Crawl Spaces
Vapor Barrier Installation
A vapor barrier is your first line of defense against moisture problems in your crawl space.
Millions of homes were built before building codes caught up to the moisture problems that unsealed crawl spaces cause. Without a barrier between your crawl space and the bare earth beneath it, moisture works its way up — feeding fungus and mold, reducing indoor air quality, damaging insulation, and rusting out appliances located under your home like HVAC units and water heaters.
A vapor barrier seals your crawl space off from the earth, ridding it of moisture and dampness. It prevents moisture from evaporating up into your floor joists and insulation, saving you from the repair costs that follow when it doesn't. It's one of the most effective, most affordable steps you can take to protect your home, increase air quality, and cut down on future repair bills.
What Is a Crawl Space Vapor Barrier?
A crawl space vapor barrier is a heavy-duty liner installed across the floor of the crawl space — often paired with insulation as part of a broader encapsulation approach — that stops water vapor and moisture from reaching your crawlspace framing and foundation. Because standing moisture in a crawl space causes mold and mildew, a properly installed vapor barrier addresses both moisture control and the structural damage that moisture causes over time. It's worth hiring an experienced contractor for this work — it protects one of the biggest investments you have in your home.
Vapor Barrier Options
- 6 mil liner — your first line of defense for maintaining a healthy, moisture-free crawl space.
- 20 mil liner — a durable, puncture-resistant liner with a long-term no-rip/no-tear warranty that also helps block radon gas from entering your crawl space.
- Full encapsulation — pairs the vapor barrier with sealed vents and insulation to lower utility bills, improve indoor air quality, and further reduce moisture content in the space.
Frequently Asked Questions
No — a vapor barrier is the floor liner component. Encapsulation adds sealed vents, wall coverage, and insulation on top of the vapor barrier to turn the whole crawl space into a controlled, conditioned area. A vapor barrier alone is a solid starting point; encapsulation is the complete system.
Our Customers Love Us!
“Rob and his crew are super. I had a very big project to renovate a 130-year old farmhouse. They worked diligently to put in new piers, new girders, and new joists. Then they also help to fix some frames and add subfloor. This allowed me to move on. Really enjoyed working with Rob.”
Jack C.
Mar 2025
“Very professional! They carried out their task while going the extra mile. It was obvious to me that quality is of great importance. They left it better than they found it. I would recommend them to my greatest of friends and family.”
Jerry H.
Feb 2025
“After having some minor flooding issues, we contacted Triangle Reconstruction and they were amazing in their ability to identify the issues and the best way to address it. What was most impressive was the team that came out and did the work. They were probably the most professional and organized crew we've ever seen work on our house. Brian, our rep, and Rob, the owner, regularly checked in on their work and kept us updated on the progress. I hope I never have to deal with flooding issues again, but if I do, I'll call Triangle Reconstruction again.”
Greg M.
Nov 2024
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