sashwise logo
sash window kew


Expert sash window repair and replacement

SashWise is a local, family-run sash window installation and restoration company. We have worked in Sunbury since 2006 and are very familiar with the local architecture and maintaining the character of the homes in this area. We would love to hear from you if you live in Sunbury and are interested in the installation or restoration of new hardwood sash windows or refurbishment/restoration of existing sash windows.

SashWise is owned by Dan Johnston, an experienced professional in the window industry, with extensive knowledge of the local area. His team of installers, also local to the area, have years of experience in the production, renovation and installation of new and refurbished sashes.

If you are also interested in window coverings, our sister company ShutterWise offer a comprehensive installation service for shutters in Sunbury.

Reasons to choose SashWise

Hardwood double glazed sashes
  • Our focus is in providing the utmost level of service and value to our customers.
  • As a small, family-run local business, we take great pride in delivering superior craftsmanship. 
  • We specialise in the repair, replacement, and restoration of timber sash windows.
  • Our team of highly skilled installers employ the most advanced draught-proofing system available.
  • We utilise materials of the highest quality to ensure lasting results.
  • Your home is treated with the utmost care from the moment we arrive until we leave – we use dust sheets to protect your furniture, and we meticulously remove all debris, dust, and old materials before we depart.
  • With over 300 5-star reviews on Checkatrade, our reputation speaks for itself. Don’t just take our word for it; see our latest reviews here.

Sash window services

Sash window draught proofing

Servicing and draught-proofing

If your sash windows have broken cords or are stiff or jammed shut then this service will restore them to their original smooth working order.

Georgian sash window

Sash window repair and restoration

We completely and sympathetically restore your windows, so they will look like new without losing any of their original features.

Hardwood double glazed sash windows

New hardwood double glazing

If you do not require complete window replacement we can make new double glazed timber sashes to fit your original box sash frames.

Victorian sash window

New hardwood sash boxes

We can supply and fit new hardwood sash boxes complete with double glazed sashes that exactly replicate your original windows.

Guaranteed Service

At SashWise, we guarantee a personal, comprehensive, and cost-effective service. Our commitment is to deliver the highest quality, all at a competitive price.  Our mission is to acknowledge the significance of timber sash windows in preserving our architectural heritage. Our dedication is centred around renovating your property and adding value to your home.

Backed by a team of highly skilled craftsmen with over a decade of expertise, we specialise in the repair and restoration of wooden sash windows within Victorian and Georgian houses across West London.

We are committed to providing a personal, comprehensive, and cost-effective service. Choose SashWise for a renovation experience that exceeds your expectations

Featured image photo credit: © steve (cc-by-sa/2.0)

SashWise Van

Sash window projects in Sunbury

For free no obligation advice, please call us on 0208 977 4627 or complete the form below:

Contact us