What our Customers are Saying About Us


  • "I used Envirosash to make 6 new sashes as well as an entirely new sash window. The windows are of the highest quality, beautifully made and draught-proofed. They keep the flat much warmer and we've already noticed how much quieter it is. Alex was competitive on price even taking into account the quality materials that he uses. I wouldn't hestitate to recommend Envirosash on the basis of their craftsmanship, reliability and general ease with which they performed the job."

    Natasha, Maida Vale
  • "Alex was a pleasure to deal with and the job was done on time and as expected. His workforce did a high quality job and were always polite, helpful and attentive. They also made sure to clean up at the end of each day. We had most of the windows in the house replaced and it has made a real difference. Happy to recommend."

    Mervyn, Crouch End
  • "Excellent work, high quality finished product, good use of technology to provide itemised quotes. We live in a conservation area so it was essential to get slim double glazing including very thin glazing bars, while retaining as much of the original windows in order to maintain the appropriate aesthetic. Alex and team were able to deliver this at approximately half the cost of replacing the windows over a four day refurbishment. The advantage of such a refurbishment is that the original, resinous hardwood frames are retained."

    Robert, East Molesey
  • "We have had Envirosash in twice now, 1st for bay windows and a french door, 2nd time for 2x sash windows. They have done a fantastic job both times, and the windows look like new (the 2nd time was particularly good as he was extremely tidy, & hoovered every day before he left!) The lead times are quite long, but it is worth the wait as you'll end up with a better product, for a better price (compared to all the other companies I had in to quote for replacing the full window). Highly recommend!"

    Lucy & Tim, Finsbury Park
  • "Envirosash did a very good job replacing our very tall windows including small amounts of carpentry where there had been some rotting. Pleasant and skilled workforce." Rebecca Brown.

    Rebecca Brown
  • "We are very happy with the job Envirosash completed recently. All our sash windows were draught proofed and double glazing fitted into some of the existing sashes and some into new sashes. We also had our huge French windows double glazed well too. Liam and John worked tirelessly and any problems were thoughtfully solved. The house was left clean and tidy at the end of every day. The house is now toasty warm. Neighbours have been so impressed at the finished job that they have booked Envirosash to double glaze the sash windows in their house." Jenny, Crouch End.

    Jenny, Crouch End
  • "Had some replacement slim double glazed sashes fitted recently. Good craftsmanship and thorough job. Cleaned up every evening. Good to have a quote from someone who actually understands the work to be done, rather than from someone who is just a salesman. Would definitely recommend." Sarah Drake, Gravesend.

    Sarah, Gravesend
  • "Envirosash did a very good job replacing our very tall windows including small amounts of carpentry where there had been some rotting. Pleasant and skilled workforce." Rebecca Brown

    Rebecca Brown, Oxford
  • "Would highly recommend Envirosash, they did a fantastic job replacing the glazing in our French doors and casement windows. Very professional and left the house and garden immaculate every evening after finishing work. Can already feel the house is so much warmer and energy efficient since the new double glazing was installed." Mark Macmillan, Deal, Kent.

    Mark, Kent
  • "I would definitely recommend Envirosash; I have just had our 5 period sash windows redone by the guys and they did a brilliant job! Always punctual and happy to go the extra mile, the finished job surpassed my expectations. I would definitely hire them again in the future." Francesca Gioia, Kentish Town, London.

    Francesca, Kentish Town
  • "The Envirosash team, Alex, Liam and John were polite, friendly, helpful and tidy and left me with seven beautiful windows. The old ones were in a very poor state, some suffering from wet rot. As I live in a 5th floor flat the frames were repaired and restored in situ but new double glazed sashes were inserted – am now looking forward to a draft free winter. I would definitely recommend Envirosash." Carol Eden, Marylebone, London.

    Carol, Marylebone
  • "Envirosash skilfully fitted our all original sash windows with slimlight double glazing and draft proofed the house. Unlike a number of alternative competitors, they diligently and skilfully maintained all the original sash glazing bars and all the character of the property. No stuck on ‘glazing bars’ or corners cut. Fantastic result and reasonably priced – highly recommended" Kevin

    Kevin, Wandstead
  • "Our windows were in quite a bad state before, but Alex and his team at Envirosash have managed to restore them to their former glory. Now all in fully working order, our sash windows have a new lease of life. Sound and insulation improvements noticeable. Thank you, Gary & Rozy Ingram"

    Gary & Rozy, Wandstead
  • "The guys from Envirosash did a fantastic job double glazing our casement windows very professional left the house immaculate every evening would highly recommend them.Was definitely worth the wait." Andrea

    Andrea, South London
  • "Alex and Simon did a wonderful job replacing our large living room sash window in our Georgian cottage in Deal. Simon, the installer, was a pleasure to work with. We hope to use them again for other windows in the house. Highly recommended!" Peter L. Deal, Kent

    Peter L, Deal, Kent
  • "I live in Tufnell Park. Envirosash fitted slim double glazing into our old window frames with draft proofing. Alex was really helpful and I would definitely recommend!" Rosie

    Rosie, Tufnell Park
  • "Ron and the guys did a great job. We had a mix of refurbs, replacement sashes with double glazing and slim double glazing in our existing sashes. We are really pleased with the results of all of them. The sound reduction has been really good and the place is warmer too. Excellent workmanship." Louise, London

    Louise, London
  • "We were very pleased with the work Envirosash did replacing the glass in our wooden sash windows with double glazed panes. Scott came on time every day, and never left any mess behind. He did a great job and I have already recommended Envirosash to a friend!" Wendy Weiss, Oxfordshire.

    Wendy Weiss, Oxford
  • "Adam,Sukh and Ron have left the house beautifully clean and tidy. They have done an excellent job with the windows and I have really appreciated just leaving them to it" Sarah, Dulwich.

    Sarah, Dulwich
  • Envirosash replaced 9 sash windows at our victorian house. The original boxes were utilised, with new sashes and weights fitted. They are beautifully made and have reduced the heat loss and noise pollution significantly. The work was completed in a timely fashion, on budget and Alex and his team were very pleasant to deal with. Mr Fisher, Kent.

    Mr Fisher, Hythe, Kent
  • "I have used Envirosash twice for refurbishment of my Victorian sash windows. They have done an excellent job on both occasions and are very neat and tidy workers." Susan,.

    Susan, Stoke Newington
  • "Alex and his team refurbished and added draft proofing to three of our period sash windows.  They also installed Slimlite double glazing into our existing frames. They were conscientious, efficient and clean and delivered to a high standard. I would highly recommend them for similar jobs." Tom.

    Tom, Stoke Newington
  • "Last year Envirosash installed top quality double glazed sash windows throughout my Victorian house in Stoke Newington, London. Where possible, the existing sashes were used, restored, and fitted with the double glazed units, and, elsewhere, excellent new sashes were made to measure (in two cases with curved tops). The result has been a much warmer and quieter house, and some of the most discrete double glazing I have ever seen. Not only was the standard of work high, but my wife and I were very happy with the friendliness and politeness of Alex and his team. I would not hesitate to recommend this company to anyone wishing to install double glazing in a period house." Jonathan, Stoke Newington.

    Jonathan, Stoke Newington.
  • "We were delighted with the excellent work enviroshash has undertaken for us. Their craftsmen are highly skilled and efficient. They are also reliable and very peasant to deal with."  Tim

    Tim Sheehey, Oxford
  • "Envirosash made an excellent job of double glazing our original windows, particularly the large Edwardian bay window which has been painstakingly renovated in keeping with the period. The team were invariably pleasant and hard working. Good job!" Renee

    Renee, Oxford
  • "We are very happy with the quality of our transformed bedroom sash window, thanks to Environsash professional work. The result more than meets our expectations. I have also appreciated Envirosash flexibility (fitting in some extras at short notice) and sound advice."

    Fabienne Bonzon, Hackney
  • "Having researched all the options available to refurbish our sash windows we are very pleased that we decided to go with Envirosash. Not only are the team hard working and professional at all times but the end result is far better than we expected. Our creaky old windows now slide smoothly and condensation has completely disappeared. We are so pleased we didn’t decide to replace them with new. Many thanks Jabin and Ollie."  

    Heather, Oxford
  • "Our 100-year old windows were rattling and draughty. We had some 14 windows overhauled and refitted with the slimline double glazing units - 8 sash windows and 6 casement windows. Jabin's crew were very professional, civil and competent. Our heating bill went down by a third in the winter following the installation. Am happy to recommend." Colin W, Oxford

    Colin W, Oxford
  • "Alex was a good listener and found exactly the right solution for my Sash windows . The product is good , and I look forward to a condensation free winter" . Angela Eden

    Angela, Kentish Town
  • “They did the work quickly and neatly. The house is more consistently warm as we hoped and there is no sign so far of condensation on the windows which used to be such a problem on chilly mornings. They really improved the fit of the windows as well with all the new weather stripping and piecing in the gaps that used to leak so much cold air.”  

    Pamela, North London
  • "We can thoroughly recommend Alex and his team - they recently replaced five of our victorian sash windows and we are really pleased with the results. The windows look great and work perfectly and the rooms were left spotless on completion. We couldn't have asked for a more hard-working, professional and good humoured team - many thanks to you all!" Pat & Al, Deal

    Patrick & Aleca, Deal, Kent
  • "I have just had 15 windows fitted by Alex and the team - a big job, and one done to an extremely high standard. The glazing units are so slim you can hardly see them. The sashes look as elegant as they did originally, but they open and close far better and it has already made a big impact on noise and warmth. The team who did the work were also great. It's a big commitment to have people in your house for 3-4 weeks - particularly with my 4 month old baby as well! - but they were polite, considerate and tidy. I would very happily use envirosash again in future, I've just run out of windows for them to work on!"

    Charli, Clapham
  • “ I am very happy with quality and workmanship of the windows installed by Envirosash” Jeff – Clapham

    Jeff, Clapham
  • 'Envirosash recently fitted slimlite double glazing into the sashes of our Georgian house in London. They've completely transformed how the rooms feel inside; much warmer and quieter. From the street outside they look fantastic and from the inside they completely fit in the period features - you wouldn't know they are double glazed. Thanks Alex and team.

    Jeremy Poole
  • I am very pleased with the work done both with regard to the quality of the work itself and careful and agreeable behaviour of the workmen. I would recommend the company to anyone wanting draught-proofing and double glazing.

    Mrs Beryl Sedgwick
  • Dear Alex, I write to let you know how delighted we are with our refurbished windows. Having recently bought an Arts & Crafts house with many original features we were very reluctant to contemplate replacement windows but could not have lived with the windows as they were. Your approach seemed to offer an ideal solution. The combination of renovation & repair to existing timbers, replacement Slimlite double glazing & draft proofing has left us with windows that look as close to original as we could have hoped for but with clear improvements to sound proofing, draughts & condensation. We also did not have the complications of masonry repairs & internal decoration associated with replacement windows. So we are very pleased with the outcome & would highly recommend others homeowners to consider this system over replacement- particularly were they are keen to retain as much of the original integrity of the house as possible. Many thanks. Kind regards John Sallis Chandler Surbiton, Surrey

    John, Surrey
  • Alex and his team are straightforward and helpful; they make the process of window replacement as painless as possible. When in place the new double glazed windows look good, they open and close smoothly and keep the room just that little bit warmer”. Claire Pike, London.

    Mrs Pike
  • I can strongly recommend Envirosash. Alex and his experienced team manufacture new sashes that are indistinguishable from the originals and they spare absolutely no effort in restoring even the most warped and defective 150-year-old boxes, thus saving the cost and dirt of total replacement. The double-glazing units are so thin you hardly notice them, and the sashes glide up and down effortlessly despite the weight of the glass. Envirosash’s prices are reasonable and although window renewal is a messy process there’s no problem as the team cleans up meticulously at the end of every working day. We’re looking forward to a much cosier winter this year.

    Joe, E8
  • We had four windows replaced with Envirosash windows in our Victorian terrace house and are extremely pleased with finish and result. The windows look beautiful and have instantly made a huge difference in terms of reducing street noise within the house. Envirosash are a very professional, hardworking and friendly team to work with. Alex is really knowledgeable and worked very hard to make sure all our queries were dealt with quickly throughout the whole process. Daniel fitted the windows to a exceptionally high standard and was a pleasure to have working in our house (which says a lot when you’re having your windows replaced and are looking after a small toddler at home!). We wouldn’t hesitate to recommend them.

    Lizzie Thorne, Hackney
  • How to upgrade my draughty Edwardian sash windows in a conservation area run by an unresponsive council planning department in London was turning into a nightmare. But the slim double glazing and draught proof solution that Envirosash offered and implemented was absolutely perfect, economic and enabled me to keep the beautiful wooden frames and sills. This small company of craftsmen has transformed my apartment into a cosy and quiet place.

    Rachel Stabb, North London
  • I am very happy to recommend Envirosash they have renovated four Of our sash windows and fully replaced another. The standard of work and general service was outstanding also very competitive prices highly recommended.

    Alec, Deal
  • Envirosash double glazed and draught proofed our existing Victorian sash windows. This has provided significant thermal and acoustic improvement without compromising the architectural character of our home. The work was carried out diligently, with care and minimal disruption. We wouldn’t hesitate to recommend them.

    David, North Oxford
  • Living in a period country house with large windows, in an area of outstanding natural beauty, we needed to install double glazing within the existing wooden frames avoiding any plastic and unsightly thick double glazing. Envirosash came up with the perfect solution. From the initial survey to the completion of the job, we felt confident that we had chosen not just another double glazing company but one with consideration for traditional joinery skills and sensitivities towards period and heritage. The double glazing has been superbly installed and is unnoticeable in appearance. What is immediately noticeable is the temperature.

    Mike D, Saltwood, Kent
  • I can highly recommend Envirosash – their product; their service and people. We are really pleased with our new windows which have dramatically cut down on draughts but which also enabled us to keep the original frames. The team, both admin and craftsmen, were friendly, professional and altogether a pleasure to deal with.

    Jenna,Muswell Hill, London
  • I was instantly impressed with Envirosash’s knowledge of period sash windows, what was possible with their renewal and how best to achieve the double glazing we required. I had received several other quotes for the windows all of which insisted that I would need to have the sashes replaced. Envirosash were able to fit double glazed units to our existing windows and we are extremely pleased with the results, both in terms of looks and heat retention.

    Graig, North London
  • My father and I were extremely satisfied with the professionalism, level of service, value for money, flexibility and quality of craftsmanship that was provided by envirosash. I would recommend to anyone. Quality profession tradesman like those at Envirosash are very rare and we were very lucky to find them.

    Richie, Highgate
  • I am very pleased with my new windows: they look great. My original Victorian sash windows have been beautifully restored and it is very difficult to tell that they are double-glazed without close inspection. They now run smoothly and are free from drafts. The Oxford Envirosash team were courteous and helpful throughout.

    Katy, Oxford
  • I would like thank Envirosash installing my new slimlite glazing on our original wood windows. During the days of the work they were very professional, clean and went to great effort to get the job done quickly to reduce inconvenience. In addition they detected problems with the windows and repaired them on the spot. This was something I did not expect and now we have free opening and closing windows instead of stiff ones. I would gladly recommend this company to anyone.

    Victor Matty
  • The Envirosash team were brilliant, organised, prompt and value for money. They left our home clean, tidy and most of all warmer than they found it.

    Mark & Dianna, Deal Kent
  • Envirosash worked hard in difficult conditions: it snowed all week! They were very approachable and friendly, kept us informed at all times and explained clearly what needed to be done. The work was carried out professionally and we have been very satisfied with the results.

    James & Susanna, Whitstable
  • I have recently had 4 new double-glazed sash windows replicated in traditional Victorian style with all details installed in my cottage by Envirosash. The windows fit in perfectly with the character of the cottage and look as if they were part of the original installation. In terms of heating efficiency the change from single-glazed panes to double-glazed has made an immediate and marked difference. Alex was both efficient and courteous throughout our dealings and I would not hesitate to recommend his services should anyone decide to update their period property.

    Mrs C.Turner, London
  • As a testament I would like to say from start to finish it was a pleasure in dealing with you, your workmanship was excellent, and from your start time usually around 8am until finish around 5pm and beyond, which in our experience is totally different to other tradesmen turning up and 9.30 – 10, and finishing around 3pm, this certainly was a pleasant surprise for us. The window refurbishment and draft proofing you installed on our house I would recommend to anyone as the warmth and noise reduction are noticeable immediately!! No more rattling noisy windows and the draft doesn’t come in reducing the amount of time we have the heating on, again immediately. Again many thanks it really was a complete pleasure dealing with you.

    Mr & Mrs Todd, Dover
  • I had most of the sash windows in my Edwardian house in Oxford refurbished with draft-proofing and new slim double-glazed panels by Envirosash. I was completely happy with all aspects of the job. The quote was accurate and there were no hidden extras. The job was done pretty much as scheduled (weather interruptions caused minor delays) and the disruption to the house was minimal. Jabin and Alex were a delight to have around and the quality of craftsmanship was high. The house is warmer and more comfortable this winter.

    Mrs W.Carlin, Oxford
  • Envirosash were friendly, quick and reasonable. Very impressed with everything they’ve done. It has made a massive difference to the temperature of the house. I would recommend these guys to anyone.

    Mr Bradshaw, Oxford
  • I was very pleased with the work carried out by Envirosash on six wooden sash windows. The end result is very good and has reduced draughts and external noise as well as dramatically improving the insulation. Throughout the initial planning and then the actual work Alex took time to explain what needed to be done and when changes needed to be made, and continued to seek my agreement before going ahead. He also took pains to ensure dust and dirt was kept to a minimum as well as cleaning up each day before leaving the site. I am very happy to recommend Envirosash to other customers who maybe considering this type of renovation.

    Mr T. O’Leary, Folkstone
  • The house is warmer. Traffic noise has gone. Money well spent, they did a very good job!

    Mr S. Mcphilemy, Oxford
  • From the initial survey to the completion of the job, we felt confident that we had chosen not just another double glazing company but one with consideration for traditional joinery skills and sensitivities towards period and heritage. The double glazing has been superbly installed and is unnoticeable in appearance. What is immediately noticeable is the temperature.

    Mike D Saltwood – Kent
  • Envirosash doubleglazed and draught proofed our existing sash windows. This has provided significant thermal and acoustic improvement without compromising the architectural character of our home.

    David – North Oxford
  • Other quotes I’d received said I would need completely new windows where Jabin said they could reuse the original frames and sashes which really got the cost down. I am very happy with their work and now the warmth of the room is amazing.

    Mrs L. Stable – London
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