The Anatomy of a Roof

The roof of each home and commercial space serves an important purpose. You might not think about your roof very often, but you will certainly start to if you’re dealing with roof leaks or areas of your roof that are no longer secure.

When your roof needs service or replacement, you want to be an informed consumer so that you can make wise decisions. Although thankfully you don’t have to be a roofing expert, you can read on to discover the basic parts of a roof and their functions.


Although this part of the roof is usually out of your sight, the rafters are the skeleton that the rest of the roof is built upon. Made of wood, the rafters provide an important framework, so they must be installed correctly. 

Typically, the rafters are installed in pairs that are nailed on opposite sides of the roof’s ridge. Roofing professionals know that tight, carefully measured alignment is the key to success when installing rafters.


The sheathing is made up of decking boards made of wood or plywood. They are nailed to the rafters to provide an additional foundation for the structure of the roof.

Roofing Underlayments

When it comes to roofing, moisture is the enemy! In fact, the main purpose of a roof is to keep water that’s on the outside from entering into your home.

The underlayment is installed over the roof deck but under the shingles. In the past, felt `was the most common underlayment choice, and it is still used by many roofers today. However, synthetic materials continue to increase in popularity due to their durability and moisture-resisting properties.

Outer Covering

The outer covering is the part of the roof that you see when you look at your home from the outside. Asphalt shingles are the most common outer covering for roofs, and they come in a huge variety of types, styles, sizes, and colors. You can change the look of your home drastically by changing your shingles. Other common outer coverings are clay tiles, concrete tiles, and metal roofs.


Flashings are used to prevent leaks on roofs that are at various levels and angles. They seal gaps to keep the roof watertight, especially in roofs with numerous angles and slopes.


The type, size, style, and design of your home will determine which roofing strategy is necessary to create a roof that is sturdy and stable. Since roof designs vary greatly, it’s wise to work with a professional roofing company that you can trust. Look for a service that has a reputation for excellence in your area. For more information or if you have any questions, ask our roofing professionals! You may do so here.