VAPOR BARRIER

A vapor barrier is a heavy-duty plastic or polyethylene sheet installed on the floor (and sometimes walls) of your crawl space to block moisture from the ground, helping prevent mold, wood rot, and structural damage. 

Crawl spaces naturally collect moisture from the ground. A vapor barrier protects your home by preventing moisture from rising, which can lead to mold, mildew, unpleasant odors, wood decay, and higher energy costs. 

Small DIY projects are possible, but professional installation ensures proper sealing, correct material thickness, and long-term effectiveness, especially for larger or moisture-prone crawl spaces. 

With quality materials and proper installation, a vapor barrier can last 10–20 years or longer. Regular inspections help ensure it stays intact. 

No. A vapor barrier prevents future moisture problems, but existing mold must be removed through professional mold remediation before installation. 

By reducing ground moisture and humidity, a vapor barrier helps maintain more consistent temperatures in your home, reducing the workload on your heating and cooling systems. 

Costs vary based on crawl space size, material quality, and any prep work needed. Many companies offer free estimates to provide an accurate quote. 

It’s recommended to inspect your crawl space and vapor barrier at least once a year, especially after heavy rain or snow melts, to catch tears or damage early. 

No, a vapor barrier prevents moisture from seeping up from the ground but does not stop standing water from leaks, broken pipes, or surface flooding. Additional water management systems may be needed for those issues.