Roofing Layers: Why Are They Important For A House

Why Are They Important For A House

Owning a home is not all about paying mortgages. You need to understand how the roof works to protect your home. The roofing of your home keeps the rain out. It also helps regulate temperatures, humidity, and energy consumption.

The roof has several layers to provide a protective barrier against extreme weather conditions and temperature changes. As a homeowner, you need to understand why these layers are necessary. You can pick the right one when repairing or replacing the roof.

In this post, you will learn about the various roofing layers and their significance to your home. Let us get started.

1. Underlayment

The underlayment is a protective layer installed between the deck and shingles. It prevents the shingles from leaking and protects them during windstorms. It also helps enhance the overall look of your home’s exterior while preventing heat loss in colder climates.

This layer is usually either asphalt-impregnated felt or fiberglass mesh. You roll it out before placing down a layer of shingles. Understanding roofing layers is vital to avoid mixing things up. The felt is ideal for protecting against leaks, and, over time, you can expect it to swell up when exposed to moisture.

Fiberglass mesh underlayments are more expensive than felt, but they offer a higher resistance to tearing and punctures that may lead to leaks. They also provide better results in colder climates since fiberglass mesh underlayments are more resistant to heat loss.

The choice of the appropriate underlayment is vital for your home’s roofing system. It can help prevent leaks, water damage, and energy leakage during extreme weather conditions. However, you should consult with a professional before making your final decisions on what type of underlayment you purchase.

2. Roof Deck

The roof deck lies between the water barrier and ventilation. There are different types of roof decks to choose from, including wood, plywood, and metal. What you pick for your home depends on location and how much weight it has to support.

Metal roofs provide excellent protection against fire hazards, but they are a bit expensive. Wood decks are great for protection against water damage, but they are more prone to rotting and warping. Plywood decks are ideal for homeowners living in colder climates since it has several layers that do not warp easily with temperature changes.

3. The Shingles

Shingles are the most visible part of any roofing material. They are usually of asphalt or fiberglass materials, and they come in different colors to match your home’s exterior perfectly. The best thing about shingles is that they are durable enough to withstand the changing weather elements for years before requiring replacement.

Shingles have a unique design depending on the type of material. For instance, asphalt shingles have three different layers that work together to protect the home from water damage and harsh weather conditions. These layers include the base mat, fiberglass reinforcement layer, and an asphalt coating for waterproofing purposes.

Fiberglass shingles are more expensive than traditional asphalt ones, but they are durable and do not warp easily. They are also resistant to heat and fire, which is why they work perfectly for homeowners living in hotter climates.

4. The Insulation

This layer consists of a low to medium-density material installed between the roof deck and shingles. It helps prevent heat loss during winter, which reduces your energy bills significantly.

5. Flashing

You install the flashing beneath the roof deck, around openings such as vents and chimneys. It helps prevent leaks in these areas by sealing them wholly from water and moisture.

Flashing can be either galvanized steel or aluminum, depending on your preference. The choice between the two materials mostly comes down to the costs and the frequency of exposure to water.

Although Aluminum flashing is more expensive, it offers higher corrosion resistance than galvanized steel, making it more preferable.

6. Ridge Vents

The vent allows air to escape from the attic, which prevents pressure build-up under your roof deck. It also releases moisture into the atmosphere to protect against the dampening of other roofing materials. The ridge vent lies along the peak of your home’s roof.

There are several types of ridge vents available for homeowners, including PVCs and aluminum. The type you choose depends on your preference, but the significant thing to remember is that it should be compatible with your roofing materials.

7. Water Barrier

The water barrier is the layer you install right below the roof deck. It usually consists of a thick sheet material that prevents water from seeping through to your home. You will need this layer if you live in places prone to wind-driven rain and snow.

The water barrier consists of asphalt rolled roofing, rubber membranes, and polyethylene sheets, among others, depending on your preference. Wooden water barriers are also available, but they are preferable for light applications only.

8. The Ventilation

The ventilation layer lies beneath the water barrier and consists of tubes that allow air to flow through. It helps prevent ice dams and condensation by allowing the warm air to flow beneath your roof deck.


The roofing layers work together to provide a strong barrier that protects your home from harsh weather elements. The type of material you choose depends on the layer and your preference. Be sure to pick materials that can withstand extreme weather conditions without breaking the bank. Understand the typical weather in your location before the purchase.

Author’s Bio –

Crystal Willson is a full-time content marketing specialist. She has been closely monitoring the various industry trends for quite some time. She has worked in various domains and written many informative blogs on different verticals. She has also worked with the Best Roofing Company. On her off days, she likes to spend time with her family, lift weights, and reading novels.