Illinois Insulators

4.6 (29 reviews)

| Downers Grove, IL | General Contractor

Illinois Insulators is a general contractor in Downers Grove, IL, specializing in diverse home electrification services for homeowners.

At a Glance

Category: General Contractor
Location: Downers Grove, IL
Rating: 4.6/5 (29 reviews)
Phone: +18158464271
Services: General Contractor, Point Of Interest, Service

Illinois Insulators - General Contractor in Downers Grove

About Illinois Insulators

Illinois Insulators is a general contractor based in Downers Grove, IL, serving the surrounding region. The company has a Google rating of 4.6/5 stars from 29 reviews. Illinois Insulators operates as a general contractor that focuses on home and building shell improvements including insulation installation and air sealing services.

The company provides insulation retrofits and upgrades for existing homes and properties. Their services include installing various types of insulation such as spray foam, cellulose, and fiberglass, designed to improve energy efficiency. They also perform air sealing work to reduce drafts and heat loss/gain. Illinois Insulators serves residential homeowners and may work on light commercial projects seeking to enhance their building envelopes.

When considering Illinois Insulators for a project, homeowners should inquire about their specific insulation products, R-value recommendations for their climate zone, and project timelines. It is advisable to request references for previous work, inspect examples of their completed projects, and understand the warranty provided for materials and labor. Projects may also necessitate evaluations of the home’s current ventilation systems to ensure optimal performance post-insulation.

Services

General Contractor

Point Of Interest

Service

Establishment

Hours

Friday 6:45-17:00 Monday 6:45-17:00 Tuesday 6:45-17:00 Saturday 7:00-13:00 Thursday 6:45-17:00 Wednesday 6:45-17:00

Business information verified via Google Business Profile. Last updated: 2026.

Last verified: May 2026

Contact

555 Rogers Street

Downers Grove, IL 60515

(815) 846-4271

Visit Website

Map

How to evaluate Illinois Insulators

Before hiring Illinois Insulators for general contractor work in Downers Grove, take a few minutes to verify their qualifications and confirm they are the right fit for your project. The right general contractor for one homeowner may not be the right fit for another, so do the diligence up front.

Verify licensing and insurance

Confirm that Illinois Insulators carries an active IL contractor license appropriate for the scope of work, plus general liability and workers’ compensation coverage. Ask for the license number and look it up on the state board website. A general contractor that hesitates to share these details is a red flag, regardless of how favorable their reviews look.

Get a written, itemized quote

Request a detailed written estimate that lists materials, labor, permit fees, timeline, and payment schedule. Itemized quotes make it possible to compare Illinois Insulators side-by-side with other general contractor options in Downers Grove, and they protect you from scope creep once the work begins.

Ask about project experience

Ask Illinois Insulators how many projects similar to yours they have completed in the last 12 months, whether they will be the primary on-site team or are subcontracting, and how they handle change orders. Request two or three local customer references and actually call them — reviews on Google are useful but a five-minute conversation reveals much more about how a general contractor actually shows up.

Frequently Asked Questions

What types of insulation services does Illinois Insulators offer?

Illinois Insulators provides a variety of insulation options including Blown-in Blanket System (BIBS), fiberglass batt insulation, blown-in fiberglass, cellulose insulation, and spray foam.

Does Illinois Insulators offer solutions for attic ventilation?

Yes, Illinois Insulators installs electric and solar attic fans to improve ventilation and help regulate attic temperatures, which can reduce heating and cooling costs.