Rafter
Definition and meaning of Rafter in real estate.
A rafter is a sloped structural beam that extends from the ridge of a roof to the eaves, designed to support the roof deck and its shingles. Rafters are critical components of a traditionally framed roof system, often referred to as stick framing.
In more detail
Typically constructed from dimensional lumber, rafters are placed parallel to each other at regular intervals. They transfer the weight of the roof load down to the exterior walls of the building. Unlike prefabricated roof trusses, which are built in a factory and delivered as unified triangular structures, rafters are cut and assembled individually on the construction site.
For home buyers and renovators, rafters create an open attic space that can be converted into living area, whereas trusses often restrict attic conversion due to their internal webbing.
Key facts
| Category | Property Types & Construction |
|---|---|
| Function | To support the roof decking and external weather barriers |
| Alternative | Prefabricated roof trusses |
| Material | Typically dimensional wood lumber or engineered wood |
During a loft conversion, the contractor reinforces the existing roof rafters with additional support beams to safely handle the weight of new drywall and flooring.
Frequently asked questions
What is the difference between a rafter and a truss?
Rafters are individual sloped beams cut and built on-site, leaving an open attic space. Trusses are prefabricated triangular structures containing diagonal web supports that limit usable attic space.
How far apart are rafters usually spaced?
Rafters are typically spaced twelve, sixteen, or twenty-four inches apart on center, depending on the span, wood species, and local building codes.