Sashwise Limited Logo

Sashwise Limited

+Approved member since 2013

Services and skills

  • Windows / Doors / Conservatories

    28 skills

    Bay Windows Installation

    Bay Windows Repair

    Bifold Doors Installation

    Conservatory Installation

    Double Glazing Installation

    Draught Proofing

    Exterior Doors Installation

    French Doors Installation

    French Doors Repair

    Frosted Windows

    Loft Windows Installation

    Patio Doors Installation

    Timber / Wooden Doors Installation

    Timber / Wooden Doors Repair

    Timber / Wooden Windows Repair

    Triple Glazing Installation

    Triple Glazing Repair

    Windows and Doors

    Window Fitters

    Double Glazing Repair

    Stained Glass

    Wooden Sash Windows Installation

    Wooden Sash Windows Repair

    Timber / Wooden Windows Installation

    Interior Window Shutter Fitters

    Window Shutter Fitters

    Window Shutters

    Window Shutter Suppliers

  • Services

    3 services

    • Domestic Work
    • Commercial Work
    • Free Estimates


Customer reviews

Overall ratingin last 12 months

9.98Write a review
  • Workmanship10 out of 10
  • Tidiness9.91 out of 10
  • Reliability10 out of 10
  • Courtesy10 out of 10
Write a review

339 Total Reviews

The reviews below represent customers' views and not the views of Checkatrade

  • New windows on 1st and 2nd floor

    10Verified Review

    Sashwise were fantastic. They very clearly explained the options before quoting and gave clear timelines ahead of installation. The team on site were brilliant - very courteous and with minimal mess given the job. Our new windows look fantastic and make a huge difference to the warmth and appearance of our house. Would highly recommend.

    Location: SW15
  • New double glazed sashes, front upstairs and bay, plus bathroom

    10Verified Review

    Jay and Zach did an excellent job. My house feels pleasanter to live in and looks much improved. Very good communication throughout, I would use again

    Location: KT1
  • Window replacement

    10Verified Review

    This is the second time I have used Sashwise. Dan and team do a great job, they are a pleasure to deal with.

    Location: SW18
  • New Windows

    10Verified Review

    Sashwise were absolutely fabulous. They visited us quickly upon our first query, sent a quote very promptly and all work was undertaken in the time frame set out. Melissa and Dan were very nice to deal with and the fitting team - Tim Jay and Zach - were friendly and tidy. The finish is beautiful, and for a reasonable price too. Thank you!

    Location: TW11
  • Replacement of single glazed sash windows with double glazed sash windows

    10Verified Review

    Sashwise did a marvellous job of replacing our badly fitting Victorian single glazed sash windows with identical double glazed sash windows. The new ones are stunning and make a huge difference. We went for conservation/slimline windows which look very in keeping with our early Victorian house - you can't tell they are double glazed as they are so slim. They suggested keeping the original boxes so that saved money. The team were very neat, tidy, quiet and considerate, even working around our 14 month old baby's nap times! We will be using them again for the rest of our windows in due course.

    Location: TW10
  • Sash window replacement

    10Verified Review

    Sashwise installers Jay and Zach did an excellent job with our new sash windows. They were courteous, friendly, professional and very tidy. I would highly recommend.

    Location: KT2

Company profile

  • OwnerMr Dan Johnston
  • Member Since2013
  • Public Liability InsuranceSelf-Certified
  • AccreditationsChecked
  • AddressNot Yet Checked
  • IdentityNot Yet Checked
  • Checkatrade T&C'sSigned
  • VATYes: 980818781
  • Company typeLtd Company

Company info

Restore your sash windows - discover a warmer, quieter and more secure home

  • over 10 years’ experience
  • a team of highly skilled craftsmen
  • exceptional level of 121 service 
  • competitively priced
  • best quality materials
  • extreme care in your home

SashWise is a family run business based in Twickenham and specialises in the repair, restoration and replacement of wooden sash windows.   Dan (the owner), and his team of highly skilled craftsmen are passionate about delivering a high level of service at a competitive price.  We only use the best quality materials and take extreme care in our clients’ homes. We work in Teddington, Twickenham, Richmond, Hampton, Kew, Barnes, Kingston, Surbiton, Ealing and all surrounding areas.

Free site survey and competitive quotationWe pride ourselves on ensuring we exceed our clients’ expectations.   We provide a free on site survey and quotation which is tailored to your individual needs. Servicing and draft proofing – save heat, eliminate drafts and improve sound-proofingBy using a specialist draught-proofing system we will get your sash windows opening and closing smoothly again and eliminate draughts & rattles.  Sash cords are replaced with high quality waxed cotton cord and the windows re-weighted and re-balanced.  Any rot is repaired on site.Full restoration – restoring the integral beauty of your period homeWooden sash windows are key to the architectural heritage of any period home.  Our team of skilled craftsmen are passionate about returning these historic features to their original beauty through our full restoration service.   At our local workshop, the sashes are taken back to wood and all rot is repaired.  The windows are then fully serviced (as detailed above) and painted throughout using a special high quality micro-porous paint on the exterior and an eggshell finish on the interior.The boxes are prepared, sanded, primed and an undercoat applied.  The sills are also finished with a gloss and eggshell coat.Double glazed hardwood sashes – retain heat and reduce noise levelsIf you are looking to improve the thermal performance of your sash windows and reduce noise pollution then we can make double-glazed hardwood timber sashes to fit within your original box sash frame. This is a more cost effective and less disruptive process than replacing the whole of your sash window. If you are looking to re-instate timber sash windows, if you need a new window in an extension or if your current sash boxes need replacing and they are beyond repair, we can also supply and fit new hardwood sash boxes complete with double glazed sashes that replicate the originals.We take great care to replicate the style and detail of your existing sashes so that they maintain the traditional character of your property. We work throughout the boroughs of Richmond, Twickenham, Kingston, Chiswick, Ealing, Wandsworth and all neighbouring areas.

Please call us today to discuss your individual requirements.

Plantation shutters

We also design and install plantation shutters - please see our sister company - Shutterwise for more information:website:

Please click here for our Facebook 

Contact details

Accreditations and awards