Ventrolla | London | Wooden Sash Window Specialists

Offering Replacement sash windows, sash window repair,
double-glazing & draught-proofing to London & Surrounding Areas

Beautiful Sash Windows In London, By Ventrolla

If you love the period charm and heritage innate in your wooden sash windows but hate the draughts, rattles, rot and heat loss that can also be part and parcel with an older property then you need help from Ventrolla, the original sash window repair company.

With over 35 years’ experience repairing sash windows across London, you can trust Ventrolla. We work on all types of domestic property from two up two down Victorian terraces, Georgian townhouses to Edwardian mansions and everything in between.

Ventrolla specialise in restoring the original timbers to leave you with beautiful, smoothly operating sash and casement windows free from rot, draughts and rattles. We are also experts in improving energy efficiency by installing double glazed sash windows into the original box frames to retain the period aesthetics while offering modern levels of heat retention. Our Secondary glazing option will reduce intrusion of outside noise and when the original timbers are not salvageable we can craft bespoke new windows that match the style of the existing ones.

Ventrolla London is accredited by CHAS, Constructionline and FENSA, ensuring both our residential and commercial customers receive the highest quality sash window repair and replacement services throughout the London area.

Services we provide:


residential customers


For residential projects including sash window repair and wooden double glazing we cover all of London, from the North to South, East to West, taking in Central London and the City. We offer a personal and friendly sash window repair and replacement service, working with homeowners and landlords to ensure we cover all our customers’ needs. We have many years’ experience working on Graded and Listed Buildings, as well as properties in Conservation Areas. We’ve even worked on an exciting selection of celebrity homes! But we didn’t tell you that…

Commercial projects

We cover all London postcodes for commercial sash window repair and full replacement projects, offering free, no obligation surveys, estimates and tender packages. We are happy to provide advice to businesses looking for a solution to both large and small projects. Our expert team of timber sash window specialists has many years’ experience working alongside architects, main contractors, designers and managing agents, from refurbishment and performance upgrade projects, to full bespoke replacement of windows and doors.

“We are pleased with the quality of the work all round, but the improvement in the private rooms is particularly noticeable. The rooms are used to host meetings, conferences and dinner parties and we were experiencing real problems with traffic noise disturbing guests. Ventrolla recommended a special type of glass product which works brilliantly in keeping unwanted noise out but doesn’t detract from the style and finish of the windows.”
- Phil Hillman, Chief Engineer for Brown’s Hotel, London
Ventrolla London
Sash Window Repair

Ventrolla House
Unit 5 Peacock Industrial Estate
20 White Hart Lane
London N17 8DT

t: 0800 0277 454


Contact Us

From terrace house to manor house, restoration to full replacements, one window or a thousand, we can help. Get in touch with our friendly team today.

A selection of completed sash window restoration projects in London

Bruce Castle Museum

Ventrolla has put its skills on public display by upgrading windows at an historic London Museum.

Housed within a Grade I listed 16th century manor house, Bruce Castle Museum in Tottenham contains local history collections and archives for the Borough of Haringey.

Browns Luxury Hotel

Timber window renovation specialist, Ventrolla, has added a ‘touch of glass’ to London’s oldest hotel.

Most were in public areas such as the restaurant and tea lounge and have been fully draught-proofed and renovated as part of the project.

The Kensington Hotel

Ventrolla checked in with a stylish boutique hotel in South Kensington to assist with a major restoration project.

The company was appointed by The Kensington Hotel to restore the period wooden sash windows on the building’s front elevation.