South London Sash Windows are a family run business with over ten years experience in sash window repairs. London has many beautiful properties with lovely, ornate sash windows, and we highly recommend you don’t replace them with UPVC if at all possible, there are extensive sash window refurbishment options available to you that are very affordable, and considerably cheaper than replacing in Plastic.

Our key services include sash window draught proofing and double glazing existing sash windows. Our core service area is South London. Sash window repairs are an extremely important part of home maintenance and we try to make the process as straight forward, and easy to understand as possible.

South London Sash Windows – a trusted, family run sash window repair service that has been servicing London homes since 2001

A word from our co-proprietor

I’m very happy you found your way to our little website. If you’re looking for a sash window repair service in London that you can trust, then you’ve found it.
We’ve built up South London Sash Windows from the ground up as a small independent family run window repair service based in London. We gathered a small team of skilled joiners and the rest is history.

We were just students of woodworking and we shared a love for architecture that is truly English. Then we started to realise how much our skills were needed all over London.
We’re lucky because we’re in a prime location where it’s very easy for us to get to you. We enjoy communicating with our patrons face to face to discuss what needs to be done to repair their sash windows.


Sash windows are never going to go out of style – that much is true. We seek to preserve and restore old sash windows back to their full glory, just like when they were first installed.
We at South London Sash Windows understand that every homeowner has their own unique sense of style, especially when it comes to where they live.

That’s why we work with our customers and really listen to what they want. No two sash windows are the same, just like no two trees are the same.

Because of that, we’ve never taken our business to a higher industrial scale. We’ve remained independent, doing all of our off-site repairs and manufacturing in a small workshop just outside of London.

We’ve taken the more natural route and opted for sustainability rather than convenience. This is why we choose more sustainable, eco friendly materials to go with our sash window restorations.

As long as we can help it, we’re always going to try to leave as little of a carbon footprint as possible.

Why choose us? Because we’ll get you the best value for what you pay. We have so much faith in the work that we do, that we offer a 10-year guarantee for replacement sash windows.

Any home renovation work won’t come cheap and wasting your time and hard earned money is the last thing that we want to do.

A lot of homeowners can attest to the quality of our work and we’re very proud of what we’ve done for them.

Thank you for considering South London Sash Windows for your sash window repair needs. If you end up choosing us, I can guarantee that you will be 100% satisfied with the services that we’ll provide.
South London Sash Windows is definitely a company you can place your trust on to get your sash windows in the best condition that they’ve ever been.

London Sash Windows Survey Process

When you call us, or email, we will arrange a date for survey. Typically a home in need of sash window repair takes about twenty or thirty minutes to go through. This is ample time to weigh up the best and most economical route to restoring your sash windows. This survey is free of charge and no obligation. On completion of survey we will normally give an indication of expected costs. There’s no big sell, our prices are fixed for specific services and in all likelihood the man you get on the survey, will be the man that carries out the work on your property.

Sash Windows London Repair Service

We offer a comprehensive and economical sash window repairs. London has many sash window companies offering a wide range of high quality products services. With that said, confidently London Sash Windows are proud to state “Pound for pound, on work completed in your property we will not be beaten”. This is our promise to you. Because we do not have offices, just a secretary and a workshop, we can cut out a great deal of the needless costs associated with sash windows. By cutting out the middle man so to speak, you can engage directly with professional sash window restorers. This works well because as a result of the popularity of our service, economies of scale make our sash window service cheaper still. Sash window repair is not all that complicated, and therefore, we really shouldn’t make the process expensive or add needless costs. If by some random chance you receive a better quote than ours. Please feel free to forward to us and we will verify it’s genuinely offering the same service and there are no shortcuts. If we find that we have overpriced, we will match their quote like for like. To date I do not believe this situation has occurred however.

London Sash Windows

About our Sash Windows London – Sash Window Repair Services

We offer a full range of sash windows services. Before replacing your windows entirely there’s a great deal of work we can do to fully refurbish sash windows. London is fortunately teeming with high quality builders and joiner shops. Access to high quality sill sections and rails has never been so handy. Normally we can carry out emergency repairs same day, and scheduled sash window repairs will normally have a three to four week waiting time only. Below is a list of our key sash window services.

Sash Window Sill Repair

We can replace or splice original sash window sills. This normally costs in the region of £140 – £180 per window. We can use softwood Pine or hardwood called Sapele. Both options last well with Sapele being that little bit better. That said, if you decorate your sash windows nicely then there is no reason why they won’t last.

Sash Window Sill Replacements London

Sash Windows London – Overhaul Special

We will replace all sash cords, parting bead, and staff bead. Normally when we are overhauling, we will install a draught proofing system. Surprisingly, some clients like ventilation from their sash windows, and this is exactly the service for them.

Sash Window Repair London Before & After

London Sash Windows Draught Proofing System and Prices

We offer cost effective solutions to all sash window problems. Our draught proofing systems start as little as £200 per window and this includes new furniture and an overhaul. Our sash window draught proofing system is guaranteed for five years and in almost all cases will last twice that. Longer if you frequently clean up your brush piles after we are gone. Since the brush pile is made of nylon.

There’s no limit to how long the sash window draught proofing system will last really. It’ll boil down to how caked up they are with dirt and debris as to their effectiveness. The sash cords we use are British made and designed to last in excess of twenty years. The cords have a high strength nylon core, with natural material covering to look authentic, but offer incredible strength compared with more original ‘ropes’.

Double Glazing Original Sash Windows London

Sash Windows London Double Glazing Options and Costs

If sash window draught proofing isn’t effective enough for sound proofing, we offer high quality sash window double glazing to original sashes. If your sash windows are structurally good, we can install double glazed units into the original sashes. It’s important to understand that this service is not appropriate for all sashes windows. The minimum thickness that can take a standard double glazed unit is 37mm. In some cases, or listed building situations, we can install into sashes with less depth, however the time taken increases and the process is no longer a high quality budget service.

If the original sash windows cannot be worked with, the next step up is to manufacture and install new sashes into the original frame. This service normally costs from £750 per window and represents excellent value for money when compared to entire sash window replacement. We will install high quality Pilkington Low-E units with a known lifespan of at least fifteen years. The units are so well made, and so technologically advanced that they have completely changed the way in which we can instal double glazing to sash windows.

London Sash Windows offer high quality sash window services and we welcome your call, so please contact us for a free no obligation sash window service.

The common sash window issues that we can solve for you

Old wooden sash windows are notorious for rattling and letting in draughts. This is because when they were first installed, home construction technology had not advanced to what it is now. Sash window repair in London is a very viable option.

Obviously, people weren’t able to draught proof their sash windows back in the old days. The best they could do was put on a roaring fire and cover their windows with thick drapery.

Fortunately, you won’t have to apply these hazardous solutions any longer. Once we’re done with repairing your sash windows, we guarantee that you won’t hear them rattling away whenever there’s a gale outside. Sash window draught proofing has been around for twenty years but is pretty much spot on at keeping the draughts at bay.

Those cold spots all over your home? Gone. We’ll take care of those too.

We know that during winter, it takes up a lot of energy to heat up a space that never seems to get warm enough.

By draught proofing windows, your home becomes more insulated and easier on your home’s HVAC system. It won’t have to work as hard, regulating the temperature indoors.

What does this mean? No more insanely high electric bills during the cold winter months.

We do this by installing discrete draught proofing brush piles between the parting and staff beads that hold the panes of your sash window in place.

Trust us, this is going to go a long way in the insulation of your home. It will keep the warm air in and the cold air out.

All Londoners know that it rains around a fourth of the year, so it’s you’ll still be a bit chilly even when it’s not wintertime.

Having all your sash windows draught proof will have a dramatic effect on the temperature of your home.

You won’t have to keep getting up in the middle of the night just to turn up your thermostat ever again.

Another problem that people usually encounter with sash windows is that they can sometimes get increasingly harder to open and close over the years.

This most likely because of a worn or broken sash cord. Sash windows usually have four sash cords within its sliding mechanism.

It’s advisable that you get all four replaced when you’re having trouble opening or shutting your sash windows.

But that’s not all that could be wrong with a sash window that’s hard to operate. Sometimes, after years of use, the pulley wheels get worn down. You can tell that this has happened when the sliding panel doesn’t hold up on its own anymore.

You’d have to prop it up with something, otherwise it’s going to remain permanently shut.

Another issue is the misalignment of parting and staff beads. To resolve this issue, we usually make faithful replicas made out of the same material that your frames are made of.

Or perhaps you’re just bored with how your sash windows look and you want to refresh them with a new coat of paint or varnish. We can also take care of that for you.

When you call on us to repair your sash windows, we go the extra mile in checking every aspect of what makes a perfectly functional sash window.

We won’t just focus on whatever issue you’re brought up with us. We’ll do the extra work and assess the sash window’s overall condition.

This is so you’ll know if ever some parts do need replacing. We want to make sure that we leave you with sash windows that can protect and beautify your home.

A brief history lesson on sash windows and how they’ve gotten better throughout the years

Evidence of the first sash windows date back from as early as the 16th century. They were found all over Europe because of the simplicity of their design.

Back then, sash windows were a bit different. The panels could only slide horizontally. As time went on and their popularity grew even more, various new styles started popping up from everywhere.

Of course, the mechanism that was used to operate the sash window also became a bit more sophisticated. They’re still hadn’t become the sash windows that we know today, but at least they were able to opened vertically.

This was done by drilling holes along the side of the frame and the panels has matching pegs to fit them onto. Not quite as sophisticated as the pulley system that we use now, but they were starting to get the idea.
An issue that most old wooden sash windows had was the panes. Glass just wasn’t strong yet back in the old days and they were very prone to cracking.

So to troubleshoot this issue, they used to us multiple panes in sash windows. To give you an idea, an old sash window from back then would have as much as ten panes of glass.

Obviously, the smaller the pane, the less likely it is to break.

They also had to use glazing bars and they had to make it thick to make sure that the sash window remains stable. That’s why they didn’t look very nice.

But once the Edwardian era came along, so did innovations with glass. Panes were a lot stronger and the glazing bars didn’t have to be as large.

Sash windows with just one or two panes started appearing in homes too because they didn’t crack so easily anymore.

Plus, this was a time when less was not more. People wanted to parade around their wealth by having very ornate furnishings and fixtures installed into their homes.

In fact, a very popular request to window manufacturers back then was for them to build floor length windows.

Since the quality of glass improved greatly, they were able to fulfil these requests. These large windows were usually made of just two sashes, the upper one made up of stained glass for a more refined and classy look.

And so the sash windows that we know today came to be. If there’s one thing to be said about this type of window, it’s that it has always been incredibly durable.

Of course this is now truer than ever because the technology that goes into improving sash windows have not stopped progressing since then.

But we’ve learned a lot from these old designs and the one thing that remains true is that if it’s made of hardwood, it’s going to last a long time.

That’s why even today, people opt to have their sash windows made out of solid hardwood. Hardwood is extremely sturdy.

Wood manufacturers condition and treat wood products before they are sold. This protects them from warping, rotting, shrinking and swelling.

In fact, the technology has gotten so good that people are now able to have wooden sash windows made with a warranty of up to 50 years.

Now that sounds like a good investment. If you want to improve the quality of your home, not only for your comfort, but to increase its value as an asset, choosing hardwood sash windows is a very smart move.

Granted, you’re going to have to pay more money for high quality products. But this is the kind of investment that will eventually pay for itself.

Just to illustrate just how strong sash windows are – remember the Ham House in the south of Richmond?

Sash windows were installed there as part of a renovation back in 1670 thanks to Duke and Lady Lauderdale.

Guess what, you can still see these original windows to this day. Of course, along with the rest of the estate, they’ve been preserved and well maintained over the years.

The point is, with the right materials and the proper care, a high quality sash window will last for many generations to come.

The benefits of a sash window

Sash windows became very popular because they were (and still are) very easy to clean and replace, both of which can be done from the inside. That means there would be no need to set up scaffolding.

A lot of people are just used the benefits that they get from sash windows without even being aware of them, so some of these might be surprising.

You won’t really have to do much to maintain them.

If you let a reputable company like us manufacture your sash windows for you, you’re not going to have to do much in the way of maintaining them.

This is because we would use high quality materials that will rarely ever have to be replaced, if at all.

To maintain a sash window, all you have to do is check to see how well it’s functioning. That’s all. If the wood is looking a little dull, then you might have to apply a coat of varnish on it.

Other than that, you just really have to keep it clean just like everything else in your home.

But this is if you choose sash windows made of hardwood and metal. There are some options out there for PVC and vinyl sash windows, which could be attractive to some.

These alternatives might be cheaper, but they’re not very repairable. If something goes wrong, there’s not much a repair service can do other than replace the whole unit.

That’s why it wouldn’t be so economical to go this route. Yes, they would be cheaper as a one-time purchase, but it’s very likely that you’re going to have to keep repurchasing them.

What’s worse is that they’re not ecofriendly like wood or metal. If you decide to replace your wooden sash windows instead of refurbishing them, the old wood can still be put to use.

In fact, a lot of people would pay good amounts of money for old, aged reclaimed wood so that they can repurpose it as something else.

PVC, on the other hand, is very hard to recycle. If you discard them, they will just end up in your local landfill. There’s no resell value and they can’t be repurposed.

Wooden sash window installation done correctly takes the edge off of the homeowner. You can rest easy, knowing that we have gone through all the lengths necessary to make sure that your sash windows won’t fail you even way into the distant future.

They’re a safer option than casement and picture windows.

Sash windows that we’ve manufactured are double glazed, meaning the panes are fortified to withstand a significant amount of force.

It would be difficult to break them, making your home a little safer from anyone who might have any bad intentions.

But even not counting burglary, you can avoid any glass related accidents from broken windows.

If you want to go even safer, we are able to install special locking systems as an extra precaution. This is added to the usual restrictor bolt that all sash windows usually have.

This is especially useful if you have kids in your house. Childproofing your home well is something every parent aims to do.

By having secure sash windows made, this is one step taken towards protecting your loved ones.

Sash windows keep the noise out.

If you live in the busier side of London, then having double glazed sash windows can help you sleep better at night or concentrate when you need to get some work done.

This is because double glazing also acts as soundproofing. Although you won’t be able to shut the noise out entirely, double glazed sash windows will reduce it significantly.

This would also be useful if you’re trying to keep the noise in. Maybe you don’t want to be a nuisance to your neighbour as you practice your instrument or have movie night with your friends.

Either way, having double glazed sash windows will help in keeping the noise pollution to a minimum.
They’re very functional.

As far as window types go, sash windows is the most no-fuss, functional there is. Unlike standard casement windows, you won’t have to oil hinges or buy separate locks.

Sash windows are there if you want to keep your home insulated or you want to let fresh air in. They can be opened widely, which is not something other windows are able to do.

There’s usually an obstruction (some bars or a limitation as to how widely a pane can be opened) that restricts airflow.

If you let a topnotch sash window manufacturer like us at Mortice & Green make your sash windows for your home, they are sure to be strong, reliable, and low maintenance.

Sash windows are versatility is unparalleled.

We’re used to seeing sash windows all over London, whether they be on period houses or modern flats.

There’s a reason why people keep using this timeless design and it’s simply because it looks simple and elegant.

If you’re still unsure about what type of windows you want installed, then we can attest that sash windows will match any sort of architectural aesthetic you’re going for.

We understand that this is a pretty big decision because windows are technically a permanent feature.

But trust us when we say that sash windows look great on building. This is because they’re not really bound to one specific style.

All of these can be classified as sash windows, but you could have ones that are more suited for that Victorian style or ones that are sleeker, simpler, and more suited for the chic modern look.

Whatever you decide on, sash windows have been around for a long time because they haven’t lost their charm. And we don’t think sash windows will lose it any time soon.

That’s what makes them a good investment.

Sash windows: a good investment.

Speaking of good investments, choosing to go with high quality wooden sash windows would be one. Why? Because they increase the value of your home.

This would be equivalent to having your kitchen renovated or having your yard landscaped professionally.

If you intend to sell your home in the future, a lot of potential buyers would appreciate a more classic approach when it comes to design. This is because it will never go out of style.

Plus, if you use high quality materials, not just with your sash windows, but with any fixture in your home, this increases the overall value of your property.

Even if you have no intention of ever selling your home, it’s a good idea to maintain your assets. It can’t hurt to improve your portfolio.

If you have a family, then this is all the more important. A good quality home is an a valuable thing you can pass down on generations to come.

Sash windows: they will protect your furnishings.

The two main purposes of a window is ventilation and protection. What you might not know is that anything less than double glazed panels will not do a good job of protecting your belongings inside the house.

Why? Double glazing lessens the heat and UV rays that enter your home. These two things can do a number on your household items because they affect fabrics and most organic materials.

This is why, for example, a patch of carpeting that is always exposed to the sun will look more faded than the rest of the carpet.

Sash windows: ventilation.

Ventilation is very important especially in areas that are always wet or where there’s usually smoke – so bathrooms, kitchens and living rooms where there’s a fireplace.

But there is such a thing as too much ventilation, especially when it comes to areas that rarely receive any sunlight like basements or maybe bedrooms.

If there’s too much condensation happening in these areas, this makes it a more conducive environment for mould and mildew to grow.

It probably wouldn’t alarm you if we say that this will negatively affect anyone’s health. Everyone knows this.

To take the precaution of stopping mould from ever forming, get double glazed sash windows. Why does this help?

Double glazing sash windows are able to collect moisture from the outside. This will make it easier for you to keep mould from forming because the area that you have to mind would be limited to your windows.

Keeping mould from forming in your home will keep you and your family healthy and who doesn’t want that?

They’re the most energy efficient.

Perhaps the biggest advantage to having double glazed sash windows is that they very energy efficient.

When we install sash windows, we automatically include draught proofing, which essentially keep the warm air in and the cold air out. This is, of course, when the windows are closed.

You don’t want your living spaces to be too stuffy in the summer.

But since we live in a cold climate, heating is something that we spend a lot of money on especially during the winter months.

The problem with windows that have not been draught proofed is that it makes us turn up the heating even more.

Your home HVAC system will have a harder time regulating the temperature in your home.

What’s unfortunate about this is that this problem is so preventable. Instead of paying high electric bills, you should just get the panels of your sash windows replaced.

Good home insulation can save you a lot of money. In fact, if everyone in London were to do this, we could save enough energy to heat up to 400,000 homes.

That’s a lot of wasted energy. All just because your existing sash windows aren’t doing a very good job at keeping the cold air out of the house.

It’s also worth mentioning that wooden sash windows are sustainable and we’re very ecologically aware of how we manufacture them.

Sash windows made of other materials like PVC or vinyl take as much as 8 times more energy to manufacture. That’s not really helping the environment at all.

Yes, some might argue that you would have to cut down trees to make wooden sash windows, but they will last you a long time. That means you’re not going to keep buying wooden sash windows throughout your life.

Ideally, it’s a one-time thing.

PVC sash windows, on the other hand, will definitely have to be replaced. That’s a guarantee. This is because PVC doesn’t hold up against weather very well. It’s damaged by heat and cold.

We’d be surprised if a PVC window lasts you 10 years. So with that line of thinking, wooden sash windows are lot more economical and ecologically sound.

Why choose South London Sash Windows?

South London Sash Windows can handle all your wooden window repair, refurbishment, renovation ad replacement needs. That’s a guarantee.

Let’s talk about what we can do for you. Contact us today to get a quote. We aim to restore and preserve all the sash windows of London. Why not let us work on yours?