Roof Decking: Understanding the Foundation of Your Roof

Roofing Materials
Roofers installing roof decking before putting the finishing touches on a roof

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    Roof decking is the foundation of your roof. It is the material that covers the roof trusses and supports the shingles or other roofing materials. Decking is usually made of plywood or OSB (oriented strand board) and is available in different thicknesses. The type of roof decking you possess determines the lifespan and durability of your roof.

    Benefits of the roof decking

    There are many benefits to roof decking, and understanding your roof’s foundation can help you decide if this is the right option for your home. Roof decking provides an extra layer of protection against the elements, helping to extend the life of your roof. It also aids in insulating your home, keeping it more relaxed in the summer and warmer in the winter.

    Types of roof decking

    Several types of roof decking can be used to construct a roof. The type of decking you use will depend on the climate, the size and weight of the shingle material that is to be used, and the type of roofing foundation you have.

    The most common type of roof decking is made from plywood. Plywood is a robust and durable material that can withstand heavy loads and resist rot and insect damage. It is also relatively cheap to purchase and easy to install. However, plywood is not as fire-resistant as some other types of decking, and high winds can damage it.

    Another popular type of roof decking is made from fiberglass. Fiberglass is a lightweight material that is resistant to fire and rot. It is also easy to install but more expensive than plywood.

    Metal roof decking is also an option for some roofs. Metal roof decking is solid and durable, but it is also costly. High winds can also damage metal roof decking.

    How to install roof decking

    One of the most important foundation pieces of your roof is the decking. The decking is what provides the support for the shingles or other roofing material that will cover your home. Installing roof decking properly is crucial to having a well-functioning roof.

    Here are several tips on how to install roof decking:

    1. The first step is to remove any old decking that may be on your roof. This can be done by a trained professional. When removing old decking, wear proper safety gear, such as gloves and goggles.

    2. Once the old decking is removed, you will need to clean the area before installing the new decking. Again, it is good to enlist the help of a professional for this step. Before moving on to the next step, remove all debris, such as nails or screws.

    3. The next step is to install the new decking boards. Be sure to use treated lumber when installing new decking boards, as this will help prevent rot and decay.

    Maintenance tips for roof decking

    The roof decking is the layer that provides a solid foundation for your roof and helps protect your home from weather damage. Thus, It’s essential to keep it in good condition.

    Here are several tips for keeping your roof decking in good condition:

    1. Inspect the decking regularly. Look for any signs of damage, such as cracks, splits, or warped boards. If you see any damage, repair it immediately to prevent further damage.

    2. Make sure the decking is adequately ventilated. Good ventilation helps prevent moisture buildup, leading to mold and mildew growth. Please ensure that vents in the soffits and ridge vent are clear of any obstruction.


    If you’re a homeowner, it’s essential to understand your roof’s foundation. Roof decking is one of the most critical aspects of your roof; if it’s not in good condition, your roof is at risk for severe damage. Thankfully, there are plenty of options for repairing or replacing damaged roof decking, so if you’re concerned about the condition of your roof, don’t hesitate to reach out to a professional such as the experienced roofers at Divided Sky Roofing and Exteriors for help.

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