facebook pixel Roof Construction Basics | HomeTips
Select Page

Roof Construction Basics

House roof framing and construction diagrams, with important roofing terms, roof shapes and framing types.

Carpenters nail plywood sheathing to the roof rafters—in this case, a series of roof trusses.TFoxFoto / Shutterstock.com

Carpenter uses a pneumatic nailer to attach plywood sheathing to the roof rafters—in this case, a series of roof trusses.

Roofs take quite a beating. Fully faced toward the sky, they catch the brunt of weather’s worst. They have to be able to take a licking and keep from leaking. They must be weathertight, secure, durable, attractive, and elastic enough to withstand severe temperature shifts without cracking.

Over the centuries, roof-building techniques have been refined to yield roofs of considerable strength and durability. A wide variety of materials has been developed that will last many years—in some cases, as long as the house. And homeowners have a vast selection of materials, colors, prices, and other features from which to choose.

Roof Construction Diagram ©HomeTips

A contemporary roof, regardless of shape or surface material, consists of a variety of components that include wood framing, sheathing, underlayment, flashing, gutters, and, of course, the shingles or other finished surface. The illustration here shows how these materials go together to make for a sound roof.

The roof deck is made up of sheathing and, in most cases, underlayment, which is called roofing felt. The type of deck used depends on the finished roofing material. Most call for solid plywood or oriented-strand-board (OSB) panel sheathing; wood shingles and some tile or metal roofs call for spaced-board sheathing.

Roofing felt is sandwiched between the sheathing and the surface material on most roofs. This heavy, fibrous black paper saturated with asphalt helps repel any water that might find its way past the roofing material.

Flashing helps repel water wherever the roof surface is broken by dormers, intersecting roof planes, and protrusions, as well as along the roof’s edges. Flashing is traditionally made from galvanized steel, aluminum, or vinyl.

NEXT SEE: How Roof Flashing Works

Featured Resource: Find a Pre-Screened Local Roofing Contractor

Call for free estimates from roofing pros now:
[telnumlink] 1-866-342-3263[/telnumlink]

About Don Vandervort
Author Image
Don Vandervort developed his expertise more than 30 years ago as Building Editor for both Sunset Books and Home Magazine. He has written more than 30 home improvement books and countless magazine articles. He appeared regularly on HGTV’s “The Fix,” and served as MSN’s home expert. Don founded HomeTips in 1996.

Related Posts:

Join the Conversation

Submit a Comment

Your email address will not be published. Required fields are marked *