Troubleshooting Your Crawl Space Vapor Barrier

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If you have a crawl space vapor barrier in your home, you need to know what to do if it stops working. Once you know what problems to look out for, you should be able to fix them quickly.

Mold Forms on the Flooring

If you have a wooden floor above your crawl space, mold could be growing in between the joints in the floor. This can be caused by two different problems. The first problem is that the vapor barrier has not been properly sealed. If that is the case, it needs to be fixed quickly to prevent moisture from building up around the entire crawl space.

The second problem is that there is dirt on the surface of your crawl space. This dirt could easily contain mold spores. The best way to solve this problem is to clean your flooring thoroughly and then add a layer of mold killer to ensure that there is no re-growth.

Moisture Forms on the Vapor Barrier

There may be small puddles of water on the surface of the vapor barrier, particularly during cold weather. Water in the air is warmed through the use of central heating units and then falls to the lowest point in the room. Your central heating may run along the floors of the room above your crawl space, which can cause moisture to form on the surface. Fix this problem by better insulating your central heating pipework and keeping the crawl space atmosphere suitably dry.

The Vapor Barrier Stops Working

Check the fitting around the edges of the crawl space and look for tears or holes. The vapor barrier can sometimes move away from the wall over time. If that happens, add extra nails to the sides. Remember to caulk around the edges to ensure that you get a good seal. Fix holes in the middle by applying a layer of duct tape or plumbers tape to the top of the hole.

This guide will help you trouble shoot your crawl space vapor barrier. You should be good to go again in no time!