A Aujaili – Islington, N19Good response time, good work, professional office!Read more.G Morris – Wood Green, N22Excellent cleanliness, quality window and very good customer serviceRead more.A Heinson – Leyton, E5The product is very good!Read more.J Castle – Westminster, W2“Core Sash Windows put two double sash windows into my flat and the difference is amazing. The look is excellentRead more.C Field – Southwark, SE17"Great service from start to finish. Helpful and informative staff. The workmen who carried out the work were fantastic- notRead more.L&R O’Neill – Woodford, E18"Core Sash Windows carried out the replacement of our ground floor bay window some time ago and not only wereRead more.S Cartwright – Lambeth, SE5"The windows are of an excellent quality and the workmanship is amazing. My neighbour who suggested you after seeing yourRead more.R Wood – Ealing, W4"Excellent workmanship with reliable workers. They cleaned up every day and did everything they could to minimize disruption. The windowsRead more.R Townsend – Crouch End, N8"My new windows are great, no more draughts and blessed quiet! All the team were great, from the surveyors toRead more.T&J Hare – Islington, N7"Core has been great, our windows and door are perfect, the installation team were very professional and did a greatRead more.E White – Hackney, E5"I had two french doors replaced. Right from the initial visit I felt Core was a company I could trust.Read more.J Baker – Penge, SE20"Very professional service throughout from Core Sash Windows. The quality of the product is excellent and the on-site craftsmanship wasRead more.S Singh – Powerscroft Road, E5"I cannot eulogise enough about how fantastic Core Sash Windows are. Sean Mac Anbhaird and his team are consummate professionalsRead more.G Bulcraig – Hackney, N16"Good, on time, nice & tidy"Read more.J Aldenton – Chatsworth Road, E5"Competent professional job"Read more.T Rubenstein – Hackney, E9"Pleasant and professional staff"Read more.M&M Newlyn – Camden, NW3"We are very happy with our new windows. Your men are punctual, hard working with attention to detail, polite andRead more.N Al-Aujaili – Islington, N19"Good workmanship and threw in some extra (minor) building work (knocking down patio door step) for free. A little priceyRead more.P Willis – Islington, N1"This was a large job, all our windows being replaced or draft-proofed in a conservation area. It took slightly longerRead more.A Clare – Forest Hill, SE23"I was really pleased with the workmanship and professionalism of the men on site. They were punctual, diligent and workedRead more.R Butterworth – Tower Hamlets, E3"Excellent work with a tricky installation and a great finish. The fitters were clean, tidy and very professional."Read more.A Polson – Tower Hamlets, E3"I just wanted to say a big thank you for replacing our terrible 70s style plastic windows with authentic sashRead more.D Gee – Richmond, SW14"Core did a fantastic job on my new front window - they matched the original Edwardian design exactly and weRead more.L Woodhouse – Gaywood Road, E17"The quality of the work was excellent, as was the communications from the company. Everyone involved - the first assessment,Read more.J Titchener – Richmond, SW14Services Provided: Double Glazed Sash Replacement and Draught-ProofingRead more.C De Cruz – Haberdasher Street, N1"As far as the three (windows) you have already put in – well I am in love with them!! FirstRead more.A Ward – Hampstead, NW6“We had our front sash bay windows replaced, and back windows draught-proofed. The team was extremely professional, turned up onRead more.J Hope – Islington, N7"I just wanted to say thank you. The doors/windows look great. Your team was very efficient and really tidied theRead more.S Landels – Wanstead, E11“Such a relief to deal with a professional and friendly company with a quality product. Given honest and clear adviceRead more.J Muller – Camden, NW6“I am very pleased with my sash windows from Core Sash windows. From customer service, to the product to theRead more.T&J Williams – Tower Hamlets, E17“Excellent. Clear advice, no pressure and an excellent product! Great fitter – friendly and helpful.”Read more.J Voss – Lambeth, SW2“We are very pleased with our new windows – it’s the coldest June ever so we had to put onRead more.T Jones – Middle Lane, N8“We’ve hired Core Sash Windows on two occasions to upgrade old sash windows at our Victorian property in Hackney. WeRead more.K Harrison – Hackney, N1“Thanks guys for the great job you did last week. Our double glazed windows in the bedrooms look amazing, itRead more.A Walpole – Islington, North London“We were very happy with the installation. A prompt, friendly and efficient service and our new windows look great.”Read more.I Foster – Muswell Hill, N10“The windows are now finished and we are so happy with them – they look absolutely beautiful and we’ve noticedRead more.C Marshall – Beck Road, E8“We’ve now got windows to be proud of – thank you. I’ve been really impressed not just by the qualityRead more.P Parkinson – Allen Road, N16“Having suffered many times over the years from unreliable, shoddy and expensive buildings maintenance workmanship in London, Sean and DanRead more.T Greenbank – Woodlea Road, N16“Our sash windows were old and very knackered (e.g. painted shut, weights missing or broken etc.). We didn’t want toRead more.G Soklakov – Antill Road, E3“We are really happy with the work done by Core Sash Windows. The team was friendly and professional and didRead more.A Gough – Hackney, E8“We are thrilled with our new windows. Immediately we had a quieter, more solid house and they have given theRead more.N Phillips – Tetherdown, N10“Core Sash Windows conducted a complete double glazed refit of our period windows to our family home, and we couldRead more.R Pendry – Stoke Newington, N16“We were very happy with the work completed by the Core Sash Windows team. They were polite, punctual and hard-working,Read more.F Byrne – Raleigh Road, N8“You said my unloved and neglected original sash windows would look like new after you’d finished with them and theyRead more.M Massey – Islington, N4“I love my new windows. My house is suddenly much quieter and warmer which is brilliant. Having any workmen inRead more.D Tinley – Camden, NW5“We found Core Sash Windows to be efficient and reliable. We had five old windows replaced with new double glazedRead more.R Lockett – Camden, NW5“Very impressed by the Core Sash operation. Staff efficient, competent courteous and hard working. Arrived on time and cleaned upRead more.G Grieve – The Chine, N10“We had recently our sash windows replaced with new doubled-glazed ones and draught proofed. The speed and tidiness of CoreRead more.H Snowdon – Dalston, E8“I never expected – only hoped for – the level of service I received from Core Sash Windows. The adminRead more.Y Yang – Kensington, W14“I am pleased to write this letter of recommendation for Core Sash Windows. I have used this company’s service forRead more.B Schmid – Hoxton, N7“From the first contact working out the quotes and throughout the job, Core provides the perfect service for sash windows.Read more.T Steele – Islington, N5“We recently used Core Sash Windows for new double glazed sash windows in our Victorian flat in Stoke Newington. OurRead more.D Russell – Highbury, N5“We used Core Sash Windows for a complete refurb of all the windows of our Victorian house in High bury.Read more.O&A Parrish – Bow, E3“Left confused about what to do after receiving conflicting advice and quotes for new sash windows from a number ofRead more.R Harding – Wandsworth, SW18“Core refurbished my flat back in 2009 and did wonders installing three new double glazed sashes, two new windows forRead more.J Burgess – Muswell Hill, N10“Sean, Dan and the team were punctual, friendly, and hardworking and always kept me up-to-date with the work and howRead more.L Thompson – Haggerston, N1“Sean, Dan, George and the team did an excellent job in restoring and draught-proofing four ill-fitting windows, some of whichRead more.K Marles – Holloway, N19“Thanks so much for the draught proofing work on our windows. The work was done with the absolute minimum ofRead more.R Boylan – Crouch End, N8“It’s incredible! I can’t believe the difference it’s made. I live on a busy bus route which meant noisy andRead more.A Jose – Finsbury, EC1“I was thoroughly impressed with everyone I dealt with at Core Sash Windows. Not only were the windows substantially improved,Read more.William Gaze Ltd – Kensington and Chelsea, W11“Thank you Core Sash Windows, your team headed up by Dan were absolutely brilliant. Always on time, very professional andRead more.S Keeble – Finsbury Park Road, N4“I have no doubts or hesitation in recommending Core Sash Windows to everyone looking for craftsmen to renovate their windows.Read more.Martin L – Harringey, N4“I used Sean and his team to install draught proofing around our old sash and casement windows. The work wasRead more.P&T – Brent, NW10“After contacting Core Sash Windows, they responded efficiently – Sean and Daniel came round within a week and provided usRead more.L – South Bank, SE1“Core Sash Windows did a very professional job replacing my single glazed windows with double glazed ones, at a veryRead more.S Shipman – Finsbury Park, N4“I just wanted to thank you and Sean for your work over the last couple of months – the internalRead more.E Jones – Kensington and Chelsea, W8“I was pleasantly surprised by the level of tidiness when work ended each evening. The workmen were friendly and politeRead more.D Baker – Hackney, East London“Sean and Dan’s team provided a service beyond expectation – reliable, punctual, considerate and friendly. As for the standard ofRead more.