How do you decide between a 10 mil versus a 20 mil crawl space vapor barrier? It's kind of like choosing between a lightweight sweater and a thick wool sweater. What are the conditions that surround the situation? Below is a very simplified look at some of the considerations when deciding on a crawl space liner. If you are unsure, speak to someone who is well versed in these liners and can explain the differences to you. (760.597.9298)
Crawl Space Dimensions: What are the dimensions (length, width, height) of your crawl space?
Access Points: How easy is it to access the crawl space? Are there any obstructions or challenges for installation?
Moisture Issues: Have you experienced any moisture or water-related problems in the crawl space, such as leaks or flooding?
Ventilation: Is the crawl space adequately ventilated, or are there issues with humidity and condensation?
Insulation: Is there existing insulation in the crawl space? If so, what type and condition is it in?
Pest Concerns: Have you encountered any pest or rodent infestations in the crawl space?
Foundation Type: What is the foundation material (e.g., concrete, block, pier, beam) in your crawl space?
Current Liner or Cover: Do you have an existing crawl space liner or cover in place, and if so, what is its condition?
Future Use: Do you have any plans to use the crawl space for storage or other purposes?
Budget: What is your budget for a crawl space liner installation?
Things to Consider:
The material used for crawl space liners is of utmost importance when looking at how well the vapor barrier will function. Make sure to select a liner made from high-grade raw materials, such as virgin polyethylene, as opposed to "construction grade films" or C & A films. These plastic sheeting products are made from low-grade resins and post-consumer recycled materials, which will not provide the necessary protection from moisture and gases. While commodity films have their purposes in agriculture and construction sites, they are not suitable for crawl spaces.
With the goal of one and done- One crawl space vapor barrier and never again have to do this job, the crawl space liners that are made from sub-par plastic or C & A poly AKA Visqueen will decay. The life span of a strong crawl space vapor retarder will resist decay and the attacks from moisture, organisms in the soil and chemicals. Weaker films will come apart and degrade over time.
The best bet is to do your homework so you can decide if a lighter 10 mil crawl space liner will do the job, or something heavier such as a 20 mil liner. Knowing that there are certificates/ spec sheets that spell out how the liner is rated will insure you are getting what you are looking for.
If you need further assistance, we hope you will call us at 760.597.9298.
Here's to your beautiful clean crawl space!