Timber Window Repairs & Restoration

Lenval is a family-run business with vast knowledge and expertise in the repair, renovation and restoration of windows. Offering our services across London and the southeast, you can trust us to provide you with a professional and customer-focused approach as well as enjoy impressive standards of quality, finish and durability every time you require our services.

Adhering to the highly acclaimed Window Care system – recognised by local authorities, architects and housing associations for its impressive results – Lenval provides a proven and sustainable way to extend the life of your timber windows. We are sympathetic to the original features of the building and aim to accurately restore your windows to be true to their heritage.When timber windows begin to deteriorate, over time they can become rotten and loose, leading to problematic issues such as draughts, dampness, lack of insulation, costly bills and even potential health risks. Not only this, but windows are often significant to the character of a building and if they are damaged or deteriorating it can impact the look, structural integrity and value of a building if not repaired.


How Does the Window Care System Work?

Designed for exterior application, the Window Care system is specially formulated to provide authentic and long-lasting repairs to your timber windows. Our experts will use an extensive range of quality joinery repair products to replace or repair rotten sills, frames and glass, before priming and painting your windows to restore them to their original finish. Choosing Lenval to undertake your window restorations also means that you can take advantage of upgrades to your original window specification such as adding ultra-slim double-glazing units or overhauling them to prevent further rattles and drafts.

With Lenval’s Window Care system we offer a guarantee of 10 years which also extends the life of the paint cycle from five to seven years. Without the need for internal access, you can enjoy non-invasive window restorations as our highly trained specialists assess the damage to your windows and conduct repairs to restore them to their full former glory.

Asbestos Experts

Our UPVC Window Repairs 

Without proper maintenance of a building’s UPVC windows, they may become damaged or worn over time, compromising the safety and performance of your windows. At Lenval, our specialists are highly experienced in UPVC window repair, and we offer a wide range of money-saving UPVC window repair services including window assessments to advise on any damage, replacement of handles or mechanisms to ensure proper functionality, cleaning of fixtures and fittings and can reassure you of the structural integrity of your windows.

As experienced specialists in UPVC window repairs, we know that replacing a window can be an expensive process, therefore we’ll take the necessary steps to find the most cost-effective solution to your UPVC window repairs. Repairs are often a more financially savvy option rather than replacement and our expertise allows us to advise on the best action to take to efficiently repair your windows.

View Our Case Studies

We Offer Free Estimates

Send us a message detailing which services you require and a member of our team will get back to you ASAP.


    Lenval has a wide range of experience with a variety of clients who have formed long-term relationships with us. We cover London & surrounding counties with projects from £1000 to £1 million.

    Our proactive and customer focused attitude ensures that we enjoy a high percentage of repeat works.


    Lenval Ltd
    Greenacres Farm
    'The Barn'
    Arterial Road
    Stanford-le-hope, Essex
    SS17 8PB