We Offer Bespoke Joinery Tailored To Your Individual Needs

If your existing period windows are beyond repair or perhaps you require new joinery for a new build project then we have a solution for you.

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New Bespoke Joinery

a complete new box sash or sashes to fit your existing boxes, Envirosash can manufacture and fit beautiful timber bespoke joinery to suit your individual requirements.

Our replacement bespoke joinery can be made to look in keeping with your existing windows by replicating their often unique profiles and features.

Our bespoke joinery is hand made from a range of different timbers using traditional construction methods, such as wedged mortice and tenon joints. We mainly use Accoya, which is a sustainably sourced wood that goes through an acetylation process creating an extremely durable timber. 

This means that all of our sliding sash windows, casement windows and doors are built to last.

  • Curved or square headed windows
  • Traditional weights, cords, and pulleys
  • Double or single glazing
  • Choice of timber
  • Extended sills if required
  • Your choice of moulding and glazing bead design
  • Timber staff and parting beads
  • Horns – style and length
  • Butt or friction hinges
  • Traditional stays and fasteners or modern equivalents 
  • Ironmongery to your specification – style and finish

Each new timber window that we produce is individually customised with your choice of options…

Happy customers

Client testimonials

Natasha, Maida Vale


"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."

Mervyn, Crouch End


"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."

Sarah, Gravesend


"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."

The Timber Window Specialist