Roofing

The Different Layers of a Roof (And Why They're Important)

Many homeowners look at a roof and only think about the shingles. That makes sense, right? Shingles are all you can really see from the street. However, a roofing system is much more complex. Each part of the system contributes to protecting your home from severe weather. Understanding the different layers of a roofing system is crucial to having a successful project and positive experience when hiring a roofing contractor.

Here are the layers of a roof, in order of application (bottom to top):

decking

Decking

Most often made out of plywood, this roof layer is installed over the framing in a typical roof install. It provides structure by tying the trusses and joists together. You can usually see the underside of plywood decking from the attic.

ice/water barrier

Ice/Water Barrier

This self-adhering, water-proof, and self-sealing membrane is applied to the roof deck. It is designed to protect against water infiltration from ice buildup or wind-driven rain.

flashing

Flashing

This thin material is used to direct water away from where the chimney or siding elements and roof elements intersect. Flashing is usually made of metal, such as galvanized steel, aluminum, or copper. It tends to fail before the shingles do, and should be inspected regularly to make sure your home has a watertight seal.

starter strip

Starter strip

These specialized shingles line every edge of your home’s roof. They are installed after roof decking and before underlayment. Their purpose is to seal the edge of your roof, significantly increasing the roof’s ability to withstand punishing winds and wind-driven rain.

New call-to-action

underlayment

Underlayment

This felt, or rubberized asphalt sheet, provides an extra layer of protection between your shingles and your roof deck. It helps reduce blow-off by allowing your shingles to lay flatter and more uniformly. Additionally, it prevents wind-driven rain from getting under your shingles and causing damage to your roof structure or the inside of your home.

shingles

Shingles

Shingles are the element that most homeowners are familiar with as it is the layer you can see from the outside of your home, and it is an important aesthetic aspect. Asphalt shingles come in two major types, 3-tab and architectural. 3-tabs are less expensive but also less durable, have lower wind resistance, and have a “flatter” appearance. Architectural shingles make up most roof replacements today, as their cost is only marginally more than 3-tab, and they come with far superior specifications and warranties.

ridge caps

Ridge caps

Typical shingles can’t cover ridges well, though, so this specialized extra-long shingle is installed along the ridgeline of a sloped roof. It fits over the joint between these two edges to keep rain and snow out of the home, while also allowing hot air to escape. Ridge caps also finish the look of the roof by creating a tightly sealed joint along the two sides.

We hope you gained a better understanding of the different layers of a roof. When it’s time for your next roofing project, schedule a consultation with one of our roofing experts.

 

left right
Recent Articles
Annapolis Coastal Kitchen Remodel
When Mary and Jon Kuntz became empty nesters, they decided it was time to renovate their 16-year-old kitchen to create their dream space. While the...
Remodeling
Read More
What to Do Before and After A Storm to Keep Your Home Safe
In Maryland, we can see anything from heavy rains that can cause flooding to high winds from hurricanes and tornados. While your personal safety is...
DIY & Homeowner Tips
Read More
MBIA Award: Remodeling and Custom Building Awards of Excellence
We are excited to announce that our complete home remodel of a Baltimore County farmhouse has won the Maryland Building Industry Association's (MBIA)...
Company News
Read More
5 Things You Should Never Hear A Contractor Say
The key to any home improvement project is great communication between the homeowner and the contractor. When you’re working with a contractor, they...
Education
Read More
Step by Step: How a Roof Replacement Works
Knowing what happens at each step of a roof replacement is an excellent way to understand what you are paying for and better communicate with your...
Education
Read More
7 High Tech Solutions for a Smart Bathroom
You’ve probably heard about smart home technology advancements such as automated blinds, lighting controls, and smart outlets. But what about the...
Remodeling
Read More
The Difference Between Flat and Sloped Roofs
It’s easy enough to look up and spot the difference between a flat and a sloped roof. But do you know how these two roof types stack up against each...
Education
Read More
Don’t Void Your Roof’s Warranty: 6 Common Errors to Avoid
A great warranty can be a selling point when choosing your new roof. However, if you ever need to file a claim, you first have to make sure that you...
Education
Read More
6 Home Exterior Mistakes that Could Cost You
Every homeowner wants to keep their house in great shape. And the best way to do that is through regular maintenance. But sometimes, the best of...
Education
Read More