Conservation & Heritage Issue 52 Summer/Autumn 2026 - Flipbook - Page 24
the architectural integrity of historic windows. Designed for
period and listed buildings, it allows windows to open and
close as originally designed, while maintaining their original
appearance.
individual rooms and zones. Whatever solution is most
appropriate, our approach prioritises minimal intervention.
Existing ventilation grilles and ducting routes are used
wherever possible, core drilling through external walls is kept
to a minimum, and any new ducting is installed discreetly.
A key advantage of CosyGlazing is its ability to work
discreetly with traditional windows, including stone mullions
commonly found in historic and listed buildings. Bespoke
fixings allow the system to be integrated with minimal visual
impact while preserving the original appearance of the
window.
We’re proud to support a wide range of heritage and
institutional clients including; Royal Palaces, The National
Trust, Exeter Cathedral, The Crown Estate, Northampton
Cathedral, The Duchy of Cornwall and Wells Almshouses.
Our solutions are designed to align with conservation
principles and are well understood by many conservation
officers and local authorities, with some advising that Listed
Building Consent may not be required where our systems are
being considered.
As part of any insulation upgrade, Mitchell & Dickinson also
assess ventilation requirements. Where passive ventilation
alone is not sufficient, mechanical ventilation solutions may
be recommended. These can include demand-controlled
ventilation (DCV), using smart humidity-controlled extract
fans in bathrooms and kitchens, or mechanical ventilation
with heat recovery (MVHR), where heat from stale outgoing
air is transferred to incoming fresh air. MVHR systems
are particularly effective in well-sealed properties or within
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As the conservation sector continues to address energy
efficiency and climate challenges, sensitive retrofit solutions
will play an increasingly important role in ensuring historic
buildings remain practical, comfortable and sustainable for
future generations.
Conservation & Heritage Journal
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