What Are the Best Ways to Remove All Water from a Boat Hull?

Written by chris moore
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What Are the Best Ways to Remove All Water from a Boat Hull?
The foam inside a boat's hull can become waterlogged. (Thinkstock/Comstock/Getty Images)

Certain boats experience recurring problems with water getting trapped inside the boat. The biggest problem is the water soaking into the foam within the boat hull, which can make the boat heavier and eventually rot the components within the boat. The best method for removing water from within a boat's hull depends largely on how much there is and where you're located.


The simplest way to remove water from the hull in some cases is to drain the boat of the water. This will especially work if the point of entry is large enough; you'll just need to tip over the boat in an area in which you can pour the water onto, such as a sloped driveway. You may need to drill holes in the hull in the location of the water if the entry point isn't large enough. Due to possible contamination in the water, don't pour it on grass and any other area with plants. Once the water is drained, patch the holes and/or open spot in the hull.


The water can evaporate out of the boat eventually, especially if the point of entry, once again, is large enough. This will take much longer than any other methods, and it also requires very warm and dry conditions to be effective. People who live in the southwestern United States will have an easier time drying boats out this way. Another downside is that the best time of year for the boat to evaporate -- the hot summer months -- is also among the primary boating seasons.


You may be able to vacuum the water out of the hull. With a large enough hole, insert an appropriate vacuum pump into the hull and suck the water out. Make sure your pump is connected to a container large enough to store all the water -- the types of available containers vary depending on the pump -- or else you will need to make several extractions while disposing the water. You may not get all the water out this way, but it can help speed up the process in conjunction with evaporation or pouring.

Foam Removal

If the boat is excessively waterlogged, especially to the point where the foam is damaged, you may need to just remove and replace the foam. This will likely require you to remove the outside of the hull using a pry bar or similar tool. You may only need to cut out the wet pieces of foam with a knife and keep the rest intact, replacing only the smaller pieces. Otherwise, you may be better off replacing all the foam with wood stringers on the hull since you may never find replacement foam with the correct density.

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