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Average Cost to Seal a Deck

Installing a wooden deck is a major addition to any home. Along with extending the livable space on your property, it can be the ultimate place to kick back in the summer or serve as the location for a party. Having a deck, however, comes with some responsibility. Wooden decks need to be sealed at least once per year in order to prevent damage to the wood, protect against the climate and remain attractive. Discover how much it costs to hire professionals to seal a deck, and then find out whether it might make a good DIY project.

National Seal a Deck Costs

Cost data is based on actual project costs as reported by ImproveNet members.

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Average reported cost

based on 4631 cost profiles


Minimum cost


Maximum cost

Most homeowners spent between:




National Seal a Deck Costs
Average reported cost $752
Number of Cost Profiles 4631 cost profiles
Minimum reported cost $60
Maximum reported cost $1,500
Most homeowners spent between: $591 to $840

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Average Cost of Professionally Sealing a Deck

Because sealing a deck doesn't require a lot in terms of equipment or large commercial machines, many individuals assume that it will be affordable to hire professionals to do the job. However, sealing a deck requires a lot of labor, and it can take as many as two full days to complete the task. Expect to pay anywhere from $960 to $1,345 to have your deck professionally sealed. 

Factors Affecting the Total Cost of the Project

It is important to remember that no two jobs will be the same, and even similar jobs can have different prices attached depending on where you are in the country and what season it is. Just before summer, more homeowners decide to seal their decks, which can drive the price up. The size of your deck, how long it has been since your last seal and the quality of the materials used are all things that can play a role in the total cost of the project.

Choosing the Right Type of Sealant for Your Deck

The kind of deck you have in place can help you to determine which kind of sealant will be best for the space. There are two major options to choose from, and these are oil-based sealants and water-based sealants. Water-based options last slightly less time overall, but they are better for the environment. You can also choose to have professionals apply clear sealants to allow for natural greying over time, toners for a slight color change or a solid paint that hides the grain and the natural color of the wood.

Last updated on Mar 31, 2016

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