Roof Jack Definition

Sturdy galvanized steel construction.

Roof jack definition.

A secondary roof timber as a common rafter resting on purlins also. 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. A flashed assembly usually extending above the surface of the roof that is anchored to the roof deck. 2 a smoke vent of a chimney.

Roof jacks are used as boot flashing around pipes extending through roof. 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. Roof jacks are use for attic ventilation and protection from rain snow and debris. One of the shorter rafters used in a hip or valley roof.

If you have squirrels in your area there is a good chance the lead roof jacks on your home need to be replaced. The jacks must be properly nailed or leaks in the roof could occur. Lift up the tab of a shingle where you wish to install the jack. Roof jacks fit over plumbing vent pipes that protrude through the roof to keep them from leaking.

Roof jacks are nailed to the roof directly over rafters for strength. Lift up the tab and nail the jack into place. Dictionary of construction terminology roof jack. The galvanized steel construction of a traditional roof jack provides durability while the vent cap keeps out water.

One of the pieces simulating extended rafters under the eaves in some styles of building. Roof jack sleeves that fit around the black plumbing waste vent pipes at and are nailed to the roof sheeting. 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. 2 a smoke vent of a chimney.

1 a platform or other support erected on a roof to facilitate repair painting etc. They can also be used to vent exhaust from kitchen and bath fans etc. Slide the upper tab on the jack under the shingle so that nail hole in the jack is barely covered. Squirrels can damage the jacks by chewing on the soft lead covering to sharpen their teeth.

Also an airtight fitting attached to the roof and joining the internal and external sections of a vent pipe. Definition of jack rafter. Steps to replacing a roof vent jack.