Roof Jack Definition

It is used to relieve thermal stresses in a roof system where an expansion joint is not required or to separate large roof areas sometimes referred as a control joint.

Roof jack definition.

Squirrels can damage the jacks by chewing on the soft lead covering to sharpen their teeth. Slide the upper tab on the jack under the shingle so that nail hole in the jack is barely covered. 1 a platform or other support erected on a roof to facilitate repair painting etc. The jacks must be properly nailed or leaks in the roof could occur.

Contractors will call them pipe boots or roof jacks also if there is a leak some will want to apply caulk sealant or other mastics to make the repair on a cracked rain collar. Dictionary of construction terminology roof jack. Roof jacks fit over plumbing vent pipes that protrude through the roof to keep them from leaking. The galvanized steel construction of a traditional roof jack provides durability while the vent cap keeps out water.

Steps to replacing a roof vent jack. One of the pieces simulating extended rafters under the eaves in some styles of building. Lift up the tab and nail the jack into place. Also if there is a leak some will want to apply caulk sealant or other mastics to make the repair on a cracked rain collar.

Sturdy galvanized steel construction. A flashed assembly usually extending above the surface of the roof that is anchored to the roof deck. Roof jacks are use for attic ventilation and protection from rain snow and debris. 1 a platform or other support erected on a roof to facilitate repair painting etc.

Also an airtight fitting attached to the roof and joining the internal and external sections of a vent pipe. 2 a smoke vent of a chimney. Roof jacks are nailed to the roof directly over rafters for strength. If you have squirrels in your area there is a good chance the lead roof jacks on your home need to be replaced.

Lift up the tab of a shingle where you wish to install the jack. Also an airtight fitting attached to the roof and joining the internal and external sections of a vent pipe. A secondary roof timber as a common rafter resting on purlins also. Roof jacks are used as boot flashing around pipes extending through roof.

Roof jacks are used to prevent rain snow and debris from entering a home through attic ventilation and vent pipes that exhaust kitchen and bath fans. Definition of jack rafter. They can also be used to vent exhaust from kitchen and bath fans etc.