The thermal performance of our homes is a matter of increasing importance for a number of reasons, in particular managing CO2 emissions, fuel costs, health and comfort.
For different people, living in different types of property, the ideal balance between these priorities will vary – but all will need to be considered when developing an effective strategy to make improvements.
Another factor that must be taken into account is the health and condition of the building itself. For a heritage home this element is of particular importance, partly because of the need to protect its inherent cultural value and character. But this is also due to the fact old buildings are complex environments, sensitive to changes that may have serious unintended consequences.
Building structure
Before undertaking any measures that will have an effect on the functional performance of a period house, it is essential to understand how the structure’s fabric works.
Homes built before about 1919 tend to be of traditional construction – so they feature solid walls that were generally made using soft, flexible and permeable materials.
They don’t incorporate vapour barriers or damp proof membranes (as with modern buildings). They instead manage damp and moisture in a different way, through absorption and evaporation. This is known as breathability.
The key rule is that any work you undertake to your period property must maintain the breathable performance of the building’s fabric.
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