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Glossary
Perplexed by all this talk of u-values and blower door tests? Our sustainable building glossary will help you get to grips with the key terminology.
| Term | Definition |
|---|---|
| Joist | A joist is one of the horizontal construction elements, typically made of timber, that support a ceiling, roof, or a floor. Insulation materials are often installed between the joists, which run parallel to each other. |