FAQs

How long does it take to complete a sash window repair?

The duration of a sash window repair depends on the extent of the damage and the specific repair needed. It can vary from a few hours for minor repairs to several days for more extensive restoration work. This also varies depending on the size of the team and the experience present.

What types of sash window repairs do you specialise in?

We specialise in a wide range of sash window repairs, including sash cord replacement, sash window draught-proofing, double glazing, sash pulley replacement, timber repairs (including sill repairs, bottom rail repairs, meeting rail repairs and box frame repairs,) and sash window restoration.

Can you provide a cost estimate for my specific window repair needs?

Yes, we can provide a cost estimate tailored to your specific window repair requirements. Please contact us directly to discuss your needs and receive a personalised quote.

Do you offer a warranty for your window repair services?

Yes, we offer a 5 year guarantee on all our services including replacement cords, draught proofing, repairs and double glazing.

What materials do you use for draught-proofing sash windows?

We utilise high-quality draught-proofing materials such as brush seals, weatherstrips, and draught excluders. These materials are designed to effectively seal gaps and improve insulation while maintaining the functionality and appearance of your sash windows.

How can I schedule a consultation or request a quote for window repair?

You can schedule a consultation/visit or request a quote by contacting us through our website or by phone. Our team will be happy to assist you and arrange a convenient time to assess your window repair needs.

Are your window repair services suitable for both residential and commercial properties?

Yes, our window repair services are suitable for both residential and commercial properties. We have experience working on various types of buildings, including homes, offices, and other commercial establishments. (Update: being a small family business with a very long lead time, I am afraid we are not taking on any commercial, subcontracting or management agency work at present.)

Can you repair windows that have extensive rot or damage?

Yes, we have expertise in repairing windows with extensive rot or damage. Our skilled craftsmen can assess the condition of your windows and provide effective repair solutions, which may include timber repairs, splicing, or replacement of damaged sections.

Do you provide painting or finishing services for sash windows?

Yes, we provide painting and finishing services for sash windows. Our team can help you choose the appropriate paint or finish to enhance the appearance and protection of your sash windows. (Update: unfortunately due to ill health we do not have a decorator on our books as such we are not able to offer a decoration service at the moment. However, depending on your location we may be able to point you in the right direction of a decorator.)

What sets your window repair services apart from competitors?

We take pride in our attention to detail, craftsmanship, and commitment to customer satisfaction. Our team of experienced professionals use traditional restoration techniques to ensure a quality finish.

Are your repair methods and materials environmentally friendly?

Yes, where possible we prioritise environmentally friendly practices in our repair methods and materials. We strive to use sustainable materials and follow eco-friendly processes to minimise our impact on the environment. Furthermore, the path of restoration and repairing existing sash windows is a far more environmentally friendly option vs replacements.

Can you replace broken or damaged sash cords?

Yes, we can replace broken or damaged sash cords. Our team has the expertise to carefully replace sash cords and restore the smooth operation of your sash windows.

What is the expected lifespan of the repairs you carry out?

The expected lifespan of our repairs can vary depending on factors such as the condition of the windows and regular maintenance. With proper care and maintenance, our repairs are designed to be long-lasting and ensure the continued functionality of your sash windows. We offer a 5 year guarantee which is relevant to the completed repair and decoration followed (ideally within 6 weeks if possible.) As long as the windows are well maintained they will last far longer.

Do you have any customer testimonials or case studies I can review?

Many of our enquiries come from recommendations from customers and other companies alike. Our niche skills set us apart from many of our competitors which is generally why we come recommended by all our customers. We include case studies and information on our website to show the work we do on a daily basis. It is just a matter of finding time to get it all uploaded :).

Are there any maintenance tips or recommendations to keep my sash windows in good condition?

Yes, we provide maintenance tips and recommendations to help you keep your sash windows in good condition. As my colleagues would have discussed (if you were present or hopefully by phone or beforehand,) the windows do need full decoration to be completed within 6 weeks (during wet/cold months it may be advisable to only get the inside done initially until it warms/dries up again.) Leaving the windows exposed for too long could leave the windows open to damage. We recommend using lubricant spray yearly along the insides of the frame where the sashes run (or obviously whenever they might get a little tighter when expanding in wetter months. We also recommend  you clean the brushes once a year with a warm wet sponge (no products required.) Once a year if you spot any flaking paint externally, just a quick sand and touch up of paint will help to reduce the risk of rot. We always strive to do the best for our customers, just these minor bits of maintenance will ensure that the windows will last for many years to come. If they are not maintained we cannot guarantee we will honour our guarantee as poor maintenance can leave the windows at risk of rot and damage. Any further questions please let us know.

Can you repair or replace damaged or broken glass panes in sash windows?

Yes, we can repair or replace damaged or broken glass panes in sash windows. Our team can assess the extent of the damage and provide appropriate solutions, including reglazing or replacement with matching glass (depending on our supply.) It is important to note for transparency that the replacement of a pane of glass may be more cost effective with a local glazier than the need for a sash window specialist.

Do you offer any financing options or payment plans for window repairs?

As a small family business that is not an avenue we have pursued. We do have a payment structure in place which includes a deposit, middle payment (if double glazing) and final payment on the day of completion. We are able to accept payment by debit or credit card via a secure payment link.

Are your window repair services available in my location?

We provide window repair services across Greater London, Kent, Medway and across the South East of England. Other areas will be considered dependent. Please contact us with your location details, and we will confirm our availability to assist you.

Can you provide references from previous customers who have used your services?

Yes, we can provide references from previous customers upon request. We value our customers’ privacy, but we can share testimonials. If you wish to view similar works, we can supply images and we can try to organise with a previous customer for you to view them in person. This is subject to availability, as we do not wish to pressure any of our customers to invite people they do not know into their homes.

How can I best prepare my windows for the repair process?

To prepare your windows for the repair process, it is helpful to clear any obstacles or furniture near the windows. Additionally, removing any curtains, blinds, or window treatments can make it easier for our team to access and work on the windows. Parking is a vital element to most of our works. Specifically double glazing, we require parking very close to the property for access to power and to avoid our colleagues carrying windows and materials far. With other works we can carry this out with cordless tools, however, parking nearby will still be required to avoid the team carrying heavy machinery far. Please let us know if there are any issues or complications with organising parking nearby so we can assess what is feasible or not.

Double Glazing FAQ

What is double glazing and how does it work for sash windows?

Double glazing involves installing two glass panes with a gap in between to create an insulating layer of air. This layer helps to reduce heat transfer and improve energy efficiency in sash windows by minimising heat loss or gain through the glass.

Can I retrofit double glazing into my existing sash windows?

Yes, it is possible to retrofit double glazing into existing sash windows. Retrofitting involves replacing the single-pane glass with double glazing units while preserving the original sash window frames. Please check out the link to see how the process works Retrofitting – Box Sash Window Repairs Ltd

What are the benefits of retrofitting double glazing in sash windows?

Retrofitting double glazing in sash windows provides several benefits, including improved thermal insulation, reduced energy consumption, enhanced soundproofing, and increased overall comfort in your home. Verses replacements, this is a more environmentally friendly process and the quality of the timber in original sash windows is usually far superior than most of the replacements on offer today.

How does double glazing improve energy efficiency in sash windows?

Double glazing improves energy efficiency in sash windows by reducing heat transfer. The insulating layer of air between the glass panes acts as a barrier, preventing heat from escaping during colder months and entering during hotter months.

Will retrofitting double glazing change the appearance of my sash windows?

Retrofitting double glazing does not necessarily change the appearance of sash windows. There requires a deeper rebate which will reduce the depth of the internal profile. How much so, depends on the thickness of the glazing being installed. With any double glazing, it is quite common that glazing bars will need to be laminated onto a single unit per sash to maintain the appearance of the same thickness of glazing bar. This is purely due to the need to hide the spacer/sightline and doing so means there is not enough space for individual panes. We are able to help supply a clear explanation of this process should it be required for any council applications etc.

What types of glass are used for double glazing in sash windows?

Various types of glass can be used for double glazing in sash windows, including low-emissivity (low-e) glass, laminated glass, or acoustic glass. These options offer different benefits such as improved energy efficiency or enhanced sound insulation. Most commonly we install 4-4-4 and 4-6-4 pilkington toughened low-e argon filled units. The depth of the unit depends on the depth of the sashes themselves.

Can I choose different glass options for my double-glazed sash windows?

Yes, you can choose different glass options for your double-glazed sash windows based on your specific requirements. The selection may include options for thermal performance, noise reduction, safety, or privacy. We are able to supply a link to what options are available upon request.

Is it possible to retrofit double glazing in historic or listed sash windows?

Retrofitting double glazing in historic or listed sash windows can be more challenging due to preservation and regulatory considerations. It is advisable to consult with local authorities or preservation specialists to ensure compliance with relevant guidelines. We are always more than happy to assist as best we can.

How much noise reduction can I expect from double-glazed sash windows?

Double-glazed sash windows can significantly reduce external noise transmission compared to single-glazed windows. The level of noise reduction depends on factors such as glass thickness, air gap width, and additional soundproofing measures in the property.

Does retrofitting double glazing require any alterations to the sash window frame?

Retrofitting double glazing typically does not require major alterations to the sash window frame. The new double glazing units are designed to fit within the existing sash frames, minimising the need for structural modifications.

What is the process for retrofitting double glazing in sash windows?

The process for retrofitting double glazing in sash windows typically involves removing the existing single-pane glass, rebating, installing the double glazing units, ensuring proper sealing and insulation, and making any necessary adjustments for smooth operation. Please see more detail at Retrofitting – Box Sash Window Repairs Ltd

How long does it take to retrofit double glazing in sash windows?

The duration of retrofitting double glazing in sash windows depends on various factors such as the number of windows, their size, and the specific requirements. It can range from a few hours to a few days for a complete installation. Generally speaking a full team will be set up for 3 windows a day, however, if possible then more will be achieved. Smaller jobs will be taken on with a smaller team or booked in alongside other works.

Are there any maintenance requirements for double-glazed sash windows?

Double-glazed sash windows generally require minimal maintenance. Regular cleaning of the glass, lubrication of moving parts, and inspection of seals and weatherstripping are recommended to ensure their longevity and performance.

Will retrofitting double glazing in sash windows affect the operation of the windows?

When done correctly, retrofitting double glazing should not significantly affect the operation of sash windows. Proper installation and adjustments ensure that the windows can still be opened, closed, and operated smoothly. The only difference can be the ‘travel’ (how far they open and close.) This is due to the significant amount of additional weight required for operation, which will make the length of the weight longer. As such the weighting will hit the top/bottom of the box sooner than single glazed. Discounts are on offer to fix the top sashes in place to allow for the depth of the box to be used for weighting, but please ask any questions for further assistance on this.

Can I still open and close the sash windows after retrofitting double glazing?

Yes, you can still open and close the sash windows after retrofitting double glazing. The added weight of the double glazing units may require minor adjustments to the counterbalance mechanism to maintain proper balance.

Are there any additional security benefits to retrofitting double glazing in sash windows?

Yes, for 2 reasons, first is that retrofitting double glazing can provide additional security benefits by offering an extra layer of protection against forced entry. Double glazing is tougher to break than single-pane glass, enhancing the overall security of your sash windows. Secondly, the glazing we install is toughened in both panes.

Will retrofitting double glazing in sash windows eliminate condensation issues?

Retrofitting double glazing can help reduce condensation on the interior surface of the windows. The insulating layer of air minimises temperature differences between the inside and outside of the glass, reducing the likelihood of condensation forming. Ventilation however is the best form of condensation prevention.

What is the cost of retrofitting double glazing in sash windows?

The cost of retrofitting double glazing in sash windows can vary depending on factors such as the number of windows, their size, the chosen glass type, and additional customization options. It is best to request a personalised quote from a reputable window specialist.

Are there any grants or financial incentives available for retrofitting double glazing?

There might be grants or financial incentives available for retrofitting double glazing in sash windows, depending on your location and specific circumstances. It is advisable to research local government programs or energy-efficiency initiatives for potential assistance.

Can I get a warranty for the retrofitting of double glazing in my sash windows?

Yes we offer a 5 year guarantee for all our works carried out including double glazing. Realistically we would expect the glazing part itself to last far longer than 5 years though.

Draught Proofing FAQ

What is draught proofing for traditional timber sash windows?

Draught proofing for traditional timber sash windows involves sealing gaps and cracks around the window frames and moving parts to prevent the infiltration of cold air and the escape of warm air, thus improving energy efficiency and comfort.

Why is draught proofing important for timber sash windows?

Draught proofing is important for timber sash windows as it helps to eliminate drafts, reduce heat loss, improve energy efficiency, enhance indoor comfort, and potentially lower energy bills.

How does draught proofing improve energy efficiency in sash windows?

Draught proofing improves energy efficiency in sash windows by sealing gaps and cracks that allow air leakage. This helps to prevent the exchange of air between the interior and exterior, reducing heat loss during winter and heat gain during summer.

Can draught proofing reduce noise transmission through sash windows?

Draught proofing can help to reduce noise transmission through sash windows to some extent. While it primarily focuses on sealing gaps for energy efficiency purposes, it can also contribute to a certain level of sound insulation by minimising air leakage.

What are the benefits of draught proofing traditional timber sash windows?

The benefits of draught proofing traditional timber sash windows include improved energy efficiency, increased comfort by reducing drafts, potential noise reduction, prevention of dust and debris ingress, and preservation of the window’s integrity.

Is draught proofing suitable for both single and double glazed sash windows?

Yes, draught proofing is suitable for both single and double glazed sash windows. The sealing process primarily focuses on the gaps and cracks around the window frames, rather than directly impacting the glazing itself.

Can draught proofing help prevent rattling or movement of sash windows?

Yes, draught proofing can help prevent rattling or excessive movement of sash windows. By sealing gaps and improving the overall tightness of the window, it can stabilise the window’s position and reduce unwanted movement.

Will draught proofing affect the appearance of my traditional timber sash windows?

Draught proofing, when done professionally, should not significantly affect the appearance of traditional timber sash windows. The sealing materials are discreetly installed to minimise any visual impact on the window’s aesthetics.

What materials are used for draught proofing timber sash windows?

Various materials can be used for draught proofing timber sash windows, including specialised brushes, seals, gaskets, and weatherstripping. These materials are designed to be durable, flexible, and compatible with timber frames.

How long does the draught proofing installation process take?

The duration of the draught proofing installation process depends on the number and size of the windows being treated, as well as the specific requirements of the project. Generally, it can range from a few hours to a full day for a complete installation. Multiple windows worth of work may require several days to complete.

Can I draught proof my sash windows myself, or should I hire professionals?

While it is possible to attempt draught proofing sash windows as a DIY project, it is generally recommended to hire professionals. They have the expertise, experience, and specialised tools to ensure proper installation and effective draught sealing.

Does draught proofing require any modifications to the sash window frames?

Draught proofing typically does not require any major modifications to the sash window frames. The sealing materials are carefully installed within the existing structure and moving parts of the window to create an effective barrier against draughts.

Can draught proofing help reduce condensation issues in sash windows?

Draught proofing can help reduce condensation issues, but can also exaggerate them also. By minimising air leakage, it helps maintain more stable indoor humidity levels, reducing the likelihood of condensation forming on the window surfaces. However, in rooms with high humidity the draught proofing removes natural ventilation as a result means that the windows can be more likely to have condensation issues. There are several remedies including small disposable dehumidifiers and ventilating by opening your top sash.

Will draught proofing interfere with the operation of my sash windows?

Properly installed draught proofing should not interfere with the operation of sash windows. The materials used are designed to allow smooth movement of the window sashes while effectively sealing gaps when the windows are closed.

How long does draught proofing typically last before it needs replacement?

The durability of draught proofing materials can vary depending on factors such as the quality of the materials used, exposure to weather conditions, and regular maintenance. On average, draught proofing can last for several years before requiring replacement.

Is draught proofing suitable for historic or listed timber sash windows?

Generally speaking draught proofing is considered internal and is suitable. However, it is essential to consider preservation and conservation guidelines. Consultation with local authorities or preservation specialists is recommended to ensure compliance with relevant regulations.

Can draught proofing be customised to match the aesthetics of my windows?

Yes, draught proofing can be customised to match the aesthetics of traditional timber sash windows. There are various options for seals, brushes, and weatherstripping that can be chosen to blend in with the window’s original design.

Does draught proofing timber sash windows come with any warranties?

Yes, we offer a 5 year guarantee with all our works and materials.

Are there any grants or financial incentives available for draught proofing sash windows?

There might be grants or financial incentives available for draught proofing sash windows, depending on your location and specific circumstances. It is advisable to research local government programs or energy-efficiency initiatives for potential assistance.

How can I schedule a consultation or request a quote for draught proofing my timber sash windows?

To schedule a consultation or request a quote for draught proofing your timber sash windows, you can contact reputable window specialists or companies directly. They will be able to assess your windows, provide recommendations, and offer a personalised quote based on your requirements.

What are the parts of a box sash?
Common parts of a box sash window include the frame (including sill, pulley stiles, outer cheeks, inner cheeks, nosing and architrave,) the sashes, the glass panes, the sash cords or chains, the weights or springs, various hardware components (such as pulleys, axles, locks, and catches,) parting bead and staff bead.

Can you fix a sash window?
Yes, sash windows can be repaired. Common issues include broken cords and damaged or rotten timber (such as sills, pullet stiles, bottom rails, meeting rails, sash stiles and outer cheeks.) Depending on the specific problem, repairs can involve simply replacing cords/rebalancing or replacing/splicing timber sections.

Below you will see some examples of the splice repairs we carry out on a regular basis. This process involves replacing timber with timber rather than the use of resin etc to mask/patch the issue. Quite often resin repairs do not irradicate any rot issues and can cause further damage down the line. 

Customers are usually very surprised what is actually repairable. There is only a handful of times that we have had to explain that a window is beyond repair. That is simply due to the cost vs replacement options available. It is still most often better to repair than replace to maintain as much of the original material as possible. Old timber windows are generally made with superior materials than most new replacements nowadays. 

How do you remove a box sash window?
To remove a box sash window, you typically need to remove the staff bead (and parting bead,) detach the sashes from the cords and carefully lift the sashes out of the frame. The exact process may vary depending on the specific window design and installation. There is a full rundown of the process at Sash Window Draught Proofing (including overhaul) – Box Sash Window Repairs Ltd .

How do you repair a timber sash window?
Repairing a timber sash window may involve tasks such as replacing damaged wood sections, repairing or replacing sash cords, repairing or replacing hardware components, and refinishing or repainting the window frames. The specific repairs required will depend on the condition and issues with the window. More details regarding repairs can be found at  Sash Window Repair – Box Sash Window Repairs Ltd &  Sill and Frame Repairs – Box Sash Window Repairs Ltd

What is the box frame of a sash window?
The box frame forms the structure of a sash window and holds the sashes. This includes sill, pulley stiles (uprights,) outer cheeks, inner cheeks, parting bead, staff bead, nosing and architrave.

What are the side frame pieces of a window sash?
The side frame pieces of a window sash are called pulley stiles. They are the vertical pieces of the sash that form the sides of the window opening. The stile on the inside of the room is called the inside stile, and the stile on the outside is called the outside stile.

Do sash windows need servicing?
Yes, sash windows should be regularly serviced to ensure they continue to function smoothly and efficiently. This may include tasks such as cleaning (including any draught proofing brushes,) lubricating moving parts, checking draught seals, checking for flaking paint and repairing any damage or wear and tear. Maintaining these aspects can delay the requirement for overhaulling and decoration, without it would be recommended to have your windows assessed every 5 years. 

Can you replace sash windows without scaffolding?
In short yes. Sash windows are most commonly removed and installed from inside. This is not the case with all timber windows as certain windows, such as casements, do regularly require external installation. 

Can you replace one pane of sash window?
Yes, it is usually possible to replace one pane of a sash window. However, the specific process may vary depending on the type of window and the exact location of the broken pane. It is often advisable to seek professional help to ensure the replacement is done safely and correctly.

How do you remove a sash window for repair?
To remove a sash window for repair, you need to remove the beading (including staff bead and parting bead,) remove the screws/annulars holding the cords to the sash and carefully remove the sash from the frame. Once the sashes are removed, you can access the box frame and other components for repair or replacement.

How do you fix a spring on a sash window?
To fix a spring on a sash window, depending on the specific issue, you may need to replace the spring or repair other components. There are a few different styles of spring mechanism window. It is worth sending images of the mechanism in place to ensure any repairer is able to work on that specific style. Furthermore, it is often advisable to seek professional help to ensure the repair is done safely and correctly.

How do you replace an old window sash?
To replace an old window sash, you will need to remove the existing sash and box frame and install new components. The specific process may vary depending on the type of window and the exact installation. It is often advisable to seek professional help to ensure the replacement is done safely and correctly.

What is a box sash?
A box sash is a type of window with a vertically sliding sash that is counterbalanced by a weight inside the box frame via a pulley system. 

What is the difference between a window sash and a window frame?
The window sash is the movable portion of the window that holds the glass panes. The sash moves vertically (or sometimes horizontally) to open or close the window. The window frame is the stationary part of the window that holds the sashes and provides structural support to the window.

What is the difference between a jamb and a mullion?
A jamb is the frame around the sides and top of a window or door opening. A mullion is a vertical divider that separates two or more windows or doors within a single frame.

What holds a window frame in place?
Window frames are typically held in place by screws or nails driven through the frame and into the rough opening in the wall. In some cases, additional hardware such as brackets or anchors may be used to secure the frame. In traditional cases with sash windows, it is not uncommon to find they have been installed with wedges instead as a traditional method.

What is the wood around window panes called?
The wood around window panes is called a sash window. It holds the glass panes and can move vertically or horizontally to open or close the window.

What are the panels to the side of windows?
The panels to the side of windows are typically called side panels, side lights or fixed side sashes. They are usually stationary and provide additional light to the room.