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14 April 2025

Assessing heat loss from draughts

Often the occupants know all too well where the main sources of draughts are!

Before introducing any draught-proofing measures to a period property, it is essential to conduct a thorough assessment. Windows and doors are obvious heat loss areas, but floorboards, chimneys, loft hatches and entry points for cables and pipes can also be major culprits. Other sources include gaps in skirtings, suspended floors over ventilated voids, and gaps in timber-framed structures.

A careful inspection should include looking for signs of previous inappropriate repairs, such as foam sealants or hard mastics, which may have cracked over time, causing further air leakage and material deterioration. Additionally, misaligned or warped wooden components can introduce gaps that must be addressed with flexible and breathable sealing techniques.

Research suggests that in an uninsulated two-storey detached house, heat loss via draughts and infiltration may account for approximately 30% of total heat loss for the whole building. In semi-detached, terraced and multi-storey buildings, this percentage can be even higher due to proportionately lower heat loss through walls and floors. Air pressure tests, thermal imaging, and smoke tests can help identify problem areas - often these are used in combination.

In many cases, though, an expert will be able to make an assessment from simply examining the key elements. And often the occupants know all too well where the main sources of draughts are!

Draught proofing in period buildings is a specialist task that requires careful planning and an understanding of traditional construction methods. Retrofitting energy efficiency measures without compromising the building's integrity is challenging and working with an experienced company likeMitchell & Dickinsonis highly recommended.

A contractor with expertise in historic buildings will be able to identify key areas of heat loss quickly. Their knowledge ensures that the most appropriate solutions are applied, balancing modern energy efficiency standards with traditional building materials and techniques. Conservation specialists will also be familiar with the nuances of listed buildings and conservation areas, ensuring that all work is compliant with regulations and does not detract from the historic character of the property.

An experienced team can provide tailored recommendations, from selecting the right type of secondary glazing to advising on underfloor insulation techniques that maintain breathability. With professional input, homeowners and conservation professionals can significantly reduce heat loss while preserving the integrity of the building.

For more information on Mitchell & Dickinson, call 01237 871 127 or visitwww.mitchellanddickinson.co.uk   

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With compliments:
 

Taylor Alden
media@tayloralden.co.uk