I'm dealing with a persistent smell in my crawlspace (2450 sqft) that seems to be linked to high humidity (over 70%). I've received seven different quotes for dealing with this issue, and it's incredibly frustrating since the estimates vary widely. Some options include full encapsulation versus just replacing the vapor barrier, adding a dehumidifier versus letting my HVAC handle cooling, and options for replacing insulation or keeping what I currently have. The quotes I received range from $7,000 for a dehumidifier, barrier, and insulation to $17,600 for a comprehensive encapsulation including a dehumidifier. Each contractor has given me different advice, which is confusing. While I understand a dehumidifier may be the best for humidity control, it also requires maintenance. On the other hand, using my HVAC system raises concerns about stress on the system since it doesn't know the humidity levels below. I'm leaning towards accepting a $12,600 quote for full encapsulation and a dehumidifier, but I'm curious about opinions on other options that might be cheaper but still effective.
2 Answers
If you’re in a flood-prone area, double-check with your insurance agent before signing any contracts. You want to make sure your plans won't mess with your flood insurance requirements.
Wait, how could encapsulating the crawlspace mess with flood insurance?
Full encapsulation should really be your last resort. First, make sure you have a solid ground covering with plastic and that all external grading is diverting water away from your foundation. You can monitor the humidity with a wireless sensor. If things get too humid, try closing off vents and using a good household dehumidifier that drains outside. You don’t need to splash out on a high-end model. You should mainly need it during the summer months. Run plastic up the walls and piers, seal everything tight, and keep monitoring. If humidity continues to be an issue, then consider full encapsulation combined with another dehumidifier.
Yeah, going step by step can end up costing more if you have to end up doing the full setup later. If you commit to encapsulation now, it might save you money in the long run.
I don’t think I’m in a flood zone, but I’ll definitely ask my agent just to be safe!