Sash Doctor
London
Checkatrade member since December 201310
Public liability insurance is unverified
Services
- Wooden Sash Windows Installation
- Timber / Wooden Windows Installation
- Bay Windows Installation
- Draught Proofing
- Timber / Wooden Windows Repair
- Bay Windows Repair
- Wooden Sash Windows Repair
Customer Reviews
Write a review9.9 /10
Based on 7 reviews over the past 12 months
Quality of work
10
Reliability
10
Communication
9.71
Reviews (136)
10 Great workmanship to an excellent standard, completed quickly and efficiently
Posted 20 January
Jason and James have just been back to re-furbish and draught-proof our back sash windows. Great job as usual. They worked constantly and so well together so that the work was done to an excellent standard but completed quickly and efficiently. Those rooms are so much warmer now. It’s like a different house!! We’re so pleased we’ve booked them to return in the Spring to do our sash windows at the front.Verified reviewerJob location: E1710 Exceptional standard of craftsmanship and expertise
Posted 19 December 2025
Jason did an exceptional job repairing our original wooden sash boxes and cills. He responded immediately to our request and we were lucky as he was able to fit in a repair the next week. He is polite, helpful, works expertly and efficiently leaving no mess and removing the rubbish. A true professional and extremely good value. We’re booking him to re-furnish and draught-proof our remaining wooden sash windows next year.Verified reviewerJob location: E17- LLola R
10 Window refurbishment and draft proof sealing system installation
Posted 29 October 2025
Jason and team did an amazing jobs repairing our original timber windows. Everything was done quickly, from initial contact, to quote to finalising the job. Extremely happy with our results, would 100% recommend!Verified reviewerJob location: N13 10 Very Professional Service
Posted 15 October 2025
Job location: N8Jason is very professional and gives a first class service. This is the second time we have used Sash Doctor. We used him to draft proof our sash windows on our last house and now on our new house. Will always recommend to friends and family. House feels so much warmer and less noise from the outside.10 Repair of sash windows
Posted 05 June 2025
Jason has worked wonders repairing my day windows and restoring them. He was very knowledgable, has a high quality standard and was extremely competitive with this quote. Highly recommended.Verified reviewerJob location: NW29.33 Replace 2x sash window sills
Posted 04 June 2025
Good experience with Jason and his colleague. They did a good job on site and explained/demonstrated the work as they went along. He explained the after-care required as well, recommending which products to use. The new sills appear to be well fitted and of good quality.Verified reviewerJob location: W12
Company Info
Owner
Mr Jason Vanderhyde
Sole Trader
13 years on Checkatrade
VAT Registered
No
Based in London, we are the sash window refurbishment and draught proofing specialists.
Lower your heating bills with our draught proof sealing system, guaranteed to stop all draughts and rattles.
Speak to us today for a test window.
Our services include the following:
- Sliding wooden sash windows
- Draught proofing
- Sash cords repair
- Relieving jammed sashes
- Treatment to decaying timber
- Full renovation service
- Security locks and stops
- Painting service provided
Sash Doctor uses a method for reducing draughts with discretely positioned seals that conserve energy and improve thermal comfort.
Many timber windows are inherently draughty. With gaps of 3mm and more around the edge, they typically account for 20% of the heat loss from your home.
Our sealing system will usually reduce this heat loss by about 80%. It will also reduce noise transmission, dust penetration and eliminate rattles during windy weather.
While you may wish to retain the weathered fixtures of your windows, a complete range of quality brass locks, stops and fasteners are available.
