TERMIUM Plus®
From: Translation Bureau
On social media
Consult the Government of Canada’s terminology data bank.
ROOF JOIST [4 records]
Record 1 - internal organization data 2011-11-21
Record 1, English
Record 1, Subject field(s)
- Roofs (Building Elements)
- Thermal Insulation
Record 1, Main entry term, English
- insulated roof
1, record 1, English, insulated%20roof
correct, officially approved
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 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. 2, record 1, English, - insulated%20roof
Record number: 1, Textual support number: 1 OBS
insulated roof: term officially approved by the Lexicon Project Committee (New Brunswick). 3, record 1, English, - insulated%20roof
Record 1, French
Record 1, Domaine(s)
- Toitures (Éléments du bâtiment)
- Isolation thermique
Record 1, Main entry term, French
- toit isolé
1, record 1, French, toit%20isol%C3%A9
correct, masculine noun, officially approved
Record 1, Abbreviations, French
Record 1, Synonyms, French
- toiture isolée 2, record 1, French, toiture%20isol%C3%A9e
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 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). 3, record 1, French, - toit%20isol%C3%A9
Record number: 1, Textual support number: 1 OBS
toit isolé : terme uniformisé par le Comité du projet de lexiques (Nouveau-Brunswick). 4, record 1, French, - toit%20isol%C3%A9
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2004-03-18
Record 2, English
Record 2, Subject field(s)
- Rough Carpentry
- Structural Framework
- Roofs (Building Elements)
Record 2, Main entry term, English
- rafter tail
1, record 2, English, rafter%20tail
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The part of a rafter which overhangs the wall. 2, record 2, English, - rafter%20tail
Record number: 2, Textual support number: 1 CONT
A rafter is a sloping board used to support a roof; the rafter runs from the top of the wall up to the peak of the roof. A rafter tail is the end of the rafter that visibly projects out from the wall. Rafter tails may be structural (the actual rafter projects from the wall) or false (a secondary board is applied under the eave to imitate the rafter tail). 3, record 2, English, - rafter%20tail
Record number: 2, Textual support number: 1 OBS
Do not confuse with the closely-related term "lookout rafter, "which designates a rafter, bracket or joist which projects beyond the side of a building and supports an overhanging portion of the roof. 4, record 2, English, - rafter%20tail
Record 2, French
Record 2, Domaine(s)
- Charpenterie
- Charpentes
- Toitures (Éléments du bâtiment)
Record 2, Main entry term, French
- prolongement de chevron
1, record 2, French, prolongement%20de%20chevron
masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- extrémité de chevron 2, record 2, French, extr%C3%A9mit%C3%A9%20de%20chevron
feminine noun
- débord de chevron 3, record 2, French, d%C3%A9bord%20de%20chevron
masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
D'abord apparue sur les maisons bourgeoises, la corniche n'existe pas dans les maisons les plus modestes où la saillie du toit est assurée par le seul prolongement des chevrons, protégés par une corniche de bois en Haute Mayenne. 1, record 2, French, - prolongement%20de%20chevron
Record number: 2, Textual support number: 2 CONT
L'architecture historique de la collectivité est caractérisée par ce qui suit : - rondins, roche, bardeaux de bois et stuc; [...] - toitures simples à forte pente; - pignons et lucarnes rampantes; [...] - extrémités de chevron exposées. 2, record 2, French, - prolongement%20de%20chevron
Record number: 2, Textual support number: 3 CONT
La toiture à ressaut présente un imposant débord des chevrons. 3, record 2, French, - prolongement%20de%20chevron
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2004-03-18
Record 3, English
Record 3, Subject field(s)
- Rough Carpentry
- Structural Framework
- Roofs (Building Elements)
Record 3, Main entry term, English
- lookout rafter
1, record 3, English, lookout%20rafter
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
- outlooker 2, record 3, English, outlooker
correct
- tailpiece 2, record 3, English, tailpiece
correct
- tail piece 3, record 3, English, tail%20piece
correct
- lookout 3, record 3, English, lookout
correct, noun
- tail 3, record 3, English, tail
correct, noun
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
A rafter, bracket, or joist which projects beyond the side of a building and supports an overhanging portion of the roof. 3, record 3, English, - lookout%20rafter
Record number: 3, Textual support number: 1 CONT
Cornices may be classified into two main divisions. The open cornice consists of exposed rafter tails and the closed type has the rafter tails enclosed. ... Figure 1-7 shows a section of an open cornice. The lookout rafters are made of dressed stock, generally the size of the common rafter. They should extend approximately the same distance above the plate that they project beyond the building line so that they may be firmly spiked to the sides of the common rafters. The part of the lookout rafter that is exposed to view is, in many cases, cut to some ornamental curve at the bottom and to a plumb cut at its end so as to provide a surface on which a hanging gutter may be attached. A fascia board is sometimes nailed to the plumb cut of the rafters to form a solid base for the gutter. The lookout rafters sometimes extend beyond the building as much as 3 feet and are supported by being spiked to the sides of the common rafters. 4, record 3, English, - lookout%20rafter
Record number: 3, Textual support number: 1 OBS
Do not confuse with the closely-related term "rafter tail," which designates the part of a rafter which overhangs the wall. 5, record 3, English, - lookout%20rafter
Record 3, French
Record 3, Domaine(s)
- Charpenterie
- Charpentes
- Toitures (Éléments du bâtiment)
Record 3, Main entry term, French
- chevron en porte-à-faux
1, record 3, French, chevron%20en%20porte%2D%C3%A0%2Dfaux
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Pièce de bois courte en porte-à-faux sur un mur et servant à appuyer la partie d'un toit en débord. 2, record 3, French, - chevron%20en%20porte%2D%C3%A0%2Dfaux
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Carpintería
- Estructuras (Construcción)
- Techos (Elementos de edificios)
Record 3, Main entry term, Spanish
- viga atalaya
1, record 3, Spanish, viga%20atalaya
correct, feminine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 1975-03-11
Record 4, English
Record 4, Subject field(s)
- Construction Methods
- Structural Framework
Record 4, Main entry term, English
- fit
1, record 4, English, fit
verb
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 OBS
header joist : the large beam or timber into which the common joists are fitted when framing around openings [in a floor or roof ] 1, record 4, English, - fit
Record 4, French
Record 4, Domaine(s)
- Procédés de construction
- Charpentes
Record 4, Main entry term, French
- encastrer 1, record 4, French, encastrer
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 OBS
solive d'enchevêtrure: solive dans laquelle le chevêtre est encastré. 1, record 4, French, - encastrer
Record 4, Spanish
Record 4, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
GCtranslate (available on the Government of Canada network only)
Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified:


