Roofing contractor
Promax Construction
141 W Main St, Decatur, IL 62523
- Google average
- 4.8
- Ratings counted
- 90
- One and two star
- 4 of 90(4.4%)
- Illinois median
- 1.7%
The first three are Google’s own figures for Promax Construction, read on 24 September 2026; the share is of every rating Google has counted, not of the review texts on this page. The median is ours — the middle figure among the Illinois roofers we list with enough ratings to compare.
Rating breakdown
| 5 | 82 | 91% | |
|---|---|---|---|
| 4 | 2 | 2% | |
| 3 | 2 | 2% | |
| 2 | 0 | 0% | |
| 1 | 4 | 4% |
About typical — the typical roofer in Illinois sits at 1.7%. A higher share is a reason to read the critical reviews below, not a verdict.
The critical reviews
The one and two-star reviews, first. These are what a star average hides, and they are the reason this page exists.
All 4 of the one and two-star reviews we hold for Promax Construction, most recent first.
- 1 out of 5Raven Windsor2 months ago
Terrible clean-up and preventing nails in driveway and all over yard. Took our cameras down to complete roof.....understandable. Found one camera in the middle of yard. Went to weed my landscaping and got a nail through finger. Four nails within a 1 foot perimeter. Unreal
- 1 out of 5Bri Baker2 years ago
Warning! had a white male in a white promax shirt taking pictures of me without consent or permission
Reply from the business
Hello, can you please call our office at 217-424-8900 or email info@promaxconstruction.com so we can investigate this issue. We would like to get more info on the person and location so we can get to the bottom of this. We regret you had this experience. We do take a lot of photos around town of our projects so there may be a misunderstanding. These photos are necessary for us to manage projects and keep records.
- 1 out of 5James Phillips8 years ago
Called to get estimates. Had to call back myself, not a man of his word. Does not seem organized always has to call you back. Would not recommend.
Reply from the business
Mr. Phillips sorry to hear about your experience. Please call our office number so we can address your issue promptly. We ask customers to call our office # to schedule estimates at 217-424-8900. Our sales staff does their best to return calls on their cell phones, but they can get very busy and mistakes happen.
- 1 out of 5Mary OMalley8 years ago
I have no idea how this company received 5 stars unless it was a different crew. They are currently working on roof next store and its a nightmare. The workers look high on drugs and I've gotten cussed out over their mistakes. I don't know why its taking soooooo very long. But can't wait till they are done. I won't even give them 1 star
Reply from the business
Mary sorry to hear about your experience. If you wouldn't mind emailing us your address or the address of the home that was being worked on we'd like to investigate this issue and make any corrections with the crew that cussed at you. Since your not a customer of ours, we are unsure what Promax project you are referring to. If what you are saying is true, we understand your frustration and appreciate the feedback so we can make the necessary corrections. Our email is info@promaxconstruction.com
What reviewers keep mentioning
Topics Google extracted from this business’s reviews, with how many mention each. These are words that appeared in reviews, which is not the same as a service the business sells.
- roofing19
- friendly staff16
- painting10
- siding9
- gutters7
- roof repair6
- drywall repair6
- storm damage repair4
- gutter repairs4
- fast roofing job3
- fast completion3
- fair quote2
Other reviews we hold
14 more of the 75 reviews we hold text for, most recent first. We do not hold every review Google has.
- 5 out of 5Aaron Stallone3 weeks ago
Had a small porch rebuild on my house. Promax came promptly and gave a fair estimate. Communication is so important, and John always responded to calls and texts. Ron and Tommy are excellent carpenters, very professional, and did amazing work.
- 5 out of 5Paul Rutherford3 weeks ago
Old house needed 16 windows replaced. Within a few weeks got them measured, ordered, and installed. Great experience
- 5 out of 5Clay Whtneya month ago
Could not be any more satisfied with Promax Construction. The other day my wife sent me a picture of a couple of shingles that were in our backyard, and this happened to be late on a Thursday afternoon with storms in the forecast. I called …
Google cut this review short. The full text is on their Google profile.
- 5 out of 5Anna Peters2 months ago
John and crew were professional, timely, and very communicative. They understood our vision and drastically changed the curb appeal of our house with our new gutters!
- 5 out of 5Rex Dummermuth2 months ago
We love our new deck and it's practically maintenance free!
- 5 out of 5Bobbi Donath3 months ago
We had some interior painting done as well as some interior and exterior trim replaced. I have nothing but positive things to say about the experience. From the quote to the completion - friendly, efficient and great work all around! We couldn't be happier with all of the work!
- 5 out of 5Deanne Krug6 months ago
These folks are superheroes. John is a great man to work with and he has great employees like Antonio working for him. Antonio and his wife are thoroughly professional, courteous and detailed from start to finish. We trust completely in ProMax for our home issues. They come to our rescue! Thank you ProMax!
- 5 out of 5Anthony Nulf6 months ago
Pro Max gave an excellence pricing they worked hard and got it done that day very nice hard workers
- 5 out of 5John Beyer6 months ago
We recently had some wind damage to our roof. Promax was responsive and fixed it quickly and before the next rainstorm! Thanks for the help!
- 5 out of 5Thomas Smith7 months ago
John stands with what he says he will do! John has done several jobs in the past for us and today my bathroom was painted. Great job once again! Thanx John!
- 5 out of 5Piper Foote7 months ago
I recently moved into my new home and my sunroom needed to be redone. Previously, the windows could not open and almost all of my structural beams were completely rotted. Promax gave me a very affordable quote and answered all of my questions without hesitation. They got me in very quickly and were very nice while on site at my home. They even made sure to give my puppy some special attention. I am extremely happy with the results - all my windows open and have screens, and the structure was rebuilt the right way to prevent water damage moving forward. I could not recommend ProMax or John enough! We will be calling them for any future help without hesitation.
- 5 out of 5Blennard SpringfieldEdited 8 months ago
I've had some work done by Promax Home Upgrades and Maintenance, and honestly, they went above and beyond what I expected. The owner, John Schilawski, personally oversees everything and keeps things running super smoothly and professionally.
- 5 out of 5Kyle James11 months ago
Promax gave a great, competitive quote. Then they came in and had one of the most professional crews I've seen. They put our roof on quick but not cheap. The crew were definitely experts and knew what they were doing. I'm amazed at the job …
Google cut this review short. The full text is on their Google profile.
- 5 out of 5Cynthia Reada year ago
Jeff from Promax came to my home, I needed new gutters, siding on back of my house replaced. He was so nice and informative when explaining what would be needed. I asked about painting the entire house and was excited to hear Promax does …
Google cut this review short. The full text is on their Google profile.
What Promax Construction says about itself
Taken from the business’s own website. We have not checked any of it. These are quotes, not credentials — a roofer writing “licensed and insured” on their homepage is not evidence that they are.
Licensed
“…CAREERS CONTACT US Best Value on Roofs Licensed and insured roofers in Central…”
Insured
“…ACT US Best Value on Roofs Licensed and insured roofers in Central Illinois with…”
States years in business
“…OVER 25 YEARS IN BUSINESS Experience is critical in…”
Free estimates
“…Free Estimate Spring Video SERVICES COMMERCIAL…”
Family owned
“…Construction is an independent and family owned company founded in 2000 by John…”
Their site also states: states a founding year.
Other roofers in Decatur
Ranked by how many ratings Google has counted.
| Roofing contractor | Google average | Ratings counted | One and two star | Contact |
|---|---|---|---|---|
| Central Roofing LLCclean up, courteous staff, initial inspection4.9686 ratings1.9% one and two star(217) 728-7663 | 4.9 | 686 | 1.9%13 of 686 | (217) 728-7663 |
| Responsive Roofing, LLCprofessional crew, siding replacement, competitive pricing5.0283 ratings0% one and two star(815) 901-8860 | 5.0 | 283 | 0%0 of 283 | (815) 901-8860 |
| D & R Roofing Inccourteous staff, quick work, storm damage repair4.9181 ratings2.8% one and two star(217) 864-2631 | 4.9 | 181 | 2.8%5 of 181 | (217) 864-2631 |
| Redeemed Roofing, LLCclean up, roof replacement, insurance coverage4.978 ratings2.6% one and two star(309) 580-1100 | 4.9 | 78 | 2.6%2 of 78 | (309) 580-1100 |
| J & M Roofingroof replacement, polite staff, siding4.878 ratings3.8% one and two star(217) 425-9900 | 4.8 | 78 | 3.8%3 of 78 | (217) 425-9900 |
| J J Swartz Companyinsurance work, remodel, workmanship4.564 ratings9.4% one and two star(217) 877-2611 | 4.5 | 64 | 9.4%6 of 64 | (217) 877-2611 |
Where this page comes from
Every figure above is Google’s, captured on 24 September 2026. The star average and the 90 ratings behind it are counted by Google across all of its reviews. The review text on this page is a sample — we hold 90, of which 75 have any text — and it is not everything Google shows.
Roof Warden does not verify licenses, bonds, insurance or workers’ compensation cover, and nothing on this page should be read as though we had. Confirm those directly with the contractor and with your state or provincial licensing body before you hire anyone.