Crawl Space Encapsulation in Lombard, Illinois
26 crawl space companies serve Lombard, Illinois, with 2,803 customer reviews between them. Most full-service crawl space contractors handle encapsulation even when it isn't listed separately — confirm scope when comparing quotes. Local encapsulation typically runs $2,850–$7,750.
Get sealed crawl space quotes from Lombard contractors who specialize in vapor barriers, vent sealing, and dehumidification. For broader services, see all crawl space repair contractors in Lombard.
Lombard Encapsulation Cost — Midwest — Radon + Moisture
Variable: humid summers (70–85%), dry winters (30–45%). Primary driver: radon mitigation, flooding, clay-soil moisture.
Cost varies with crawl space sq ft, vapor barrier mil thickness, dehumidifier sizing, and wall insulation. Get 2–3 quotes for an exact number.
Why Encapsulation Matters in Lombard
The Midwest is the highest-radon region in the country. Encapsulation here is most effective when paired with active radon mitigation — the same vapor barrier that blocks moisture also blocks soil gas. Bundling encapsulation with radon mitigation typically saves $500–$1,200 vs separate installations.
What a Lombard Encapsulation System Should Include
- ✓12–20 mil vapor barrier with sealed seams (radon-rated)
- ✓Active radon mitigation system (sub-membrane depressurization)
- ✓Sump pump and interior drainage (heavy clay soils retain water)
- ✓Wall insulation R-10 to R-15
- ✓Dehumidifier sized 70–90 pints/day
- ✓Reinforced barrier in flood-prone areas
What to Watch For in Illinois
- !Test radon BEFORE encapsulation. If levels are high, design the system for radon mitigation from day one — retrofitting is expensive
- !Demand a barrier with sealed seams, not just overlapped — radon migrates through gaps
- !Confirm the contractor is licensed for both encapsulation AND radon mitigation (different licenses in many states)
Encapsulation Contractors in Lombard
Crawlspaces.com
502 Stratford Ave, Elmhurst, IL 60126, USA
53 reviews
Koala Insulation of Chicago - Western Suburbs
67a Eisenhower Ln S, Lombard, IL 60148, USA
508 reviews
Acculevel
640 S Washington St Suite 213, Naperville, IL 60540, USA
20 reviews
DK Concrete Contractor & Foundation Excavation
5203 Main St, Downers Grove, IL 60515, USA
7 reviews
ProX Foundation Crack Repair
9066 Lunt Ave, Schaumburg, IL 60193, USA
20 reviews
Matson Waterproofing Solutions
811 N Gary Ave, Wheaton, IL 60187, USA
2 reviews
GCPRO Restoration
220 Eisenhower Ln N, Lombard, IL 60148, USA
192 reviews
Concept Concrete and Waterproofing
1105 Curtiss St, Downers Grove, IL 60515, USA
9 reviews
DV Foundation Cracks & Concrete Step Repair
299 N Bolingbrook Dr, Bolingbrook, IL 60440, USA
4 reviews
Defense
5200 Thatcher Rd unit 113, Downers Grove, IL 60515, USA
46 reviews
2nd Chance Water Restoration
1020 Republic Dr #6, Addison, IL 60101, USA
236 reviews
Accu-Dry Waterproofing & Concrete Pumping, Inc.
1049 Zygmunt Circle, Westmont, IL 60559, USA
202 reviews
L&P BASEMENT WATERPROOFING LLC INSURANCE & BONDED
272 E Lincoln Ave, Glendale Heights, IL 60139, USA
52 reviews
ULB-DRY Waterproofing
705 N Princeton Ave, Villa Park, IL 60181, USA
62 reviews
Real Seal Basement Waterproofing & Foundation Repair
570 Estes Ave, Schaumburg, IL 60193, USA
610 reviews
Midwest Aerobiology Labs (Mold & Asbestos Inspectors)
1755 Park St suite#200, Naperville, IL 60563, USA
209 reviews
SERVPRO of Elmhurst
205 E Butterfield Rd Suite 105, Elmhurst, IL 60126, USA
54 reviews
Wing Three Mold Removal
440 W Irving Park Rd Suite 6, Roselle, IL 60172, USA
17 reviews
Chicagoland Water Medics
970 Dupage Ave, Lombard, IL 60148, USA
88 reviews
Green Home Solutions of Chicago West Suburbs/Dupage (IL)
367 S Rohlwing Rd Suite O, Addison, IL 60101, USA
81 reviews
The Mold Genius
850 E Higgins Rd # 125F, Schaumburg, IL 60173, USA
218 reviews
Premium Waterproofing, Inc.
520 S River St, Batavia, IL 60510, USA
39 reviews
Basement Buddies Waterproofing
628 S Woodlawn St, Wheaton, IL 60187, USA
35 reviews
Concrete Corporation
1102 Hill Ave # 1A, Glen Ellyn, IL 60137, USA
22 reviews
Basement-escape.com by Crawlspace Pros
4935 Kingston Ave, Lisle, IL 60532, USA
12 reviews
Encapsulation FAQs — Lombard, Illinois
Which companies offer crawl space encapsulation in Lombard?
Crawlspaces.com (5.0★), Koala Insulation of Chicago - Western Suburbs (5.0★), Acculevel (5.0★) are the top-rated crawl space companies in Lombard, and most full-service contractors handle encapsulation — ask for it specifically when requesting quotes.
How many crawl space contractors serve Lombard?
26 crawl space companies are listed for Lombard; Koala Insulation of Chicago - Western Suburbs is the highest-rated at 5.0★ (508 reviews). Pros in nearby Chicago and Milwaukee also cover the area.
How much does crawl space encapsulation cost in Lombard, Illinois?
Crawl space encapsulation in Lombard, Illinois typically costs $2,850–$7,750 for a complete system. Pricing depends on crawl space size, vapor barrier mil thickness (12-mil to 20-mil), whether a dehumidifier is included, and wall insulation specs. Midwest — Radon + Moisture pricing reflects local labor rates and climate-driven scope.
What vapor barrier thickness is best for Lombard?
20-mil radon-rated is recommended if you are mitigating radon. For moisture-only projects, 12-mil is sufficient. Always specify "radon-rated" if radon levels are >2 pCi/L.
Do I need a dehumidifier with encapsulation in Lombard?
A 70–90 pint/day unit covers most Midwest crawl spaces. Pair with the radon fan — they handle different problems but share the same sealed envelope.
How long does crawl space encapsulation last?
A professional encapsulation system in Lombard lasts 15–25 years. The vapor barrier itself (especially 20-mil reinforced products) can last 25+ years. Dehumidifiers should be serviced annually and replaced every 8–12 years. Most contractors offer transferable warranties of 10–25 years on the vapor barrier and 5–7 years on the dehumidifier.
When is the best time of year to encapsulate a crawl space in Lombard?
Late summer through fall (August–October). Avoid spring — flooding makes crawl space access unsafe and wet substrate prevents proper barrier adhesion.
Expected ROI
Radon reduction alone is a health benefit, not a financial one — but it is required disclosure on real estate transactions in most Midwest states. Encapsulation + radon mitigation together typically add $8K–$18K to home value vs unmitigated.
Best Season to Schedule
Late summer through fall (August–October). Avoid spring — flooding makes crawl space access unsafe and wet substrate prevents proper barrier adhesion.
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Encapsulation Guides
Midwest — Radon + Moisture
Variable: humid summers (70–85%), dry winters (30–45%).