Crawl Space Insulation & Encapsulation

Name: OTS Chicago Insulation
Address: 1275 Rand Rd, Des Plaines, IL, 60016, US
Telephone: (855) 511-5652

What happens beneath your home affects everything above it — and most homeowners do not find out until the damage is already done.

Most Chicago-area homeowners rarely think about their crawl space — until they notice cold floors in the winter, a musty smell coming from below, or a moisture problem that has already spread. The crawl space sits between your home and the ground, and without proper insulation and sealing, it becomes a direct path for cold air, moisture, and everything that comes with it. We look at what is happening in your specific crawl space and build a plan around what that space actually needs — not a one-size solution applied to every job.

Crawl space work is not just about adding insulation material. It involves understanding where moisture is entering, whether the existing structure shows signs of damage, and which combination of insulation, vapor barrier, and sealing will deliver long-term results. We install insulation on the crawl space walls and floor, apply a heavy-duty vapor barrier to control ground moisture, and seal all penetrations and openings that allow outside air and humidity to get in. Every part of the job works together — insulation alone without moisture control does not last, and a vapor barrier without proper insulation does not fix the thermal problem.

A properly encapsulated crawl space makes your home warmer, your floors more comfortable, and your air quality measurably better. It also protects the wood framing and structure beneath your home from the slow damage that unchecked moisture causes over years. If you have cold floors, high humidity, or a crawl space that has never been properly addressed, this is one of the most impactful upgrades you can make to a Chicago-area home. Reach out to OTS Chicago Insulation for a free assessment and find out exactly what your crawl space needs.

What We Offer:

Crawl Space Assessment — Before any work begins, we inspect the crawl space for moisture levels, existing insulation condition, signs of mold or wood rot, and air infiltration points. You get a clear picture of what is there and what needs to be addressed.
Crawl Space Wall Insulation — We insulate the crawl space walls to create a thermal barrier between the outside ground conditions and your home's living space. This stops cold air from rising through the floor above and stabilizes temperature throughout the lower level.
Vapor Barrier Installation — A heavy-duty vapor barrier is installed across the crawl space floor to stop ground moisture from evaporating upward into the home. This is one of the most effective ways to control humidity and prevent the conditions that lead to mold growth.
Full Encapsulation — Full encapsulation seals the entire crawl space — walls, floor, and all penetrations — creating a completely controlled environment beneath your home. This is the most effective long-term solution for homes with persistent moisture and air quality issues.
Air Sealing & Gap Closure — Vents, gaps around pipes, and other openings that allow outside air into the crawl space are sealed as part of the encapsulation process. Sealing these entry points is what makes the insulation and vapor barrier perform the way they should.
Crawl Space Floor Insulation — In homes where full encapsulation is not needed, we insulate the crawl space floor to reduce cold air transfer and improve comfort on the floor level above. This is a targeted solution for specific thermal performance goals.

Why Choose OTS Chicago Insulation for Crawl Space Insulation & Encapsulation

We Assess Before We Recommend — Crawl space conditions vary significantly from one home to the next. We look at your specific situation before recommending a solution. If full encapsulation is not what your crawl space needs, we will tell you that directly and recommend what will actually make a difference.
Moisture and Insulation Addressed Together — Treating insulation and moisture as separate problems leads to incomplete results. We handle both in a single project so the work holds up over time and the crawl space performs the way it should from the day the job is done.
Experience With Chicago-Area Homes — Crawl spaces in Des Plaines, Schaumburg, Naperville, and surrounding suburbs deal with specific moisture and cold conditions tied to Illinois winters and soil conditions. We have worked in enough of these homes to know what works and what does not in this climate.
One Team, Clean Work — The same crew that assesses your crawl space completes the installation. We work cleanly in a space that is already difficult to access, and we leave it in better condition than we found it. No separate contractors, no coordination gaps, no surprises after the job is done.
Serving the Full Chicago Metro Area — We provide crawl space insulation and encapsulation across Chicago, Des Plaines, Naperville, Arlington Heights, Evanston, Bolingbrook, Elmhurst, and more. Local experience shapes every recommendation we make for homes in this region.