Heritage Slimline Units

Slimline Heritage Double Glazed Units are specially designed insulated glass units for period, traditional and heritage-style windows where a conventional double-glazed unit would be too thick. They provide the benefits of double glazing while maintaining a much slimmer appearance, making them particularly suitable for sash, casement, timber and steel windows where preserving the original character of the property is important. Glass Delivered supplies made-to-measure heritage slimline units tailored to period window specifications.

Yes. A correctly specified insulated glass unit will provide significantly better thermal insulation than single glazing. Performance varies according to the glass type, cavity size, gas fill, Low-E coating and overall unit construction. For this reason, we recommend selecting the specification based on both the available space and the required thermal performance.

In many cases, yes. Slimline units are specifically designed for applications where the available glazing rebate is too shallow for conventional double glazing. They can be suitable for existing timber sash and casement windows, as well as other traditional window systems. However, every window is different, so the available rebate should be checked before ordering.

Yes. One of the main advantages of slimline heritage glazing is its discreet appearance. The slim overall profile and narrow sightlines help the finished glazing retain the proportions and character associated with traditional single glazing. Heritage or restoration glass can also be specified where an authentic period appearance is required.