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TRUSTED BY CORTLAND, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon170
    Verified roofing services reviews

Verified Reviews for Roofing pros in Cortland, IL

*The Angi rating for Roofing companies in Cortland, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Roofing needs.

*The HomeAdvisor rating for Roofing companies in Cortland, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Roofing needs.

Last update on July 09, 2026

Find Roofers in Cortland

Avatar for Guardian Roofing Systems, LLC
Guardian Roofing Systems, LLC
4.9(
68
)

Serving Cortland, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Emergency services offered

"Angelo was helpful, thoughtful, and professional during the entire process. He explained everything thoroughly to make sure we knew what we were getting and communicated every step along the way. We wouldn't hesitate to call Guardian Roofing for any future roofing needs."
roof coating
new roof installation
decking
insulation
base sheet

+13

Response time2 days
Response rate91%
105 neighbors recently requested a quote
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Avatar for Rogers Roofing
Rogers Roofing
4.6(
131
)

Serving Cortland, IL and surrounding areas

Approved

In business since 1968

Free estimates

Warranties offered

"Victors Roofing was great! They were efficient and did a great job on our roof. Would definitely recommend them to anyone"
Roofing Project
Roofing Project
Roofing Project
Roofing Project
Roofing Project

+7

568 neighbors recently requested a quote
Recommended by84%of homeowners
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Avatar for Boss Roofing - Siding Experts, Inc.
Boss Roofing - Siding Experts, Inc.
4.8(
42
)

Serving Cortland, IL and surrounding areas

Approved (Corporate)

In business since 2005

Free estimates

Emergency services offered

"I had Boss Roofing go to my rental properties outside of Ft Myers to check the tile roofing to see if it might have been damaged from Hurricane Irma. They were quick to check out, access and repair. I would highly recommend them for repairs or replacement."
Free Roof Giveaway
Free Roof Giveaway
Asphalt Roofing
Asphalt Roof
Asphalt Roofing

+5

Response time3 hrs
182 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Home Genius Exteriors
Home Genius Exteriors
4.7(
263
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"While removing the old roof, the aluminum coverings on our mansard roof dormers were damaged. The roofing crew attempted to repair the damage but the result was not satisfactory. As compensation they deducted a small amount from the total bill."
Recommended by87%of homeowners
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Avatar for Home Genius Exteriors
Home Genius Exteriors
4.7(
269
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"While removing the old roof, the aluminum coverings on our mansard roof dormers were damaged. The roofing crew attempted to repair the damage but the result was not satisfactory. As compensation they deducted a small amount from the total bill."
2680 neighbors recently requested a quote
Recommended by86%of homeowners
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Avatar for Home Genius Exteriors
Home Genius Exteriors
4.8(
314
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"It was easy to work with home genius. They were very punctual and responded well to every question. The crew worked very efficiently and finished the roof in less than a day. Over all love the new roof."
356 neighbors recently requested a quote
Recommended by75%of homeowners
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Avatar for ONESOURCE ROOFING CONTRACTORS & CONSULTING LLC
ONESOURCE ROOFING CONTRACTORS & CONSULTING LLC
4.4(
7
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"I've hired OneSource for a variety of repairs and replacement project of all kinds, including flat and shingle roofing. They are the best! Timely, good communication, and their team is fantastic to work with. I would absolutely recommend working with them!"
Photo 1
EPDM Roof - Apartment
EPDM Roof - Apartment
EPDM Roof - Apartment
EPDM Roof - Apartment

+68

3 neighbors recently requested a quote
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Avatar for J&K Home Improvement & Restoration
J&K Home Improvement & Restoration
5.0(
8
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2005

Free estimates

Credit card accepted

"We have once again reached out to Joe Kim at J & K Home Improvements when we had a new project planned. We were completely satisfied when we replaced our siding and roof with Joe. Now Joe and his professional crew have replaced all our windows . There are never surprises or additions from when the job is quoted. Once again we are totally satisfied and delighted with their work!! It has been a stress free experience each and every time."
Roofing
Siding Job
GAF Shingles
Siding job site
Modifed Bituman

+2

Recommended by100%of homeowners
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Avatar for NEW TECH GENERAL CONTRACTORS LLC
NEW TECH GENERAL CONTRACTORS LLC
5.0(
9
)

Serving Cortland, IL and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"They did an absolutely amazing job building my deck. I love it! They do great work. I’ll have them do more work for me. I definitely recommend them. Thank you so much!"
Anderson
Anderson
Anderson
Lee Illinois
Lee Illinois

+25

Response time3 days
Response rate93%
39 neighbors recently requested a quote
Request Quote
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Showing 1-10 of 136
Roofing questions, answered by experts

The golden ratio for roof pitch is 1:1.62. It’s simply a standard aspect ratio that home and building designers and architects use when deciding how steep a roof should be to maintain visual appeal. The golden ratio can apply to any home or structure with a visible roof that isn't considered a flat roof.

Yes, roof ridge caps are a necessary part of your roof system. Your roof ridge cap is at the peak of your roof, where two slopes of your roof meet. Roof ridge caps seal the seam and help protect your roof from water and debris, and because they’re pre-bent and thicker, they’re more suited to the job than regular roof shingles, which can break when bent.

Roof leaks develop quickly and can cause serious damage to your house and in extreme cases, quite nearly ruin it. Roof leaks have been known to affect even the foundations of a home, so taking care of any issues as soon as they pop up—or even before—is of the utmost importance.

Asphalt shingles blister when air gets trapped between building materials, either within the layers of the shingle itself or in adhesives on the undersides of the shingles. As the roof heats up in direct sunlight, the trapped gas expands and creates a bubble in the roof. Eventually, the bubble can pop, leaving an exposed area of decking and underlayment.

Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

The Cortland, IL homeowners’ guide to roofing services

From average costs to expert advice, get all the answers you need to get your job done.

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