Even if a building is secure and well constructed, the internal environment must be right for the objects stored inside or there is risk of damage from damp, mould, pests or dryness and excessive heat.
The floor inside each shelter is un-insulated concrete which, together with the walls, provides massive thermal stability across the year with the additional conversion measures specified by NCS. These include a hygroscopic paint on the steel lining inside, an acrylic seal on the floor slab and additional sealing around the 40 ton doors. Back-up cooling and humidity control equipment is installed in those shelters for which the environmental specification would require additional control at demanding times of the year.
The environment for archives, books and other relevant organic material objects needs to meet the humidity and temperature specifications in PD5454 all year round and must be free of pests that might cause damage to the collections. NCS has specified the appropriate environments in different shelters depending on their contents, and NCS staff monitor these to ensure compliance.
Shelter no.1, NCS's first fully fitted store inside the QRA enclosure, has been designed to meet PD5454:2012 Clause 4.2.2, i.e. 13° C to 20° C and 35% to 60% RH. A second storage shelter has been fitted out with the same environment, set up to take large, museum objects and paintings as well as archive and library materials.
We are committed to minimising the carbon footprint at the site and to the use of non-renewable energy. The NCS shelters at Heyford can maintain internal conditions with the lowest possible input of energy, making them green solutions for long term care of heritage.
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