Crawl Space Encapsulation
A damp crawl space affects your entire home. A-Proseal seals and encapsulates crawl spaces across Chicagoland with vapor barriers, drainage, and dehumidifiers that stop moisture, mold, and pests for good.
Your Crawl Space Affects Your Entire Home
Most people never think about their crawl space. But up to 40% of the air you breathe on your first floor comes from below. If your crawl space is damp, moldy, or full of moisture, that bad air rises right into your living areas. This can cause musty smells, allergy problems, and even damage to your floors and support beams.
Chicago weather makes crawl space problems worse. Heavy rain pushes groundwater under your home. Summer humidity fills the space with moisture that sticks to everything. Winter freeze-thaw cycles crack vents and openings. Without protection, your crawl space becomes a breeding ground for mold, wood rot, and pests.
Crawl space encapsulation solves all of these problems at once. We seal the entire space with a thick vapor barrier, close off vents, and install drainage and dehumidifiers to keep moisture out for good. The result is a clean, dry space under your home that protects your air quality, saves energy, and stops structural damage before it starts.
A-Proseal has been encapsulating crawl spaces across Chicagoland since 2000. Our team handles every part of the job, from inspection to installation. We never use subcontractors, and every project comes with a written warranty.
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Signs Your Crawl Space Needs Encapsulation
If you notice any of these problems, moisture is likely damaging your crawl space right now. Call us for a free inspection.
How We Seal Your Crawl Space
Full Crawl Space Inspection
We crawl through your entire space and check for moisture, mold, wood damage, pest activity, and drainage problems. We measure humidity levels and look at every support beam and joist. You get an honest assessment with photos so you can see exactly what we found.
Fix Moisture Sources
Before we seal anything, we fix the root cause. If water is pooling, we install a drainage system and sump pump. We seal foundation cracks and close off open vents that let in outside moisture. This makes sure the encapsulation works the way it should.
Vapor Barrier Installation
We lay a thick 20-mil vapor barrier across the entire floor and up the walls. Every seam is sealed tight. The barrier stops ground moisture from rising into the space. This single layer creates a massive difference in humidity and air quality throughout your home.
Dehumidifier and Final Check
We install a commercial-grade dehumidifier that runs automatically to keep humidity below 50%. We do a final walkthrough, test every seal, and make sure everything meets our standards. You get a written warranty and peace of mind that your crawl space is protected.
What You Get With Our Crawl Space Encapsulation
20-Mil Vapor Barrier
We use a thick, heavy-duty barrier that covers your entire crawl space floor and walls. It blocks ground moisture from rising into the space and is built to last for decades without tearing or breaking down.
Crawl Space Drainage
If water collects under your home, we install interior drainage with a sump pump to move it out. This keeps your crawl space dry even during heavy Chicago rainstorms and spring snowmelt.
Dehumidifier Installation
A commercial-grade dehumidifier runs automatically to keep humidity under control. It pulls moisture from the air all year round, which stops mold growth and protects your wood framing.
Vent Sealing
Open crawl space vents let in hot, humid air in summer and cold, freezing air in winter. We seal every vent and opening to keep the outside weather out and your conditioned air in.
Insulation Upgrade
We can add or replace crawl space insulation to help control temperatures and lower energy costs. Proper insulation works together with the vapor barrier to make your whole home more comfortable.
Written Warranty
Every encapsulation project comes with a written warranty. If anything we installed ever has a problem, we come back and fix it at no extra cost. You can also transfer the warranty when you sell your home.
Why Chicago Homeowners Trust A-Proseal
Your crawl space is the foundation of a healthy home. You need a team that does the job right, uses the best materials, and stands behind their work every time.
Crawl Space Questions Chicago Homeowners Ask
Encapsulation means sealing your entire crawl space with a thick vapor barrier. The barrier covers the floor and walls to block moisture from the ground. We also seal vents and add a dehumidifier to keep the air dry. The goal is to turn your crawl space from a damp, dirty area into a clean, controlled space that protects your whole home.
Most crawl space projects take one to three days. The exact time depends on the size of your crawl space and how much prep work is needed. If we need to install drainage or a sump pump first, it may add a day. Our team works efficiently and cleans up before we leave.
Yes. Mold needs moisture to grow. By sealing your crawl space and controlling humidity with a dehumidifier, we remove the conditions that mold needs. Existing mold stops spreading, and new mold cannot take hold. Many homeowners notice that musty smells disappear within days of encapsulation.
Yes. An open crawl space lets outside air flow under your home. In summer, hot humid air makes your AC work harder. In winter, cold air chills your floors and raises heating costs. Sealing and insulating the crawl space stops this air exchange and can make a real difference on your monthly bills.
In most Chicago homes, yes. Even with a vapor barrier in place, some moisture can still enter through the walls or during heavy rain events. A dehumidifier keeps humidity below 50% at all times, which is the level where mold and wood rot cannot develop. It runs automatically and requires very little maintenance.
Yes. Old building codes required open vents, but modern research shows that open vents actually make moisture problems worse. In summer, warm humid air enters through vents and condenses on cooler surfaces inside. In winter, open vents let freezing air in and can cause pipes to burst. Sealing vents is a key part of proper encapsulation.
Other Services You Might Need
Sump Pump Installation
A reliable sump pump keeps water out of your crawl space and basement. We install primary pumps and battery backup systems for around-the-clock protection.
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Interior Drain Tile
Drain tile systems catch water at your foundation footer and route it to a sump pump before it reaches your floor. The best defense against basement flooding.
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Basement Waterproofing
Keep your entire basement dry with drain tile, sump pumps, crack repair, and wall barriers. We build a complete system that stops water for good.
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