Sash Windows

Putting Style and Beauty Back Into Your Home

Closely resembling the look of traditional timber box sash windows, our EcoSlide vertical sliders offer the character and charm of a traditional sash window with the long term performance of modern production materials. Our vertical sliding sash windows have excellent thermal properties – they are A rated as standard, so when upgrading your windows you will conserve heat and reduce your heating bills.

Period Charm with Modern Performance

Our EcoSlide vertical sliding sash windows capture the authentic appearance of period timber box sash windows while delivering the performance advantages of contemporary uPVC construction.

The thermal performance is exceptional – achieving A-rated energy efficiency as standard. When you upgrade to our vertical sliding sash windows, you’ll notice improved heat retention and lower heating bills throughout the year.

The advanced weathering system ensures your windows maintain their pristine appearance season after season. You get the aesthetic appeal of classic vertical sliders alongside the practical benefits of modern uPVC windows, including minimal maintenance requirements and excellent weather resistance.

Award-Winning Sliding Sash Window Installation Since 2004

We’ve been installing ECOSlide uPVC sliding sash windows for over 20 years, building extensive expertise in this specialist product. Our commitment to quality installation was recognised in 2020 when we won both Installation of the Month (July) and Installation of the Year awards for our outstanding Roehampton project – you can read the full article here.

When you choose our sliding sash windows, you improve your home’s appearance while maintaining high standards of style, security and energy efficiency. Our vertical sliders deliver the authentic look and operation that makes sash windows so distinctive.

Whether you’re renovating a period property or simply prefer the classic sash window aesthetic, our EcoSlide range offers an ideal solution. The windows work smoothly, look authentic, and perform reliably for decades with minimal upkeep required.

Sliding Function

Our vertical sliding sash windows operate just like authentic wooden box sash windows, with both the top and bottom sashes moving up and down independently. The two sashes slide smoothly and effortlessly, making them simple to use for ventilation control throughout your home.

Each sash works on a precision-engineered balanced load mechanism that holds the window firmly at any height you choose. This advanced spring balance system means the sashes won’t slip or drop unexpectedly – they stay exactly where you position them. You can open the top sash, bottom sash, or both together, giving you complete control over airflow. The multi-point locking system integrates seamlessly into the frame design, providing excellent security without affecting the authentic appearance.

Tilt Function

Both sashes feature an inward-opening tilt facility, making window maintenance remarkably straightforward. This clever design allows you to clean the outside glass and frame safely from inside your home – no ladders required. The tilt function proves particularly valuable for upper floor windows or those positioned above conservatories and extensions where external access would be difficult or unsafe.

To use the tilt function, simply unlock the sash and pull the top gently towards you. The window tilts inward at an angle, bringing the external glass surface within easy reach. You can clean both sides of the glass thoroughly from the comfort of your room, then lock the sash securely back into place when finished. This feature makes regular maintenance straightforward and safe for all household members.

Colours and Effects

Timber box sash windows were always painted and you can replicate this look with solid white and cream colour options. If you would prefer a more natural wood effect, the crystal white, cream, golden oak and Irish oak foils give a realistic woodgrain appearance that mimics the grained texture and appearance of an original timber window. 

We also offer the option of a colour on the outside and white on the inside – choose from Chartwell green, anthracite grey, rosewood, black brown, cream, golden oak and Irish oak. With this option you can have the external colour you like, whilst maintaining a white interior to better suit your home’s decoration.

Authentic Design

To complete the timber-like appearance, our windows incorporate the same stylish features found on original timber sash windows such as astragal bars, decorative sash horns and traditional-style operating hardware.

The jambs, sash sections and meeting rail are all engineered to look just like a timber sash window, giving you truly authentic looking new windows.

Spraying and Colour Matching

Are you after something more unusual or do you want to match up a particular colour?

Our EcoSlide paint service enables your sash windows to be spray painted to match virtually any RAL code or colour. It is applied to the highest standards and will provide a unique and colourful addition to your home.

You can personalise your EcoSlide vertical sliding sash windows and colour co-ordinate them to match your property or just to suit your own personal tastes.

Shapes

A range of styles are available to match your existing windows as closely as possible and maintain the character of your home.

Arched and swept head sash windows are manufactured according to your exact requirements, including the eye-catching Gothic and Norman style arches. Other more standard design options are available with external astragal bars for an authentic glazing bar look.

The Finishing Touches

Add the finishing touches to your new windows with traditionally-styled vertical slider hardware. Pole eyes, tilt knobs, sash lifts, sash locks and travel restrictors are fitted as standard, but we can also offer D handles if required. All hardware is available in chrome, gold, white, black or satin chrome to complement our range of colours. Other additional options are available such as Georgian or Astragal glazing bars and trickle vents, to give your new windows a truly authentic and classical vertical slider look.

In addition to this, our EcoSlide uPVC sliding sash windows are designed to be extremely safe and secure. High performance locking systems keep your home safe from potential intruders to give you extra peace of mind. For added safety we also offer the option of a “Fire Egress” window design to provide emergency escape.

What Our Customers Are Saying About Us

4.9
(215 Ratings)
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Doreen Conteh profile pictureDoreen Conteh
18:01 12 Dec 25
I had a porch fitted and changed a ,back door and a few windows. Really pleased with the quality of the work. Excellent professional service from surveyor and office staff as well.
Richard SoundVault profile pictureRichard SoundVault
17:10 05 Dec 25
Always great service. Friendly and on time.
Harriet Low profile pictureHarriet Low
17:38 28 Nov 25
We love our new window and backdoor! It has made such a difference to our home. We always use Ruislip Doors & Windows, & they have never let us down!
Dipesh Mistry profile pictureDipesh Mistry
09:49 21 Nov 25
Great service, would recommend.

The fitters Fernando and Casio were great. Did a great job cleaning up after a quick installation.
Poonam Shah profile picturePoonam Shah
13:17 12 Nov 25
We contacted Ruislip windows and doors to fix a broken window pane at our house. They provided a competitive quote and fixed the pane within a short space of time. They were courteous and provided an excellent level of service. We will be sure to use them when needed again and recommend them to everyone.
Paula Heasman profile picturePaula Heasman
12:05 08 Nov 25
Ruislip Windows replaced my windows throughout my house. They did a fab job and worked really hard each day, not even stopping for lunch. They protected my property from any mess and we're very polite. Would definitely recommend them. Very happy with my windows!
dinesh Chotai profile picturedinesh Chotai
16:04 06 Nov 25
I have not had a chance to visit the property however my tenants are impressed by low sound levels and warmth. I asked the tenants to send me the photos of the new windows are installed. I am very happy with the service we received when me and my daughter visited their showroom/offices in watford. The service was excellent from start to finish. I will definitely use the company again and will recommend to my friends and family.
neil mccabe profile pictureneil mccabe
12:42 06 Nov 25
Pleasure to do business with. Residence R9 windows are top quality and would thoroughly recommend supply and fit by Ruislip W&D's . Fitters were also very experienced, knowledgeable and calm...
Roni Kurian profile pictureRoni Kurian
22:52 03 Nov 25
Thank you so much Ruislip Windows and Doors limited for helping me with my windows..My old windows were in real bad condition and I phoned the company and they helped with the quote and Yakub and his colleague helped to fix the new windows with perfection.. Cleared all the waste stuff from my house and I like to thank John also for the help from start to end.. Keep up the good work
Vic Daltrey profile pictureVic Daltrey
18:34 28 Oct 25
We needed our landing window replaced and Ruislip Windows did a splendid job. The leaded lights were copied and look like the originals. The chap fitting it was polite and caring and left the sight all clean and tidy.
Altogether an impressive result.
Teresa Pedro profile pictureTeresa Pedro
12:41 23 Oct 25
Quick quote, competitively priced and lead time realistic. Extremely happy with the service despite wrong type installed initially but quickly and professionally rectified. John kept me informed and Tom and Mark carried out the work.Both were Cheerful and hardworking. I will certainly recommend this company.
James Winter profile pictureJames Winter
10:25 20 Oct 25
Very painless service. Work was carried out on time and with minimal disruption. The finish is superb and the windows look great. Thank you.
Alan Evans profile pictureAlan Evans
09:47 20 Oct 25
The two man team were wonderful fitting both windows and doors. We couldn’t have been happier with their work and also the way they were in the house. We felt they went above and beyond to make sure everything was right. I would absolutely recommend this company.
Steve profile pictureSteve
14:53 28 Mar 25
We contacted Ruislip Windows about replacing our porch and was pleased to find they could fit new front, side panels and trim and use the original roof and frame. The whole process from Mark visiting to discuss what needed doing to Rob and Ryan fitting the new parts was excellent, all old parts were removed same day and everything was kept clean and tidy. Rob's eye for the finishing details was second to none.
We have used Ruislip Windows before and would recommend them to anyone that asked.
Thank you to everyone we spoke to, we are well pleased with the final item.
Steve and Jenny Welsh
Peter Jones profile picturePeter Jones
15:20 06 Dec 24
The surveyor was very helpful when he came to measure up and advised us on the types of installations available and when we could expect the installation of our doors and windows.
We received a text, within the period advised by the surveyor, asking us when would be a convenient time for the installation.
On the day of the installation the first fitter arrived early in the morning and started removing the old windows and doors. Soon after a second van arrived with the replacement doors and windows and installation commenced. The men worked non stop and completed mid-afternoon. The surrounds of doors and windows were repaired where necessary. The old fittings were removed and all the rubbish swept up and cleared away.
We were shown how the locks and the internal blinds worked.
Overall we are very satisfied with the new doors and windows and the workmanship of the fitters. We would certainly recommend Ruislip Windows and Doors Ltd to anyone.

Our 39 Year Tried & Trusted Process

We’ve been fitting windows, doors, and conservatories for nearly four decades. Our proven process delivers outstanding results time after time, giving customers excellent installations on every project.

Book an Appointment

Schedule your appointment easily by email or phone. Our friendly team will confirm your details and arrange a convenient time for your free quote.

Free Quote

One of our experts will visit your home to measure up and discuss your options. You’ll then receive a clear, no-obligation quotation.

Confirm Date

Once you’re happy to go ahead, we’ll schedule your installation for a date that suits you best, keeping you informed every step of the way.

Job Complete

Our experienced fitters complete every job to the highest standard, leaving your home tidy and your new windows, doors, or conservatory ready to enjoy.