What we do

Our Services

Draught Proofing, Slim Double Glazing for Existing Period Windows, 
Restoration and New Joinery

New Joinery for Windows

Whether you have a new build project or if your existing windows are not suitable for double glazing, we will be able to confirm on our free survey. Envirosash offer high quality bespoke sashes and full window replacement services at competitive prices

Double Glazing for Existing Period Windows

Enjoy the benefits of slim double-glazing whilst maintaining the original charm of your existing windows with our window services. Eliminate condensation problems and significantly reduce external noise. Envirosash will transform the comfort of your home.

Draught Proofing for Windows

No more draughts and rattles once draught proofing has been applied, just a more comfortable and energy efficient home! Our draught proofing services will make a significant difference to the comfort levels in your home and reduce any unwanted external noise.

Restoration of Existing Windows

We believe in restoration before replacement, which is why we always look to restore and conserve the original period features of your windows wherever possible. We go further than others in respect to restoration and repair work. No quick fixes.

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