HomeCare 101: How Much To Replace Water Damaged Roof Decking

It’s crucial to know how much to replace water damaged roof decking, especially since it is that part of a house that you usually don’t see or even go to unless there’s a problem with it. The estimated cost for this repair job is around $700 to $2900.

A roof is more than just the interlocking tiles you see outside. It is the foundation of your roofing system that protects the users from external disturbances.

how much to replace water damaged roof decking

Even though these things are built to last for several years, factors like water damages can cut the lifespan of your roof. Keep reading to know more about what makes the replacement cost for roof decking so costly and how to save as much cash as you can.


What Is Roof Decking?

Roof decking or “roof sheathing” is a part of your roofing system that comprises wooden boards to help the other structural components of your roof stay in place. It serves as a foundation that holds the major parts of your roof. Having great roof decking improves ventilation and ensures the structural integrity of your home.

There are different kinds of roof decking materials to consider when planning a reinstallation of new sheets. The interlocked wood in plywood material makes it one of the popular choices for roof decking replacements. Since plywood is dense, there’s less chance for rot caused by moisture or water.

Another material to consider is the Oriented Strand Board (OSB), a common choice since the ‘70s. It is made with interwoven strands of wood with waterproof resin to protect against water damages. Lastly, concrete is also used in roof decking for commercial buildings and is more environmentally friendly than the two.


Elements That May Affect The Cost Of Repair 


The size of the deck

The bigger your deck is, the more expensive it’s going to be to replace it. It would be best to measure how big the affected area needs replacing first.

Doing this will help you have an estimated price in mind and prepare enough money for that when you decide to reinstall your roof decking. If you have a deck under 50 square feet, both labor and materials cost is around $1000.


Materials you’re going to use

The materials you’re going to use are also a major factor that affects the total repair cost. If you’re planning to use wood, each sheet could cost you around $70 to $100. Fortunately for you, most roofing companies offer materials, so you won’t have to look for them yourself.

Please talk with your roofer to get the best deal possible without compromising the quality of the materials and service itself. Also, learn to detect water damaged wood so you’ll know the difference between good quality and torn down materials.


Upgrade requests

Now that you’re planning to fix your water damaged roof decking, you could also upgrade other parts of your roofing system while you’re at it. Ventilation upgrades such as adding air vents can cost you between $300 to $500, labor and materials included.

This can also be an excellent time to check your shingles and see if they need some upgrading. Doing these upgrades can make a sturdier home and can also increase its market value.


Professional services 

Hiring a professional roofer can also affect the cost of your roof decking replacement. Most people can’t DIY this, and it would be best to hire a company to do it for them.

Labor and installation fees can vary depending on how big the area needs replacing and the complexity of the problem. Get in touch with your contractor and discuss the issue to get a quote on how much it will take to replace your roof decking.


When To Replace Your Roof Decking?

Roof decking can survive for 20 to 25 years in dry places, but it can cut down to half if you live somewhere in a humid environment. You will know that you need to reinstall the new roof decking when the rot on your old one has done extensive damage already. However, how would you do that when roof decking is made to be hidden?

You can ask help from a professional inspector to check whether your roof deck has any problems. Other indications that your roof decking needs replacing are when you see some holes in your roof, along with some stain and mold growth in your ceiling.

If you need to fix plaster ceilings, make sure that you’ll do it before replacing your roof decking. You should also check whether there are significant changes in the ventilation.


How To Save Money While Doing This?

Reinstalling your roof decking can be expensive. You’re probably thinking about how you can save some money while doing so. It’s essential to choose a great roofing company to get the best deal within your budget.

Doing this will ensure that you won’t have to encounter problems like this with your roof decking in the future. Another thing that can help you save money is getting high-quality materials. It’s best to invest in suitable materials to ensure an extended lifespan for your roof decking.



A re-roofing operation is not wallet-friendly at all. However, being smart with your money and knowing how much to replace water damaged roof decking is vital in making sure that every bit of your penny is well spent.

The cost depends on the size, materials, labor, and upgrade requests. However, be sure to have a budget of around $2900 at most, just in case.

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