TERMIUM Plus®

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INSULATED ROOF [1 record]

Record 1 2011-11-21

English

Subject field(s)
  • Roofs (Building Elements)
  • Thermal Insulation
CONT

Super insulated roofs have a thermal resistance rating of R-45 or greater and a vapor retarder on the warm side of the insulation. Generally these systems are not vented or are vented only enough to avoid creating a vapor trap in the attic or roof joist space. A super insulated roof greatly reduces, but does not stop heat escaping the building. In some places, super insulation without ventilation is enough to eliminate chronic icing at eaves.

OBS

insulated roof: term officially approved by the Lexicon Project Committee (New Brunswick).

French

Domaine(s)
  • Toitures (Éléments du bâtiment)
  • Isolation thermique
CONT

Les résultats de la défaillance de l'isolant sont beaucoup moins évidents que ceux de la défaillance de l'imperméabilisation. Néanmoins, la défaillance de l'isolant entraîne beaucoup plus de dépenses. Par exemple, si la valeur «U» d'un toit isolé est de 0.067 Btu/h pi² F, la perte de chaleur totale annuelle par 100 pi² de surface est d'environ 1,6M Btu (millions de British thermal units).

OBS

toit isolé : terme uniformisé par le Comité du projet de lexiques (Nouveau-Brunswick).

Spanish

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