Technical advice

All old buildings need regular care and maintenance in order to prevent serious disrepair. Windmills and watermills are by their nature exposed to wear from wind and water in addition to facing problems common to historic buildings. The resources below provide information and guidance on repairing, maintaining and operating mills. They enshrine the Mills Section’s philosophy of repair of windmills and watermills.

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Philosophy of repair

This leaflet outlines the Mills Section’s views on the best way to approach the protection and repair of windmills and watermills.

Damp problems in brick windmill towers

There is no easy answer to the problem of leaky windmill towers. Our guidance leaflet considers the causes of damp in brick towers and suggests different options to address the problem effectively. Members' only resource.


Most windmills and many watermills in England were originally covered with wooden weatherboarding to protect their timber framing from the elements. This technical guide provides guidance on how to undertake weatherboarding on mills today. Members' only resource.

Guide to UK mini hydropower developments

A guide by the British Hydropower Association for anyone planning to develop a small-scale hydro-electric scheme in the UK.

Health and safety in windmills and watermills

As mills were not designed for public viewing, and were built long before modern safety standards were thought of, this guide has been written to help mill owners and managers to comply with modern legislation and safety expectations while keeping a mill as original as possible.