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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 rate90%
139 neighbors recently requested a quote
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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
202 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 Infinity Exteriors, LLC
Infinity Exteriors, LLC
4.9(
21
)

Serving Cortland, IL and surrounding areas

Approved (Corporate)

In business since 1997

Free estimates

Warranties offered

"I have requested couple of different quotes to replace the roof on my garage. I decided to go with Infinity Exteriors. Logan Rezash worked with me who gave me the best deal. He was very professional and easy to talk to and explained in full details what they will provide me with my project. The materials and the warranty on the project that works for my budget. They kept me informed of the status of the project from the start to the finish. Their team that worked on the job was very polite and fast. They did an excellent job. They cleaned the yard and twice doubled checked for any loose nails around the garage. If you have a project to be done, I would recommend Infinity for your project. Dragica Miladinovic"
LP SmartSide
LP SmartSide
LP SmartSide
LP SmartSide
LP SmartSide

+16

Response time5 days
29 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Home Genius Exteriors
Home Genius Exteriors
4.8(
311
)

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."
320 neighbors recently requested a quote
Recommended by76%of homeowners
Request Quote
Avatar for Allied Construction and Roofing, LLC
Allied Construction and Roofing, LLC
3.5(
207
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Great service fixing our roof that had a few loose shingles. They were able to identify the problem and fix it in the same day. Would hire again."
tear off
tear off
tear off
new roof
new roof

+41

Response time2 days
92 neighbors recently requested a quote
Recommended by85%of homeowners
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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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Showing 1-10 of 136
Roofing questions, answered by experts

If your roof has a vapor barrier, you will need approximately one square foot of roof vent for every 300 square feet of ceiling space. If there is no vapor barrier, the roof should have one square foot of roof vent for every 150 square feet of ceiling space. If you are not comfortable making this determination, a local roofing professional can help.

The purchase price of 3-tab shingles is less than that of other material varieties, such as architectural shingles. However, 3-tab shingles generally last far fewer years than even the least expensive architectural ones. Other roofing types, such as metal or clay, also cost more than 3-tab shingles. However, if you plan to stay in your home for many years, the long-term cost of any of these options can compete with 3-tabs because of their longevity.

The amount of hail damage that warrants a roof replacement depends on the size of the hail. In many cases, a roof replacement is needed if your roof gets hail that is 1 inch or larger in diameter. You may also need to replace a roof due to hail damage if you notice several dents in the shingles or there are seven to 10 hail impact marks within a 10x10 foot area on your roof.

Asking questions before hiring a roofer ensures you receive the best quality for your investment upfront and in the long term. Roofers with minimal experience, unfamiliar with local building codes, or minimal access to great materials can lead to both structural and financial problems down the line. You should also be able to easily communicate and collaborate with your roofer during extensive projects.

Gaps between tiles are necessary to help with weatherproofing, allow for thermal expansion, and increase wind resistance. In general, a small gap no larger than 3 millimeters wide will encourage proper drainage and limit cracking. Beyond that, tiles should overlap a minimum of 3 inches, except at the eaves where they should extend to the center of the gutter.

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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