Sash Window Double Glazing Upgrade in Borehamwood , Hertfordshire

Standard modern double glazing is often too thick to fit into traditional timber sash frames, which can result in bulky sightlines that ruin the appearance of Victorian or Georgian windows. Our double-glazed units are specifically designed for heritage buildings. They feature low-emissivity glass and argon-filled cavities, providing excellent thermal efficiency while maintaining the authentic profile of your original timber bars. This approach allows you to upgrade your windows while remaining sympathetic to the architectural style of your home.

Beyond upgrading the glass, our restoration process includes thorough draught-proofing to tackle the persistent problem of heat loss. We machine hidden brush seals into your new parting and staff beads, creating a continuous seal around the sash perimeter. This eliminates cold draughts and annoying rattles, ensuring your windows glide smoothly as intended. By combining double-glazed units with precise draught exclusion, we transform old, energy-draining sashes into highly efficient windows that keep your rooms comfortable throughout the year.

Many period homes in the Borehamwood and Hertsmere area are located within conservation zones where external alterations are strictly monitored. Because we focus on repairing and upgrading your existing box frames using bespoke timber joinery, our methods are often the preferred choice for property owners facing planning constraints. By keeping the original frames and only updating the glazing and internal components, we help you meet modern energy standards while respecting the strict aesthetic requirements of local authorities.

Every project we undertake is managed with attention to detail, from the initial assessment to the final finish. As a FENSA-registered specialist, we provide a 10-year guarantee on all our new bespoke timber installations, giving you complete peace of mind. We maintain a focus on durability, using seasoned timber and robust joinery techniques to ensure your sash windows stand the test of time. Our goal is to provide a clean, professional, and reliable service that restores both the performance and the value of your period property.