23 Sep 2020

The chilly nights will soon be upon us and the household thermostat wars will undoubtedly commence!   As we naturally start to consider turning the heating on to keep us snug over the winter months, you may be looking for ways to conserve as much heat in your home as possible to save cranking the dial up so much that your energy bills become too hot for your purse strings to handle.

If you own a listed property, you may think that making your home more energy efficient is near on impossible, but in this blog we explore some ways that we can help improve the energy efficiency of your listed home sympathetically, without compromising its historic character.

Double glaze your windows and doors

As a listed property owner you may be thinking that approval to double glaze your property will likely be rejected by planning officers, but modernising a traditionally-built house is easier now than you might think.  Historically, requests for replacement windows and doors with double-glazing have typically been dismissed due to their inability to preserve the character of a building as much as possible, leaving owners of listed buildings with no option but to put on extra jumpers when it’s cold and rely on chopping logs all day to keep themselves warm!

Thankfully, the Wandsworth Sash Windows team are approved installers of a new kind of glass technology that not only boasts an ultra slim profile that can easily be retrofitted into all timber windows and doors (so the original historical frames are maintained), it will also save time going through the lengthy application process – no planning approval is needed.

With the width of single glazing but the warmth of triple glazing our new glass technology for listed properties is well worth considering.

Draught proofing your sash windows

Draughts in your home are an uncomfortable business and are generally caused by unwanted gaps in windows, doors with letter boxes or keyholes, loft hatches and other accidental gaps found around the house. Draughts are commonly found in historic/older properties which have sash windows and draught proofing them will ensure that less heat escapes and little to no cold air comes in.   Although it isn’t always possible to draught proof all sash windows, it is worth seeking advice on whether this procedure can be carried out at your property; it will not only rid you of cold draughts, it can save you money on your annual energy bills too.  Eliminating the possibility of hot air escaping from your home, means you can turn down your thermostat and reduce your heating temperature – saving you money.  Imagine if every household in the UK carried out this procedure on their home, the UK would save millions of pounds – enough to heat thousands and thousands of homes.

Typically, about 25% of heat is lost from windows and draughts so double glazing and draught-proofing can make an enormous difference to the energy efficiency of your property, and therefore, your general standard of living. 

If you are one of Britain’s 400,000 listed building owners, you will be aware that keeping your home in a good state of repair is vital in maintaining or even improving the heritage value of your home, and more importantly, preserving the character that you fell in love with in the first place.  If we can help you in your efforts to repair, or conserve energy in your home this winter, please don’t hesitate to give us a call 020 3993 3217.

02 Sep 2020
Since Chancellor Rishi Sunak first announced his plan (back in July 2020) to put aside £2 billion for green home upgrades, in a bid to promote energy efficiency and help boost our suffering economy following the Covid-19 lockdown, we have heard little about the details.  However, it has now been announced that September 2020 will host the launch of the much-anticipated Green Homes Grant initiative and it appears that the scheme is not quite as straightforward to utilise as first thought.  We take a closer at what has been clarified so far… (more…)

07 Jul 2020

House Plants

We are all aware of the lesson learned by judging books by their covers aren’t we?  Well, this notion also applies to historic and listed buildings – just because they are old and different looking, doesn’t mean they are not worth saving.  In fact, this could not be further from the truth.  Older buildings contribute to a community’s unique flavour and are a link to a community’s tangible past.

If a building is listed, it marks and celebrates a building’s special architectural and historic interest.  The older a building is, and the fewer the surviving examples of its kind, the more likely it is to be on ‘the list’.  A listed building will also come under the care of the planning system, so that its protection will be ensured for generations to come.  There are many reasons to preserve older buildings, let’s explore a few of the most prominent…

They hold intrinsic value

Buildings of old tend to be built with higher-quality materials such as rare hardwood and wood from primary forests that no longer exist.  Older buildings would also have been built by different standards which may make a century-old building more appealing in the long-term than its modern-day equivalents.  The intrinsic value held by older buildings are often stand out features within towns and cities and serve as a reminder of the city’shistorical roots.

Restoring old buildings has less environmental impact

Reusing and restoring old buildings almost always has less environmental impact than building new ones.  The destruction of buildings result in a large amount of waste from concrete, metals, glass, plastics, wood, asphalt, and bricks etc.   This waste is often disposed of in either landfills or incinerators, polluting the land and air.  Plus, the transportation required to remove the waste impacts on the environment too.  In fact, the UK’s biggest consumer of natural resources is the construction industry, according to a study by WRAP, the construction sector uses 400 million tonnes of material every year, which results in 100 million tonnes of waste being produced (a third of the UK’s total yearly waste amount) with 25 million tonnes of construction waste making its way to landfill.

The UK construction industry has come a long way with its recycling and reuse practices, but there is still a long way to go.  The key to this will be material efficiency, and with many old buildings boasting sustainable features, re-using, and restoring will undoubtedly have less of an impact on our environment than demolishing and building from scratch.

Listed buildings attract people

The intrinsic value held by older buildings are often preferred by new businesses for their ability to attract people in.The unique elements of older buildings is what make them more interesting and appealing.  It might be the materials used; old brick en masse or some unusually placed marble, it might be its historic roots, or an intricately decorated corner that is found intriguing.  Whatever, the ‘X’ factor is, older architecture tends to have it and makes older buildings stand out to become the talk of the town.  They are often snapped up by new businesses to fulfil new uses but with the aim to retain their magnetism within the community.

Historic buildings within a community not only add to the aesthetics and cultural values of the area, they also have a kinder impact on the environment and attract more people to the area.  Preserving them is beneficial not only for a community’s culture and heritage, but also for its local economy.  If you own a listed building be sure to check out how we can help you retrofit windows with double glazing, whilst preserving the character of your home and adhering to planning guidelines.

02 Jun 2020
Listed building

Listed building

You may have heard the term in passing, visited one in person or you may even know someone that owns one, but what exactly does it mean when a building is ‘listed’?  In this article we go back to basics and recap what a listed building is, and why (and how) a building qualifies for a place on ‘the list’.  We have also included examples of listed buildings that can be found within your local area.

What does ‘Listed’ building mean?

When a building is ‘listed’ it means it is deemed worthy enough to be included on the statutory list of buildings that boast special architectural or historical interest.  Listed buildings come in many shapes, styles, and sizes, from terraced houses to grand stately homes.

The respected status associated with Listed properties not only adds further charm and appeal to a building, it also brings some added protection to a property.  This includes extra legal protection within the planning system, as well as strict building controls.  These building controls can often make planned alterations, extensions, or demolition projects tricky to manage, but are necessary to ensure the buildings remarkable, historic elements are shielded.

How are listed buildings chosen?

Age and preservation are the main ingredients considered here.  All buildings built before 1700 which survive in anything like their original condition are listed, as are most of those built between 1700 and 1840.  The more modern a building is, the more unique it will need to be to be considered for listed building status.

Buildings that date from 1945 onwards need to be particularly carefully selected and usually a building must be over 30 years old to be eligible for listing. You can apply to Historic England for a historic building or site to be protected through the listing system.

How are listed buildings protected?

Listed buildings generally require consent for any works carried out on them.  This consent can vary greatly from property to property.  In one property, listed building consent may be required for painting a door, whilst in another consent may not be required.  The controls are put in place to ensure the correct care and protection is given to the building to help maintain as much of the original historical elements, beauty, character, and appeal of the property as possible.

Typically, the more substantial the works proposed to a listed property, the more likely they are to require consent.  The only way to be certain is to ask your local council for its opinion and consent if required.

What is the difference between grade 1 and grade 2 listed buildings?

There are three categories of listed building, based on their significance:

  • Grade I buildings are of exceptional interest and only 2.5% of listed buildings are Grade I.
  • Grade II* buildings are particularly important buildings of more than special interest and just 5.5% of listed buildings are Grade II*.
  • Grade II buildings are of special interest and the vast majority, 92%, of all listed buildings fall into this category.
  • In England there are approximately 376,000 listed building entries amounting to over 500,000 listed buildings. It is hard to be precise as one list entry for example, can cover a row of terraced houses.

Where can I find out if a building is listed or not?

The National Heritage List for England (NHLE) is the only official, up to date, register of all nationally protected historic buildings and sites in England – listed buildings, scheduled monuments, protected wrecks, registered parks and gardens, and battlefields.  However, your City Council should keep records of all listed buildings within your local area.

Listed Buildings in Kent

Have a look through the listed buildings in and around Kent, you may even find some you would like to visit.

If you own a listed building, you may be interested in our new glass technology called Fineo.  Fineo’s ultra-thin (6.7mm) profile means it can be easily retrofitted into all timber windows and doors – so the original historical frames are maintained.  You will gain all the benefits of double-glazing without needing go through the length planning application process.  If you would like to find out more about why Fineo glass is the perfect solution for listed buildings please don’t hesitate to call us on 020 3576 7500 for a chat.

06 May 2020
Bespoke Kitchens Sussex

Bespoke Kitchens SussexHindsight is a wonderful thing, isn’t it?  It would be a particularly useful skill to have before undertaking a renovation project.  Well, with the help of some local residents that have already been through the kitchen renovation mill, we’ve put together all their golden nuggets of knowledge and hindsight to create a comprehensive guide of things to consider before and during your kitchen renovation.  So, whether your kitchen requires a complete redesign, an extension, or simply a few units replacing, this guide will give you the precious foresight you need.

Before you start your kitchen renovation…

Decide on your style.  Whether, French country, cottage charm, country farmhouse or cutting-edge contemporary, decide on the look you want to achieve.  Seek inspiration from magazines, kitchen showrooms, social media and Google.  It is also a good idea to have a nosey around any friends and neighbours’ kitchens to check out what they have done.

Consider the time of year

Think about when you are going to start your project.  Early spring when the clocks go forward is a great time to start, as the main disruption will take place in late spring/early summer when you’ll have more hours of daylight, you can utilise garden space (BBQ cooking), and cold dinners are no big deal.  It is also generally, a nicer, more positive time to start a project.

Plan your budget

It is a good idea to add a 10-20% contingency to your budget and allow plenty of time.  Be realistic with time frames – do not underestimate how long things take especially when factoring in manufacture lead times and trade availability.  There will very likely be problems discovered which require lots of flexibility and patience on your part and they may add to the cost.

Pre-plan and minimise disruption

Try and pack your kitchen utensils up in order of how you use them and keep the everyday stuff to hand.  Kitchen renovations can be a lengthy process, so you’ve got to get practical particularly if you have a young family to consider.  Set up a temporary kitchen space elsewhere in the house, advisably near a bathroom where there is a tap to wash cutlery, plates and glasses.  Keep the microwave handy too and try and batch cook meals that can be stored in containers and heated up in the microwave.  After all, there are only so many takeaways you can eat (and afford!). Don’t underestimate the dust in the house.  Cover everything!  It might be a good idea to invest in plastic covers for door frames with a zip in the middle.  They are brilliant at keeping dust in the kitchen and out of everywhere else.

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Find the right people

If you don’t ask, you don’t get!  A good builder will offer his knowledge and experience up to you.  Experienced builders will have seen it all, so they are often very helpful when it comes to ideas and thinking outside the box if things don’t go to plan or you have an awkward shaped corner to contend with.  Your builder may even be able to order your kitchen for you at trade cost – it’s worth a try!  Your kitchen supplier/designer will also be able to offer their expertise in solving problems, for example there may be a longer length wall cabinet available accommodate a high ceiling.

If you are extending, it may pay off to find an architect that has a good/proven relationship with your builder.  It is important that they can work well together particularly if changes are made mid-way through the build.

No matter how good your builder and kitchen designers are, always measure everything yourself, then check and double check them.  We are all human and make mistakes so the more people checking the better.  It is also important to always check what builders/trade persons version of ‘finished’ means as it might not be what you expect.

Use builders that people you know recommend.  Research your builders thoroughly and go and speak to them face to face, this will give you a good sense of how you will work together and if you think they understand your vision.  Use certified installers, associated with a trade body (TrustATrader for example, is not a trade body it’s an advertising portal).   Make sure to check your builder has the appropriate Public Liability insurance in place.  If you are managing the project yourself and outsource anything to bona-fide sub-contractors (BFSC), ask to see their details.  After all, anyone hiding this isn’t worth working with.

Get the approval you need

If you are extending, make sure you get your drawings approved by planning and building regulations (at your local council office) before you start.  You will be surprised at the amount of people that start works thinking that permission will be a given just because other people in their road have done a similar thing.  If planning is refused, you will have to take down anything you have built.  Or you may be granted planning permission on the condition that a few necessary tweaks are made to your original plan, meaning you may have to completely start again.

Design, layout and planning…

It is important to have a thorough understanding of how you want the layout to be.  It’s got to be practical and work for you and your families’ lifestyle.  If you are aiming for an open plan kitchen/diner you may need to include a small workstation for a laptop for working at home days or maybe you’ve always dreamed of a breakfast bar for the children to sit at and do their homework while you prepare meals.  Maybe you are an active family with a wealth of muddy boots and wellies to contend with, or maybe you are a couple who love cooking and need maximum worktop space.  Your needs will determine your layout and design and whether you can fit it all into your current footprint, or whether you need a completely different set up.

Inbuilt recycling bins and microwave?  Wine fridge? Do you need cupboard for a hoover, mop or brooms?  Can you open your dishwasher doors without blocking any other cupboard doors (a nuisance particularly if it’s the cupboard where you want to put all your everyday crockery)?  Do you need a towel rail for tea towels?  Would it be beneficial to have your plates at arm-height, so you don’t need to reach too high or too low?  If you are stripping back your walls to brick and using insulation and plasterboard, make sure you account for the thickness when working out kitchen cupboard measurements.

There are lots of things to consider when deciding on your layout and design, so don’t rush it.

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Kitchen appliances

If you are working to a strict budget, try and keep the plumbing where it is.  Moving gas and water lines to accommodate the reconfiguration of sinks, ovens, stoves, or dishwashers is costly.  If you do have the budget to rearrange appliances, make sure you keep your floor plan in mind.  When it comes to layout, think about how you work in the kitchen.  When unloading the dishwasher, you do not want to walk a mile to the cupboard to put things away or have the cooker/hob too far from the fridge.

If you are having a dishwasher installed into an island, remember to take into account the gap underneath the dishwasher door which may eat into the kick panel.  It might be a great space saver to integrate your washing machine under your island, but will it work practically?  For example, when you fit the island worktop, you may want it to overhang slightly to accommodate bar stools – will you still be able to get the fabric conditioner in the washing machine tray with the worktop overhanging above? It’s the simple things!

Oh, and self-cleaning ovens are also a god send apparently!

Lighting and plug sockets

A common find is that most people undertaking a renovation project do not realise that you must think about electrics at the planning stage of a project.  Do you need extra lighting?  Maybe you need a light in a larder, or you would like new spot lighting with dimmer switches and some pendant lights over your island?  You need to consider your requirements at the start of the project as this will be vital when planning your layout – you don’t want lights shining down on top of the wall cupboards rather than shining onto your work surfaces or pendant lights hanging off centre of your breakfast bar or dining table.

The electrician will carry out a ‘first fix’ of electrics before your kitchen is fitted (to rewire), then come back to do a ‘second fix’ after installation (for fixtures).  You do not want the electrician drilling holes in your newly plastered and painted ceiling or walls at this stage due to the knock-on effect of late alterations made to the layout.  The same goes for plug sockets.  Think about where your appliances will go so you can plan where you put them i.e. where will you make tea and put the microwave?  If you are planning on having an island unit and want plug sockets on it – ones that pop up from the worktop seem to be a popular choice.

Top tips:

  • USB plug sockets are super convenient for charging phones and iPads!
  • Overhead lights are good for general illumination
  • Spotlights are ideal for lighting up specific areas where you perform tasks
  • Accent lighting is best used to highlight features in your kitchen such as under cabinets to highlight the work surface and splashback.
  • Long-lasting LED light bulbs are a great investment, some brands claim to last up to 17 years!

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Windows and floors

When it comes to your floor, make sure it is level.  It may sound like a given but a tiny amount of sloping (that you might not be able to see with the naked eye) could have a knock-on effect with everything else.  Try to have your flooring chosen before you make any key decisions as your builder will need to know how ‘deep’ each tile is to accommodate everything that’s being fitted on it!

If you are having new windows fitted make sure to factor in manufacture lead times.  At Wandsworth Sash Windows we have a 12-week lead time from the time of order, which often means customers having to think about finishes from the beginning of the project.  Another top tip is to ensure wall cupboards don’t cover any newly fitted windows when cupboard doors open.


Obviously, you will choose worktops that fit your preferred style and taste.  However, practicality does play an important part…

  • Quartz has fantastic stain resistant properties and comes in hundreds of different styles and colours.
  • Granite has been used in the industry for many years, proving itself time and time again. It has a more natural look to it but, is just as hard wearing.
  • Marble is good for a timeless, classic look. It’s a softer material than Granite or Quartz but still a great option. Marble can be treated to help prevent it from staining.
  • Wooden worktops look great but can be challenging and a little unforgiving to maintain. Treating them with oil every six months or so will help keep them looking ship-shape for longer.

When your kitchen renovation work commences…

Stay calm and make sure you play an active role.  Do not be tempted to go on holiday and avoid the chaos.  It is important for you to be around to keep an eye on what is going on and make decisions quickly (if need be) so the project is not delayed.

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Understand the running order of works

Knowing what will happen and when, will help you to check your builder is coordinating the right trades at the right times, factoring in lead times and keeping your project on track.

Get connected

There is nothing like a bit of moral support when you undertake a renovation project.  Joining a DIY Facebook group will give you an opportunity to share advice, get ideas and vent!

So, there you have it.  A ton of things to think about before embarking on your kitchen renovation journey.  Remember, we are more than just a window company.  As we have our own in-house team of skilled builders, we are able to manage all aspects of your projects.  We have undertaken a wide range of extensions, property refurbishments, loft extensions and other large projects across London and the South East.  From ground works to plumbing, electrics to tiling, landscaping to decorating, we can do it all.  Please don’t hesitate to contact us if you need us to ease the burden of your project.

31 Mar 2020
House Plants

House PlantsDid you know that there are hundreds of toxins polluting our air indoors?  Tiny particles from mould spores, house dust, pollen, cleaning products, gas cookers and cosmetics, all linger in the air and overtime, can have an impact on our health.  With many of us currently spending most of our time inside, we thought we would suggest a few easy ways to make your indoor space healthier with some pollutant-busting tips…

Open a window and ventilate your house

No surprises that we would mention this point first but opening a window and letting in some fresh air is actually one of the easiest things you can do to improve the air quality in your home is to keep it well ventilated.  It is especially useful when cooking, showering and cleaning (even if it is just for ten minutes at a time at regular intervals throughout the day).

Look out for condensation

With the weather in the UK often being wet and cold, it’s important to watch out for damp and mould growing in our homes.  Damp leads to condensation, which encourages mould and other fungi to grow and can lead to some nasty health problems.  Lots of things can cause this, from cooking to washing and drying clothes.  Condensation is more likely to happen in cold places in your household, like windows or rooms with external walls.

There are many ways that you can help reduce interior condensation including:

  • Using extractor fans in your bathroom and kitchen and opening windows after showers and baths to help circulate the air in the room.
  • Try and prevent leaks from your roof and any water damage
  • Dry your washing outside (if you can)
  • Remove any mold straight away and wipe down your windowsills regularly to keep condensation down.

Houseplants can help clean the air

Did you know that having plants around can improve the air quality in your home as well as look great on your windowsill?  Many houseplants work super hard at cleaning our air of toxins and releasing humidity back into the atmosphere.   For example, Aloe Vera emits oxygen at night whilst simultaneously taking in carbon dioxide – something we naturally produce when breathing. It is one clever plant at purifying the air and aiding a good night’s sleep.  Plus, the gel inside the spiky leaves also makes an excellent moisturiser – a great way of making your own beauty products at a time when you might not be able to get out and get any from the shops. 

Choose candles wisely

Candles may smell nice and may look lovely on your windowsill but, they can give off nasty toxins.  Most scented candles contain paraffin wax which, when burnt, releases toxic chemicals into the air and long-term exposure can be harmful.  Don’t worry though if you love a scented flickering flame at home, choose soy or beeswax candles instead.

Bust the dust

House-dust mites are common to trigger allergies and with so many of us at home over the weeks ahead, it’s important to keep them at bay as much as possible.  A regular whizz around with a vacuum cleaner will do the trick – it’s good exercise too!

We hope our pollutant busting tips are helpful in keeping your indoor space healthier.  If you are using your time at home to plan a window/house renovation project, please do not hesitate to contact us for a chat.  We are always happy to talk through any questions and queries you have even if you are not ready to start the project yet.  Call us on 020 3582 762, email info@sashwindows.london or fill in our contact form and we will get back to you ASAP.

09 Mar 2020
Wandsworth Sash WIndows Green Lane Stained Glass front door

Wandsworth Sash WIndows Green Lane Stained Glass front doorStained glass has been around for centuries, in fact, tools employed by craftsman for making glass have been known to date back thousands of years.  Traditionally, stained glass was used in British churches and became more common in houses during the Victorian and Edwardian periods.  The privileged few that boasted stained glass in their home often used them to pull rank in social status.

Today, we know that although some of the tools to create stained glass have been modernised and improved upon, the traditional skill has been retained, and stained glass windows are still hand crafted as they were centuries ago.  Unlike most window companies, here at Wandsworth Sash Windows we love working with stained glass and we are able to either repair and refit (or make new) your existing windows, or if this is your first experience of stained glass windows, we can create a brand new bespoke design especially for you.

Stained glass window repair

If you are looking to revamp or repair your existing windows, our team of very skilled craftspeople would love to help.  One of our installers will visit your home and carefully remove the existing stained glass.  The installer will do this using extreme precision as old, fragile glass is not often in the best condition.  The installer then carefully wraps and stores the glass.  We will temporarily re-glaze the openings with clear glass before we send to our workshop to be expertly glazed into new frames.  If the glass needs to be repaired in any way we may send to our friends at Bromley Stained Glass where they help us with a range of specialist works from re-soldering a small amount of lead, replacing panes within the stained glass unit with new glass that matches the existing elements, to replacing all the leadwork.

New stained glass windows

If you are new to stained glass windows or would just like to start from scratch, then we would love to arrange a design consultation to either match your existing windows or create a completely new and bespoke design with you.  Making new stained glass allows us to seal it inside a double-glazed unit to create double-glazed stained glass windows.

The manufacturing process

There is a reason why the manufacturing process of stained-glass windows has remained the same for thousands of years…because it works!  However, it is a highly skilled craft that requires time to perfect.  For the manufacture of new leaded glass, we would allow 4-6 weeks.  If replicating the existing glass, the design timeframe could be as little as 2 days, or a few weeks if there is a lot of back and forth between our team and the customer.


How much does a stained glass window cost?

We can either repair and refit the existing or create brand new designs. We can usually quote for both options.

Obviously, the price will depend on your exact requirements but as a guide:

  • We recently repaired existing windows on a property in Kings Hall Road (Beckenham, Kent) and the repairs cost around £400 for all ten panes.
  • We recently installed new leaded glass on a property in Green Lane (Chislehurst, Kent) which cost around £950.


If you are thinking about revamping your property and would like a stained glass feature, or bespoke windows, doors or shutters for your home improvement project, please do not hesitate to contact us for a chat.  We are always happy to chat through any questions and queries you have.  Call us on 020 3582 762, email info@sashwindows.london or fill in our contact form and we will get back to you ASAP.

11 Feb 2020

Certass are specialists in installer certification for the building industry.  In order to become members of Certass, companies are assessed inline with specific licence requirements and industry standards.  In a nutshell, Certass financially and technically assess its members to ensure they meet the required standards.

When did Wandsworth Sash Windows join Certass?

Having previously been members of another government authorised scheme for many years, we decided to switch our company over to Certass a few years ago.  We officially became members of the Certass Competent Person Scheme (CPS) in August 2017.  This essentially means that Certass have inspected our team of installers and surveyors to ensure they are competent in their work and have certified that our team meet the high standards held by Certass.

How has becoming a Certass member helped our business?

When it comes to finding the right tradesperson for a project, whether commercial or domestic, trust is king and being recognised by a well-known and respected trade body is a fantastic endorsement and privilege.  Being members of a respected, award-winning scheme like Certass helps us show our customers that our company and its products, services and standards are held in high regard.  Customers can also feel rest assured that the work we complete for them will be officially certified, a must-have requirement if they are planning to sell their property at some point in the future.

The Certass logo is on all of our letterheads, published materials and website which immediately puts customers at ease when they receive a quote from us through the post, read one of our brochures or browse our company online.

How does a Certass Certificate help our customers?

We specifically chose to switch to Certass due to their efficiency in issuing customer copies of certificates, something that the previous scheme we belonged to was not very quick at doing.  It is often the case that customers lose their original certificates and only realise they need it when they are selling their property, at which point they need a copy of their Certass Certificate ASAP.  If certificates are slow at being issued it causes numerous calls from customers chasing them up which is time wasting and frustrating for our customers.  Certass are also excellent at helping customers with queries after installation – being able to contact and physically speak to someone at Certass to gain advice is a service that is much appreciated by our customers.

It’s not just customers that are assured by the Certass brand either, architects and other trades that have dealt with Certass previously and found them helpful are assured by our certification and are therefore confident when recommending us to their clients.

We are now working towards becoming registered members of the Certass CQ-Assured Workmanship Scheme, as well as working towards being certified under the Certass Thermal Ratings Register (TRR) as a fabricator.

If you are looking to install sash or casement windows in the coming months, or maybe you are considering repairs to your existing windows, don’t forget we are always on the end of the line to chat through your questions and queries so don’t be afraid to give us a call on 020 3582 762, email info@sashwindows.london or fill in our contact form and we will get back to you ASAP.

06 Jan 2020


A home boasting elegant sash windows is often admired for the defined period style that sash windows evoke. However, due to the age of sash window design, there are often common misconceptions that they are not as secure as newer style window designs. But sash windows have stood the test of time for a reason.
If you are thinking about installing restrictors on your windows to restrict how far your window is able to open, you will be pleased to know that it is an easy D.I.Y task that even beginners can do. Whether you want to childproof your sash windows or add some extra security to prevent intruders, our step-by-step guide on how to install a sash window restrictor is all you need.

Where should I fit a sash window restrictor?

Typically, sash restrictors are fitted 100mm above the mid rail, so that the window can only be opened by 100mm. 100mm is the industry standard fit as it is estimated that a baby could not fit through a 100mm opening and fall out the window. For customers that do not have children to safeguard, but are concerned about security, we would recommend fitting the restrictors directly above the mid rail, so that if the bottom sash is forced open by an intruder with a crowbar (for example), then the restrictors will prevent any further movement.

Are sash window restrictors childproof?

Yes, they sure are.  Unlike sash window locks, restrictors require a key to open the window and therefore ensure a childproof sash window.

Which sash window restrictors should I use?

There are a variety of sash restrictors on the market, all of which come with their own unique installation instructions.  It is very important that you purchase your restrictors from a reputable ironmongery supplier and avoid ones from sites like Amazon that can be flimsy and unreliable.  We would recommend going to Mighton or Reddiseals.

Some sash restrictors from these suppliers are easier to fit than others. Our preferred product is the MigStop from Mighton

Install a sash window restrictor in 5 easy steps:

This is a guide to fitting the MigStop restrictor from Mighton.
Parts list:


Close and lock sash before starting installation. Measure 100mm up from top of bottom sash and mark window frame as shown above.
Drill a 10mm diameter hole 18mm deep on the marked positions on the top sash.


Using a 6mm Allen key, screw the Insert Unit (A) into the holes on both sides of the top sash.
Attach Barrel Unit (E) into Insert Unit (A) using the Key (B) provided and lower the sash. Install the Strike Plate (C) where the Barrel Unit (E) meets the meeting rail using the Screws (D) provided.


Verify device operates correctly and window opening cannot exceed 100mm.

You can de-activate/activate the MigStop by removing/attaching the barrel unit with the key provided.  Make sure you keep the key in a safe place!

If you are looking to renovate your existing sash windows this year, or maybe you are considering sash windows for the first time, don’t forget we are always on the end of the line to chat through your questions and queries so don’t be afraid to give us a call on 020 3582 762, email info@sashwindows.london or fill in our contact form and we will get back to you ASAP.

05 Dec 2019


As much as we love the twinkly lights that illuminate our living rooms at this time of year, they are not your only option when it comes to adding colour and brightening up your home during the winter months.  Here are our suggestions for some blooming lovely houseplants that will really make a festive statement on your window sill.  Keep them in the right conditions and they will impress your friends and family well into the New Year.

Five favourite plants that will make your window sill shine

    • Pretty Poinsettia
      Top of the bill is Poinsettia.  A cheery plant that are always a popular choice over Christmas for their brightly coloured brachts ranging from pale cream through to deep red, the most popular being scarlet.  Many of us dispose of these lovely plants once they have started to fade and the season is over but with a little care, you can keep them all year and they should colour up again next winter.  They will thrive in a well-lit window but will not appreciate drafts so make sure you take care of any window repairs before putting them on display.
    • Peaceful Pelargoniums
      If you like full-on colour, then pelargoniums are a must for your essential winter houseplant checklist.  They produce plenty of flowers and are a real showstopper.  Plus, scented leaf varieties will save you stocking up on festive scented candles and Ivy-leaf varieties make good trailers from a high window ledge.
    • Christmassy Cyclamen
      Indoor cyclamen originate from a wild species native to the Middle East.   They are pretty, reliable plants that look great in arrangements or on their own.  Modern fusions include those with silver marbled leaves, frilled petals, fragrant blooms and miniatures, and a range of flower colours.  Cyclamen will bloom for several months and can flower again in future years.
    • Angelic Azalea
      Indoor Azaleas need slightly cooler conditions to help the blooms last longer.  Avoid direct sunlight – a west or east-facing window sill is ideal.
    • Decorative Cymbidium Orchids
      Cymbidium Orchids make a great statement with their beautiful stems of exotic, waxy flowers.  Great for larger windows where you have a bit more space to show them off to their best advantage. These will look good right through till next spring when you can cut them back and neaten them up for the new season’s growth.

    So, there you have it…plenty of options to deck your halls and your window ledges to keep the festivities going until spring.

    If you are looking to undertake a project in the new year, we are always on the end of the line to chat through your questions and queries so don’t be afraid to give us a call on 020 3582 762, email info@sashwindows.london or fill in our contact form and we will get back to you ASAP.