Jack Roof Meaning

North american 1 a platform or other support erected on a roof to facilitate repair painting etc.

Jack roof meaning. One of the pieces simulating extended rafters under the eaves in some styles of building. The steep roof with windows creates an additional floor of habitable space a garret and reduces the overall height of the roof for a given number of. What effect does ponded water have on aluminum roof coatings. Thus there are hip jack rafters and valley jack rafters.

Noun a rafter having less than the full length of the roof slope as one meeting a hip or a valley most material 2005 1997 1991 by penguin random house llc. One of the shorter rafters used in a hip or valley roof. Aluminum coatings do not perform well on roofs that pond water. Roof framing involves a lexicon all its own.

Roof jacks are usually constructed from steel and can be purchased from home centers lumber yards or hardware stores. Definition of jack rafter. When repairing or replacing a roof it pays to be familiar with these terms. A secondary roof timber as a common rafter resting on purlins also.

If the jack does not have an adjustment that will make the walking surface level tilt the jack inward instead of outward for safety. Made of lead rubber or metal. Pre formed flange placed over a vent pipe to seal the roof around the vent pipe opening. Includes illustrations that show roofs have hip rafters ridge boards jack rafters and more.

New asphalt built up roof bur surfaces should weather a minimum of 90 to 180 days prior to coating with black jack aluminum roof coatings. Here is a closer look at common roofing terms. Made of lead rubber or metal. Roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect.

Roof shapes differ greatly from region to region. The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering. The total rise of hip and valley rafters is the same as that of common rafters. Modified entries 2019 by penguin random house llc and harpercollins publishers ltd.

Usages vary slightly from region to region or from one builder or architect to another. A jack rafter is a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. A mansard or mansard roof also called a french roof or curb roof is a four sided gambrel style hip roof characterized by two slopes on each of its sides with the lower slope punctured by dormer windows at a steeper angle than the upper. Also an airtight fitting attached to the roof and joining the internal and external sections of a vent pipe.

Dirt can accumulate in depressions and inhibit the reflectance of the coating. Most roof jacks are adjustable to compensate for different roof pitches.