Double Glaze and Re-glaze Existing Sash

Seamless Double Glazing for Original Sash Windows in London

Elevate the comfort and efficiency of your period property without sacrificing its character. At SashUnique, we specialise in expertly retrofitting double glazing into existing sash windows, a service increasingly sought after by homeowners across all London who wish to enhance thermal performance while preserving original features. Unlike full window replacement, our meticulous approach retains your classic timber frames, maintaining the architectural integrity that defines your home’s charm and often its value. Our process begins in our London workshop, where we craft bespoke, slim-profile double glazed units designed to fit perfectly within the original glass rebates. Using advanced low-E glass andargon-filled cavities, we significantly improve insulation—reducing heat loss, minimising external noise, and combating condensation. This is particularly beneficial for properties in bustling North London neighbourhoods or exposed London locations. The upgraded glass is discreetly bedded using traditional methods and high-performance sealants, ensuring a weathertight finish that looks entirely appropriate for the period. For homes in London’s conservation areas or those with listed status, our re-glazing service offers a sensitive solution that typically falls under “like-for-like” repair, easing the planning process. We guide you through appropriate options, including heritage-acceptable tones and bar dimensions that match the original astragals. Serving all London postcodes from our base, we provide a sustainable alternative to uPVC replacement, protecting your investment and the environment. Choose SashUnique to modernise your home’s performance through a reversible, respectful upgrade that honours its history.