Bringing 21st century technology
to heritage buildings
There is a common misconception that replacing glazing in a listed building with vacuum glass doesn’t require planning permission. In our opinion, this notion is a bit of a stretch. While new glazing of similar thickness to the original glass can be installed, fitting vacuum glazing is a different matter. Planning permission is necessary due to the variance in thickness and the use of modern float glass.
It's also a misconception that you can effortlessly replace the glass in an old period sash designed for single glazing with vacuum glass. This approach would require substantial modifications to the old sash to accommodate vacuum glass, often making it financially impractical and leading to a structurally weakened, modified sash.
Depending on your specific building, condition of your existing windows, and your local authority’s planning policy it may be possible to gain planning permission for complete new windows and or doors using our Heritage Range with vacuum glass. The majority of inner London local authorities will not grant permission for ‘complete’ new windows (fames and sashes) but will grant listed building consent and planning remission to retain your existing frames and to retrofit or replace the sashes containing vacuum glass.
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