazing can provide additional insulation without altering the appearance of the original windows.

These upgrades can help create a more comfortable living environment throughout the year by reducing draughts and improving heat retention. For many homeowners in Cumbria, restoring and upgrading existing windows offers a practical way to improve energy efficiency while preserving period features.

05

Is sash window restoration suitable for listed buildings?

In many cases, yes. Restoration is frequently considered the most appropriate approach for listed buildings because it retains original materials and architectural details wherever possible. Many heritage properties rely on traditional sash windows as an important part of their historic character.

By repairing existing windows rather than replacing them, restoration can help maintain the authenticity of the building while addressing practical concerns such as draughts, security and functionality. Property owners should always seek appropriate guidance when undertaking work on listed buildings, but restoration is often viewed favourably where original features can be retained.

06

What is involved in a sash window survey?

A professional sash window survey provides a detailed assessment of the condition of your existing windows. During the survey, factors such as timber condition, operational performance, glazing, ventilation, draught issues and overall structural integrity can be evaluated.

The findings help determine which repairs or upgrades may be required and whether restoration is a viable option. A thorough survey ensures homeowners receive recommendations tailored to the specific needs of their property rather than relying on a one-size-fits-all solution.

07

Can secondary glazing be added to existing sash windows?

Yes. Secondary glazing can often be installed alongside existing sash windows to improve thermal efficiency and reduce external noise. Because it is fitted internally, it allows the original windows to remain in place while providing additional insulation benefits.

This makes secondary glazing particularly attractive for period Cumbrian homes where maintaining the property’s original appearance is important. It can also be an effective solution for homeowners looking to enhance comfort without replacing traditional timber windows.

08

How often should timber sash windows be maintained?

Regular maintenance is essential for keeping timber sash windows in good condition. Periodic inspections can help identify minor issues such as cracked paint, small areas of timber deterioration or worn components before they develop into more significant problems.

While maintenance requirements vary depending on exposure to the elements and the condition of the windows, proactive care can help preserve their appearance, improve durability and reduce the likelihood of costly repairs in the future.

09

Why are timber sash windows valued in period homes?

Timber sash windows are often regarded as one of the defining features of traditional British architecture. Their proportions, detailing and craftsmanship contribute significantly to the character of many period properties throughout Cumbria.

Retaining original windows wherever possible helps preserve the authenticity heritage Cumbrian buildings and maintain their architectural integrity. Restoration allows homeowners to continue enjoying these traditional features while benefiting from modern performance improvements where appropriate.

10

Why choose sash window restoration instead of full window replacement?

Restoration offers a way to improve the condition, performance and longevity of existing windows while preserving their original appearance. For many period properties, replacement can result in the loss of historic detailing and character that cannot easily be replicated.

By focusing on repair, refurbishment and sympathetic upgrades, restoration can deliver improved functionality, reduced draughts and enhanced comfort while retaining the features that make traditional timber sash windows so distinctive. It is also a more sustainable option, helping to reduce waste by extending the life of existing materials.