If you’re considering replacing your roof, you may have been wondering what goes under shingles. There are several components that go under your roof, including the Ice and water shield, Underlayment, Felt paper, Tar paper, and the shingles themselves. Before you get started, make sure you understand what each one does. Listed below are the main components of a roofing system. Listed in order of importance:

What Goes Under Shingles on a Roof?


Underlayment helps shingles lay flat and level on the roof. While shingles are often installed directly over the roofing felt, sometimes slight imperfections cause them to set up or sink. Underlayment is a necessary step in roofing because it allows shingles to bind to a smooth surface and prevent any abnormalities. Listed below are some benefits of underlayment. Read on to learn more. After a roof is properly installed, the next step is to install shingles.

Roof underlayment protects the wood underneath shingles from water and other weather elements. In severe weather, it will keep the shingles in place. When you replace your roof, you should consider installing underlayment. This material can be found at home improvement centers and roofing supply companies. A good underlayment should be a minimum 2 inches thick and be made from a reliable brand. In addition, the roof should be protected against wind and rain.

Another type of underlayment is called roofing felt. It is similar to tar paper and has a waterproofing element. It was once the only underlayment, but dwindling supplies of asphalt forced homeowners to use other materials. It also adds stiffness to the roof deck, which makes it more resilient to impact. It is also considered to be worth the extra cost, as it will ensure a longer-lasting and stronger roof.

Underlayment is an essential part of roof installation. While a roof is topped with shingles, it still needs an underlayment to protect it. Among the options for underlayment are asphalt-saturated felt, rubberized asphalt, and tar paper. Choosing the right one for your roof depends on the type of roof. You should research the pros and cons of each before you make the final decision.

Ice and water shield

An ice and water shield is a thin rubberized asphalt membrane that goes under shingles on a roof. This underlayment helps protect homes from water leaks and wind-driven rain. Ice and water shield is required by Minnesota building code. You can find it at most home improvement stores. Here are some tips for installing this material:

When installing ice and water shield on a roof, make sure to install it along the drip edge and around the perimeter of the shingles. The roofing felt should overlap the previous row by about three inches, which accounts for the flow of water. If you’re not comfortable with heights, you can always hire an experienced roofer. The installation process may be tedious, but it’s worth it to enjoy the added peace of mind that comes with an ice and water shield for many years.

When installing an ice and water shield on your roof, make sure to install it in the vulnerable areas like the valleys and penetrations. You can also use it as a whole-roof underlayment for additional protection. It protects your roof from wind driven rain and ice dams, as well as leaking. It’s a great choice for both commercial and residential roofs, as it’s flexible and will fit the roof’s pitch and slope.

If you’re unsure what underlayment you need to install on your roof, GRACE ICE & WATER SHIELD(r) is a proven waterproofing underlayment with a 35-year track record. This product also features a slip-resistant surface to make the installation process safer for the applicator. The company offers a warranty for this product. If you need an underlayment, contact an installer today to learn more about how it works.

Felt paper

The process of installing felt is fairly straightforward. First, you need to roll out the sheet of felt, aligning it with the rake so that it overlaps the lower edge of the shingles. Next, drive five nails through the first course of felt. Once the first course of felt is in place, lay out the second course. It’s important to overlap the first course by 2 inches, as moisture will flow over the layers of felt.

Felt paper is less expensive than synthetic underlayment. This makes it the preferred choice for shingle roofing projects, but it does not last as long as a synthetic one. While synthetic underlayment has warranties, felt paper is usually only warranted for the life of the shingle roof. Felt underlayment will break down over time, especially if exposed to high heat or frequent temperature fluctuations.

Felt paper is installed between the roofing material and the deck of the roof. It is made from natural or synthetic fibers and is a protective barrier between the two. It repels water while allowing the roof to breathe. In some applications, felt paper is required by building codes or manufacturer warranties. The best way to determine if felt paper is required is to ask your roofing contractor about the process.

Roofing felt is made from two or three layers of felt-paper. It is a mixture of two types of fibers – one made from paper felt and the other from asbestos. Asbestos-containing roofing felt is prohibited, so be sure to dispose of it properly. A roofing company can handle all types of roofing projects. Just make sure to find a roofing company that has experience in your area.

Tar paper

A lot of people may wonder what tar paper is and how to properly install it on a roof. Tar paper is a common roofing material that is used as an underlayment under shingles and other roofing materials. This material is not sun and wind-resistant, but it provides several benefits. It comes in various weights and widths, and is often marked with chalk lines for a precise layout and proper overlap.

When installing tar paper on a roof, make sure to measure the length of your roof. Since tar paper rolls do not always run the full length of your roof, make sure to overlap the seams about 5 inches and alternate between layers as you go. Also, when laying the tar paper, make sure to space out the nails evenly and don’t line them up like you would with a hardwood roof. To protect your roof from damage, use a roof harness when installing tar paper on a steep roof.

Roofing felt is another common roofing material. It provides a waterproof membrane underneath shingles and ensures a clean installation. Tar paper is the most common type of roofing felt. Tar paper is a base material made of wood cellulose, which is then coated with asphalt or bitumen. It serves as your home’s last defense against the elements. In addition, tar paper is made of non-organic materials and has anti-fungal properties.

Besides tar paper, roofing felt is another material used as underlayment. It is similar to tar paper, but contains an ingredient called asphalt that acts as a waterproofing agent. Until recently, asphalt-saturated felt was the most common type of underlayment, but dwindling supplies forced manufacturers to use other materials instead. It also adds stiffness to the roof deck, improving its ability to resist impact.


A sagging roof is an obvious sign that the sheathing under the shingles is compromised. To determine if your roof’s sheathing needs replacement, you can go to the attic and look for dark patches. Press hard on these areas, as rotten wood will give easily. If you find any of these areas, you should schedule a roof repair or replacement right away. There are several ways to check if your sheathing needs to be replaced.

Sheathing is a layer of boards that goes under the shingles on a roof. It provides a solid surface for other roofing components, such as shingles. This material is also known as roof decking. Oriented strand board (OSB) is manufactured by hotly compressing thin strands of wood to form a tight bond. The resulting plywood or OSB is very strong and durable and is therefore the preferred material for roof decking.

Despite the fact that the majority of houses are built of shingles, sheathing is an essential component of any roof. Although shingles offer important protection to homes, they can become damaged if water penetrates them. For this reason, sheathing is a crucial part of a roof. It provides a solid base to attach the shingles and evenly distributes the weight. Sheathing prevents water from destroying the shingles and prevents leaks.

Plywood is the most durable material for roof sheathing. Usually, plywood is 4 feet by 8 feet. Another popular choice is OSB, which is made of several layers of wood pressed together. Both materials are sturdy and durable, but OSB is lighter and is more affordable than OSB. When choosing a sheathing material, take into account the climate of your house and the area in which you want to put it.