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Cozy terraced town houses covered with beautiful wisteria sinensis in Kensington and Chelsea, London, England, UK.

Integrated insulation , ventilation and restoration specialists for period and listed properties

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Beautiful, comfortable period homes

Imagine if your period home was warmer in winter, cooler in summer, with no signs of damp or mould? We help you protect your home’s historic fabric while transforming comfort, air quality and energy efficiency.

Period and listed properties often suffer from:

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  • Overheating in summer, especially attic rooms
  • Damp patches, mould and peeling paint​
  • Cold and draughty in winter​
  • Condensation on windows and walls​
  • Rotting window frames​

These are not usually simply “old house quirks,” they could be signs your home is losing heat – and not ‘breathing’ as it should​.

Comfort and preservation must work together
In period and listed homes, insulation and ventilation shouldn’t be treated separately. Insulation keeps warmth in during winter and reduces heat loss, thereby saving energy. Ventilation can remove excess moisture, stabilise humidity and prevent overheating. Working  together, they:
  • Protect historic building fabric
  • Reduce condensation and mould
  • Improve air quality
  • Reduce energy costs
  • Improve year-round comfort

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With over 15 years of practical experience working in the most beautiful heritage properties in the country, this integrated approach, applied with care and respect for your building’s aesthetic, to high standards of craftsmanship, is what sets Mitchell & Dickinson apart.
See How It Works
A coordinated approach to building health.
We start every project with an expert survey. Because no two period homes are the same. From there, we design a tailored combination of:
  • Discreet UV-protected secondary glazing that allows for ventilation
  • Loft , underfloor and sloping ceiling insulation with cross ventilation
  • New or restored working shutters
  • Smart humidity-responsive fans
  • Mechanical Ventilation Heat Recovery systems (MVHR)
  • Window and door restoration and
  • Draught control

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All working together. Not as separate products — but as one integrated approach.
The result?
A warmer, more comfortable home, lower energy use, improved air quality and a healthier building .
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Ultimate Guide to Secondary Glazing for Sash Windows
Ultimate Guide to Secondary Glazing for Sash Windows

Secondary glazing for sash windows offers a smart retrofit: an extra interior pane that keeps the original window fully intact yet delivers modern performance.

Heritage shutters for period and listed properties
Heritage shutters for period and listed properties

We offer three shutter options for period and listed homes.
draught proofing and insulation
Full insulation

The easiest way to combat heat loss, particularly in a period property, is to insulate it
Window Restoration by Mitchell & Dickinson
Window and door restoration

How we can restore your windows and doors to their former glory
Designed for homes with history
Our clients are custodians as much as homeowners. They care about:
  • Preserving original features
  • Avoiding damage from inappropriate treatments
  • Protecting the long-term integrity of their building
  • Being warm and comfortable
  • Saving energy and CO2

If you’re interested in finding out more about our products and services in , we’re happy to talk you though your options.

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Customer stories
Lucy Johnson London

Lucy Johnson

How we helped Lucy make her Georgian home in London
Owners on Sancreed House, Pablo and Grove sat on a sofa at property with CozyGlazing

Pablo and Grove

How we helped Pablo and Grove make their Georgian bed
Cosyglazing Secondary Glazing Installation

Mark and Sarah

How we helped Mark and Sarah Ansell future-proof their Georgian
Mitchell and Dickinson vans outside a stunning period property

CosyGlazing installation at Grade 2* listed property

We had the pleasure of installing our revolutionary CosyGlazing secondary
Mitchell & Dickinson secondary glazing case study Cornwall, clients by front door

Hugh and Kiki

A case study of a 200-year-old house in Cornwall, which
The Cooks Secondary Glazing Windows

The Cooks

How we successfully insulated a beautiful Georgian town house
Pickwell Manor | Mitchell and Dickinson

Stephen and Susannah

How we successfully restored the windows in a Jacobean manor
couple standing outside their period property

Michael and Susan

How we installed secondary glazing to windows in a large
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Professional Partnerships
A trusted partner in heritage projects for architects, building and facilities professionals. Architects and conservation professionals rely on us for:

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  • Integrated insulation and ventilation expertise
  • Evidence-based recommendations​
  • Reduced professional risk​
  • Clear documentation for planning and consent​
  • Proven experience in listed buildings​
  • High standards of craftsmanship​
  • Measured CO2 outcomes​
We collaborate early - often pre-design - to ensure, thermal performance, ventilation and moisture considerations as well as heritage protection are aligned from the outset .
Professional Partnerships