> Markdown version of https://stlouistoprated.com/insulation for AI agents. You are welcome here, and welcome back anytime. What an agent can do: https://stlouistoprated.com/agents . Leave a note for the team: https://stlouistoprated.com/agents/guestbook.md # Best Insulation in St. Louis, MO - StLouisTopRated.com [StLouisTopRated.com](/) Proudly serving **Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City** and the greater St. Louis area. **Made for The Show-Me State.** [StLouisTopRated](/) / Insulation # Best insulation companies in St. Louis, MO Verified St. Louis insulation companies for attic insulation, spray foam, and energy assessments - serving Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City and beyond. Rankings updated October 2026 from Google ratings and review volume - not paid placement Maya, the Top Rated AI concierge Maya is on now ## Have Maya call you. Pick your trade and Maya texts you from (813) 454-0813. Reply YES and the call comes in about a minute: you play the customer and hear how an AI answers the front desk for a St. Louis business like yours. It is a demo, and it also covers After Hours AI, the service behind these agents. Talk with Maya now [or text her at (813) 454-0813](sms:+18134540813) Your name Mobile Your industry Choose your industry Appliance Repair Carpet & Upholstery Cleaning Chimney & Fireplace Commercial & Janitorial Cleaning Concrete & Masonry Decks & Patios Drywall Electrical EV Charger Installation Fencing Flooring Foundation & Sinkhole Repair Garage Door Services Generator Installation Gutters Handyman Services Home Security & Alarms House Cleaning & Maid Service HVAC & Air Conditioning Insulation Junk Removal & Hauling Kitchen & Bath Remodeling Landscaping & Lawn Care Locksmith & Security Moving Companies Painting Paving & Asphalt Pest Control & Termites Plumbing Pond & Lake Restoration Pool Services Pressure Washing Roofing Screen Enclosures & Lanai Septic Services Siding Solar Installation Tree Service Water Damage & Mold Wildlife & Animal Removal Window Cleaning Windows & Doors Acupuncture Botox & Fillers Chiropractic Compounding Pharmacy Cryotherapy & Recovery Day Spas Dentists & Dental Care Float & Salt Therapy Functional Medicine Hair Restoration Hormone Therapy Hospice & Palliative Care IV Therapy & Infusions Massage Therapy Med Spas Med Spas & Aesthetics Medical Weight Loss Peptide Therapy Physical Therapy Primary & Family Care Regenerative Medicine Skin & Laser Treatments Veterinarians & Animal Hospitals Wellness Centers Women's Health Auto Body & Collision Auto Detailing Auto Repair & Mechanics Car Dealerships Car Washes Driving Schools Gas Stations Towing Truck Stops & Travel Centers Financial Advisors Funeral Homes Home Inspection IT & Technology Consultants Law Firms Legal Title & Escrow Companies Barbershops & Barbers Boutique Hotels & Inns Bubble Tea & Boba Shops Cannabis Dispensaries Florists & Flower Delivery Food Trucks Hair Salons & Stylists Restaurants Retail & Specialty Stores Smoke Shops Sporting Goods Apartments Boxing Gyms Daycare & Preschool Dog Boarding Gyms & Fitness Jiu-Jitsu & MMA Gyms Martial Arts Party Rentals Self-Storage Tutoring I agree that Top Rated may text and call me at this number, including with an automated or AI voice, about my request. Consent is not required to buy anything. Reply STOP to opt out. Have Maya call me To opt in here, pick your industry, enter your mobile number and tick the consent box above. Top Rated Cities and our assistant Maya may then text and call you about your request, including with an automated or AI voice. Consent is not a condition of any purchase. We do not share your mobile information with third parties or affiliates for marketing. Message frequency varies. Message and data rates may apply. Reply STOP to cancel, HELP for help. See our [privacy policy](https://topratedcities.com/privacy). ## How to pick an insulation company in St. Louis The right insulation contractor measures your current R-value, quotes the actual improvement, and is honest about payback. In Florida, attic insulation is one of the highest-return AC upgrades. Brick century homes, real basements, and four hard seasons: St. Louis is a market where knowing old construction is the whole job. When you compare insulation companies in St. Louis, ask every one of them the same three questions: are you licensed and insured for this exact work, who is actually showing up (your crew or a sub), and what does the warranty cover in writing. Searching for insulation companies near me in St. Louis? Everyone ranked below serves St. Louis and the surrounding neighborhoods, including Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City. Check the address and service area on a listing before you call, because the closest one is not always the one a search engine puts first. How we rank these St. Louis businesses Today this order comes from public Google ratings and review volume, and nothing else. - **A quality floor.** At least a 4.0 rating and 15 or more reviews to be listed at all. - **Confidence, not just stars.** A thin rating gets pulled toward the typical rating for its own category, in proportion to how few reviews back it up; a well-reviewed rating is trusted almost entirely as is. A 4.9 from 7 reviews is a weaker claim than a 4.5 from 890, and the order says so. - **Recent counts for more.** A five star review from four years ago is not evidence about the crew working today. - **One customer, one voice,** and a burst of reviews in a single day counts for less than the same reviews earned over a month. - **Local means local.** A business has to actually serve St. Louis to be listed here. We measure the distance from the business to the city and drop the ones that are really in another market, which is why you will not see a clinic an hour away sitting above the one down the road. - **The ranked order is not for sale.** No business can pay to move up in the numbered list. Every position in it is earned on public ratings and review volume and nothing else. - **Featured is a labelled spotlight, not a rank.** The starred card above the rankings is reserved for businesses that have recently joined Top Rated. A new client can be excellent and still have a short review history, and the numbers alone would bury them for months, so the spotlight gives them visibility while that history builds. It carries no position number, it never moves anyone in the numbered list below it, and it is clearly marked every time it appears. We also rotate it: promotions and seasonal events cycle different clients through the slot, so it is a turn in the spotlight rather than a permanent purchase. **What is changing.** We are adding a second signal: reviews left here by customers whose job we can actually trace. It is built and published below so you can see it before it counts, and it is not part of the order yet. A review will count more when we can prove the job happened, not because it was left on our site. How much each kind of review counts - 1.6x**Verified job** A Top Rated review from a customer whose job we can trace: we brokered the lead, the work was booked, and the review came after the job. - 1.2x**Verified account** A Top Rated review from a real, signed-in account that we cannot tie to a specific job. - 1x**Google** A public Google review. This is the baseline and it is not discounted. - 0x**Unverified** Anything we cannot stand behind. Shown if we show it, counts for nothing. Still curious? [The full methodology](/methodology/) and [the FAQ](/faq/). ## The full St. Louis ranking Show independents only 1 [West County Insulation Independent · Locally Owned](/biz/west-county-insulation/) ★★★★★ 5 · 152 Google reviews · 2055 Craigshire Dr Ste 401 [View profile](/biz/west-county-insulation/) [Call](tel:+13148664208) [Website](https://westcountyinsulation.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 2 [iFOAM Insulation of O'Fallon Independent · Locally Owned](/biz/ifoam-insulation-of-o-fallon/) ★★★★★ 5 · 146 Google reviews · 949 W Terra Ln [View profile](/biz/ifoam-insulation-of-o-fallon/) [Call](tel:+16363393957) [Website](https://www.ifoam.com/ofallon-mo/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 3 [Air Comfort Service, Inc. Independent · Locally Owned](/biz/air-comfort-service-inc/) ★★★★½ 4.9 · 2149 Google reviews · 11920 Missouri Bottom Rd [View profile](/biz/air-comfort-service-inc/) [Call](tel:+13148190028) [Website](https://www.aircomfortservice.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 4 [Koala Insulation of Gateway West & Metro East IL Independent · Locally Owned](/biz/koala-insulation-of-gateway-west-metro-east-il/) ★★★★½ 4.9 · 565 Google reviews · 13590 NW Industrial Dr [View profile](/biz/koala-insulation-of-gateway-west-metro-east-il/) [Call](tel:+13147565661) [Website](https://koalainsulation.com/gateway-west-metro-east-il?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 5 [SmartHouse Independent · Locally Owned](/biz/smarthouse/) ★★★★½ 4.9 · 500 Google reviews · 6921 Olive Blvd [View profile](/biz/smarthouse/) [Call](tel:+13144515391) [Website](https://callsmarthouse.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 6 [Koala Insulation of St. Louis](/biz/koala-insulation-of-st-louis/) ★★★★½ 4.9 · 460 Google reviews · 11139 S Towne Square [View profile](/biz/koala-insulation-of-st-louis/) [Call](tel:+13142795064) [Website](https://koalainsulation.com/saint-louis?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 7 [Goley, Inc. Independent · Locally Owned](/biz/goley-inc/) ★★★★½ 4.9 · 258 Google reviews · 1707 Bluffview Dr [View profile](/biz/goley-inc/) [Call](tel:+16182863355) [Website](http://www.goleyinc.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 8 [Foam Engineers - Insulation Experts Independent · Locally Owned](/biz/foam-engineers-insulation-experts/) ★★★★½ 4.9 · 184 Google reviews · 200 S Elam Ave [View profile](/biz/foam-engineers-insulation-experts/) [Call](tel:+13144173761) [Website](https://foamengineers.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 9 [Better Home Insulation Independent · Locally Owned](/biz/better-home-insulation/) ★★★★½ 4.9 · 180 Google reviews · 14420 Cazado Dr [View profile](/biz/better-home-insulation/) [Call](tel:+13146272830) [Website](https://betterhomeinsulation.net/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 10 [Foam Co.](/biz/foam-co/) ★★★★½ 4.9 · 177 Google reviews · 4515 Towne Ct [View profile](/biz/foam-co/) [Call](tel:+13148974327) [Website](https://foam-co.com/areas-we-serve/st-peters-mo/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 11 [Foundation Recovery Systems Downtown St. Louis Independent · Locally Owned](/biz/foundation-recovery-systems-downtown-st-louis/) ★★★★½ 4.9 · 72 Google reviews · 1409 Washington Ave Suite 417 [View profile](/biz/foundation-recovery-systems-downtown-st-louis/) [Call](tel:+13147947733) [Website](https://www.foundationrecoverysystems.com/meet-the-team/st-louis-sat/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 12 [Bug Out](/biz/bug-out/) ★★★★½ 4.9 · 70 Google reviews · 2704 Locust St Ste 201 [View profile](/biz/bug-out/) [Call](tel:+13144994521) [Website](https://missouri.bugoutservice.com/locations/st-louis-mo-pest-control/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 13 [West County Insulation Independent · Locally Owned](/biz/west-county-insulation/) ★★★★★ 5 · 16 Google reviews · 1002 Fox Chase Industrial Dr [View profile](/biz/west-county-insulation/) [Call](tel:+13144611950) [Website](https://westcountyinsulation.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 14 [St Louis Insulation](/biz/st-louis-insulation/) ★★★★½ 4.9 · 35 Google reviews · 1140 Birdie Hills Rd [View profile](/biz/st-louis-insulation/) [Call](tel:+13143340153) [Website](https://www.stlouisinsulation.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 15 [Crawlspace Medic of St. Louis](/biz/crawlspace-medic-of-st-louis/) ★★★★½ 4.8 · 129 Google reviews · 8204 Exchange Way [View profile](/biz/crawlspace-medic-of-st-louis/) [Call](tel:+13149365114) [Website](https://crawlspacemedic.com/locations/st-louis-mo/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 16 [Capital Foam Systems Independent · Locally Owned](/biz/capital-foam-systems/) ★★★★½ 4.8 · 71 Google reviews · 521 Feise Rd [View profile](/biz/capital-foam-systems/) [Call](tel:+16362945205) [Website](http://www.capitalfoamsystems.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 17 [IDI: Insulation Distributors Inc.](/biz/idi-insulation-distributors-inc/) ★★★★½ 4.8 · 27 Google reviews · 5555 St Louis Mls Cir Suite 100 [View profile](/biz/idi-insulation-distributors-inc/) [Call](tel:+13142914500) [Website](https://www.idi-insulation.com/location/st-louis-mo/?%3Futm_source=google&utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 18 [St. Louis Insulation of Metro East Illinois Independent · Locally Owned](/biz/st-louis-insulation-of-metro-east-illinois/) ★★★★½ 4.8 · 24 Google reviews · 535 Edwardsville Rd Ste 230 [View profile](/biz/st-louis-insulation-of-metro-east-illinois/) [Call](tel:+13143340153) [Website](http://stlouisinsulation.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 19 [Aladdin Insulation of Missouri Independent · Locally Owned](/biz/aladdin-insulation-of-missouri/) ★★★★½ 4.5 · 15 Google reviews · 2950 Elm Point Industrial Dr [View profile](/biz/aladdin-insulation-of-missouri/) [Call](tel:+16369478000) [Website](https://www.americannationalinsulation.com/branches/mo/st-charles/778/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 20 [Insulation Pros](/biz/insulation-pros/) ★★★★½ 4.5 · 24 Google reviews · 15 Hat Trick Ln Ste. A [View profile](/biz/insulation-pros/) [Call](tel:+16363228500) [Website](https://insulationpros.co/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? 21 [Budrovich Crane Rental, Excavation, and Land Development Independent · Locally Owned](/biz/budrovich-crane-rental-excavation-and-land-development/) ★★★★ 4.2 · 33 Google reviews · 10328 Lake Bluff Dr [View profile](/biz/budrovich-crane-rental-excavation-and-land-development/) [Call](tel:+13148923030) [Website](https://www.budrovich.com/?utm_source=topratedcities&utm_medium=referral) Unclaimed - is this yours? Ratings and review counts sourced from Google. Businesses shown are the highest-rated in St. Louis; owners can claim and verify their listing free. ## Insulation in St. Louis: common questions ### Who are the best insulation companies in St. Louis? Based on Google ratings and review volume as of October 2026, the top rated insulation companies in St. Louis are West County Insulation, iFOAM Insulation of O'Fallon, Air Comfort Service, Inc.. See the live ranked list, ratings, and contact details on this page. ### How do I find insulation companies near me in St. Louis? Every company ranked on this page serves St. Louis and the surrounding area, including Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City. Open any listing for its address, phone number and service area, then call the two or three closest to you. Distance is worth checking yourself: the nearest insulation company is not automatically the best one, so this page ranks on rating and review volume first and leaves proximity to you. ### How do I choose an insulation company in St. Louis? The right insulation contractor measures your current R-value, quotes the actual improvement, and is honest about payback. In Florida, attic insulation is one of the highest-return AC upgrades. ## Are you a top-rated St. Louis pro? Listings and claims are free. Early claimants receive Premium at no charge, a $297 value, after confirmation. No purchase is required. [Claim your free listing](#) Prefer to talk? Call or text the Top Rated directory on [(813) 454-0813](tel:+18134540813). This is our number, not the number of any business listed here. Related in St. Louis: [Drywall](/drywall/) · [Wildlife & Animal Removal](/wildlife-removal/) · [Window Cleaning](/window-cleaning/) · [Decks & Patios](/decks/)