what layers go on a  New Roof​What Are the Layers of a New Roof?

A Complete Guide for Portland, OR Homeowners

If you’re a homeowner in Portland, OR, and you’re thinking of replacing your existing roof or installing a new one, you might be asking what layers go on a new roof. A new roof is a substantial investment, and it is critical to understand the various levels and their roles in order to make an informed selection.

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This article will go through the many layers that make up a new roof and their significance. We’ll also provide you some pointers on how to pick the best roofing materials for your property.

1. Roof Deck

The roof deck is the base of the roof and the first layer installed on a new roof. It is often built of plywood or oriented strand board (OSB) and offers a level, even surface for the other roof layers.

2. Underlayment

The underlayment is a water-resistant layer that sits on top of the roof deck. It is often constructed of asphalt-saturated felt or synthetic materials such as fiberglass or polyester. The underlayment functions as an additional barrier against water and aids in the prevention of leaks.

3. Ice and Water Shield

Ice and water shield is an important layer that goes on a new roof in colder areas such as Portland, OR. It’s a self-adhering membrane that goes over the underlayment and adds an extra layer of protection against ice dams and water intrusion.

4. flashing

Flashing is a metal coating that goes around the edges of the roof and other susceptible locations such as chimneys, skylights, and vents. It is intended to keep water out of the areas where the roof joins other components of the home.

5. Shingles or Other Roofing Material

The shingles or other roofing material are the last layer installed on a new roof. Shingles are the most prevalent roofing material and available in a range of designs, colors, and materials, such as asphalt, wood, metal, and slate. Alternative roofing materials include tiles, shakes, and synthetic materials such as rubber or plastic.

Selecting the Best Roofing Materials for Your House

There are various aspects to consider while selecting the best roofing materials for your home. These are a few examples:

1. Climate: Because Portland, Oregon, has a moderate, wet climate, you’ll want to use roofing materials that can tolerate moisture and high winds.

2. Style: Because your roof is an important aspect of your house’s outward appeal, you should pick roofing materials that suit the design and architecture of your home.

3. Budget: Because roofing materials come in a variety of prices, you’ll want to select materials that are affordable while still giving the necessary protection and durability.

4. Maintenance: Because certain roofing materials need more maintenance than others, you should select materials that suit your lifestyle and maintenance preferences.


A new roof is a substantial investment; therefore, it’s critical to comprehend the many layers that comprise a new roof and their significance. In Portland, OR, where the environment may be wet and windy, choosing roofing materials that can endure moisture and high winds is extremely crucial.

You can pick the correct roofing materials for your house and guarantee your roof offers the protection and durability you need for years to come by knowing the numerous layers that make up a new roof and considering considerations such as climate, style, budget, and upkeep.


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