Roof Components

Roof components are the individual structural parts that work together to protect your home from the elements, including shingles, flashing, underlayment, decking, and ridge caps. Understanding how these pieces function helps you spot potential issues early and communicate clearly with pros when repairs are needed. Whether you're planning maintenance or assessing storm damage, Angi connects you with local roofing pros and guides to keep your roof performing at its best.

Related to Roof Component Service

Roof Component Service Articles and Advice
Lauren Bongard  •  Jul 15, 2026
How Much Do Roof Trusses Cost? [2026 Data]
Roof trusses are the literal backbone of your roofing system, and replacing one can get costly. Use this roof truss cost guide to set your budget properly.
Stephanie Mickelson  •  Jul 15, 2026
How to Install Snow Guards on a Metal Roof Properly
In areas that see heavy snowfall, understanding how to install snow guards on a metal roof is important for protecting people, property, and the roof itself.
Anna Baluch  •  Jul 15, 2026
What Are Snow Guards and Why Do I Need Them on My Roof?
In this article, we will answer the question, “What are snow guards?” and walk you through whether or not you need them on your roof.
Rachel Hoffman  •  Jul 9, 2026
Roof Sheathing Thickness: What Size Do I Need?
Your roof requires the right support to keep your home protected. Learn about roof sheathing and how to determine the right roof sheathing thickness.
Nick P. Cellucci  •  Jul 9, 2026
Roofing Terms and Definitions Every Homeowner Needs to Know
Learn common roofing terms to help you speak more confidently to roofing contractors and make smarter consumer decisions when purchasing a new roofing system.
Samantha Hawrylack  •  Jul 9, 2026
What Is Ice and Water Shield—and Why Do You Need It?
An ice and water shield can protect your roof and save you the headache of premature roof replacement. Learn everything you must know about the shield.
Marwa Hasan  •  Jul 9, 2026
What Is a Scissor Truss?
Are you building a new home and exploring different types of roof trusses? A Scissor truss is a great way to add extra room to your roof. Learn the pros and cons of a scissor truss and more about how it is engineered and installed.
Deane Biermeier  •  Jul 9, 2026
How Much Does Roof Ridge Cap Replacement or Repair Cost? [2026 Data]
Learn all of the factors you need to consider to estimate roof ridge cap replacement costs, whether it’s safe and worthwhile to DIY the work, and more.
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Common Roof Component Service Questions

If you’ve had a recent weather event or any other issue that caused roof damage, there’s a chance your caps are damaged also, and it’s worth having an inspection done to see if you need roof ridge replacement or repair. You should also keep an eye out for caps that are visibly deteriorating or curling. Here are more signs to look out for:

  • Cracks or gaps 

  • Discoloration

  • Water stains on the ceiling or walls inside

  • Missing shingles

If you have a vented roof ridge, you may also need repair or replacement if you have sudden issues with indoor humidity.

The roof overhang, also known as the eaves, does count as part of the roof’s square footage because it must be covered with the roofing material. The overhang is one of the reasons why you can’t base your roof's square footage on the square footage of the house. The roof square footage must also account for the pitch of the roof as well as the eaves.

Yes, a roof blister can cause a leak if it gets to the point where it pops. Prior to popping, a roof blister is just an aesthetic issue, but once it pops, you’re left with a small hole in the shingle. Water from rain and snow can easily get inside this hole and interact with your underlayment, roof decking, and the building material below.

The number of snow guards you’ll need on your roof depends on factors like the type of roof you have, its slope, the orientation of your home, and the snow load in your area. A local roofing professional or the snow guard manufacturer can help you determine the ideal amount.

The four types of roof sheathing are plywood, oriented strand board (OSB), planks, and tone-and-groove boards. The overwhelming majority of homes use the first two (especially OSB) and the other two are not often seen outside of special use cases. Methods of sheathing include solid sheathing, open sheathing where there are gaps, and plank sheathing. Most roofs are solid sheathing.