Crawl Space Waterproofing: 3 Important Steps to Follow

A crawl space

Crawl spaces are usually small and enclosed basement areas in a building. Waterproofing your crawl space prevents mold and mildew growing inside your house. When you are researching the best way to make the area watertight, seek expert advice on the options available and the different waterproofing concrete supplies, particularly in the big urban areas like in Sydney.

Here are some tips to make your crawl space waterproofing project successful.

Keep it Dry

Crawl spaces are often confined. Air does not usually go through it, which makes it easier for it to harbour moisture. Moisture from a high water table or leaking pipe leads to mould and mildew, which can be more expensive to remove than the cost of waterproofing.  A temporary measure is to use a dehumidifier to keep the air moisture away, as well as to reduce the crawl space’s air ventilation.

Alternatively, you can also use a polyethylene vapour barrier on your crawl space’s interior walls and attach it to the concrete with a strong duct sealant. Installation in confined spaces can be hazardous and is required to meet strict Australian building regulations.

Drain the Exterior

If the crawl space is prone to flooding, preventative methods include applying a waterproofing agent to the concrete or building a drainage trench. Digging down to the base of the footing, install a perforated plastic tile drainage system around the foundation. Cover the tile using gravel. Fill the last five inches with topsoil and top-off with sods of grass. This will allow floodwater to drain into the sub-soil before causing damage.

Install a Sump Pump

If your crawl space has already collected water and prevention methods have not worked, a sump pump is another option. Direct it away from the house, and make sure the proper piping is securely fixed.

Keeping your crawl space and larger basement areas dry is key to avoiding long term and potential structural problems to a building. After having the problem assessed, consider your options and budget; doing something about the problem now can save bigger headaches in the future.