Your Guide To Waterproofing A Crawl Space With Either Plastic Or A Sealant

Posted on: 27 February 2017

If you are aware of the problems associated with a damp crawl space or if your area is particularly prone to wet ground, it is important for you to learn about two of the more common methods for waterproofing that area. However, your attempts will only provide long-term benefits when any mildew, mold or existing pools of water from the area have been removed from the space in question. Once that has occurred, you can use waterproof glue to attach heavy sheets of plastic to the walls and floor or apply multiple layers of an appropriate sealant to those areas. Therefore, it will behoove you to be aware of the following techniques for waterproofing your crawl space when you are unsure as to how you should do so.  

Applying Plastic Sheets To The Interior Of The Crawl Space

Plastic sheets are an easy way to waterproof the crawl space. An extra benefit is that is not hard to figure out when the sheets need to placed back into their original position or when it is time to replace it entirely.

However, plastic sheets are usually only appropriate for the floor and walls of your crawl space. That is because it is rarely sufficient by itself to catch all of the water that might enter the area from above. 

Sealing The Area With A Low-scent, Waterproof Paint Several Times

If you know that some or all of the water entering the crawl space is doing so through its sealing, the use of a sealant is a good choice. Because the area in question is usually small, it is important to choose a sealant that doesn't causes fumes or provides low fumes. Regardless of the specifications of the sealant you use, it is best to provide as much ventilation to the area as you can, using fans, open doors, etc. to minimize the side effects you might experience.    

You should expect to apply at least two coats and perhaps even more of the sealant to every inch of the crawl space. In addition, the coats need to dry entirely between applications and if you see any bubbles forming during the process, you should consider popping them, removing the injured sealant and then immediately painting them over. By doing so, it is often possible to prevent the development of weak spots within the sealant.  

Opting For Both Plastic Sheets And Sealants

If you want the extra security that comes from using more than one way to prevent water from making its home in your crawl space, you can use both plastic sheets and sealants. You should obviously start with the layers of sealant and when they are all dry, proceed with the placement of the plastic sheets, making sure to get a close fit.

In addition, you should remember to return and check the crawl periodically to verify that it is still functioning as it should and maintain its waterproof status as needed. 

In conclusion, a wet crawl space can be both unpleasant and unhealthy. As a result, as a responsible homeowner, it is best to consider the facts shared above in order to more effectively waterproof the area. Contact a contractor, like John's Waterproofing, for more help.