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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
)
Flat, Foam or Single Ply Roofing - RepairFlat, Foam or Single Ply Roofing - Repair- For Business

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%
103 neighbors recently requested a quote
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Avatar for Rogers Roofing
Rogers Roofing
4.6(
131
)
Asphalt Shingle Roofing - Install or ReplaceAsphalt Shingle Roofing - RepairInspection - Roofing

Serving Cortland, IL and surrounding areas

Approved

In business since 1968

Free estimates

Warranties offered

"New roof and gutters...so far, so good...."
Roofing Project
Roofing Project
Roofing Project
Roofing Project
Roofing Project

+7

582 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
)
Asphalt Shingle Roofing - Install or ReplaceMetal Roofing - Install or Replace

Serving Cortland, IL and surrounding areas

Approved (Corporate)

In business since 2005

Free estimates

Emergency services offered

"Boss Roofing is a quality company that provides excellent work ."
Free Roof Giveaway
Free Roof Giveaway
Asphalt Roofing
Asphalt Roof
Asphalt Roofing

+5

Response time3 hrs
190 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Home Genius Exteriors
Home Genius Exteriors
4.7(
263
)
Asphalt Shingle Roofing - RepairInspection - RoofingRoof - Clean+1 more

Serving Cortland, IL and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"The roofing crew was fantastic. They listened to all of my concerns and took care of them. Everything was done to my complete satisfaction. The whole neighborhood loves the roof! Huge thanks to Ezra, Walter, and Lauren for making this process very easy."
Recommended by87%of homeowners
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Avatar for Home Genius Exteriors
Home Genius Exteriors
4.7(
269
)
Asphalt Shingle Roofing - RepairInspection - RoofingFlat, Foam or Single Ply Roofing - Repair+4 more

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."
2675 neighbors recently requested a quote
Recommended by86%of homeowners
Request Quote
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.8(
314
)
Asphalt Shingle Roofing - Install or ReplaceMetal Roofing - Install or ReplaceWood Shake or Composite Roofing - Install or Replace+2 more

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
)
Asphalt Shingle Roofing - Install or Replace - For BusinessFlat, Foam, or Single Ply Roofing - Install or Replace- For BusinessSealant for Roof - Apply- For Business+9 more

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

4 neighbors recently requested a quote
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Avatar for Nisley's Quality Coatings
Nisley's Quality Coatings
5.0(
17
)
Flat, Foam or Single Ply Roofing - RepairFlat, Foam or Single Ply Roofing - Repair- For BusinessFlat, Foam, or Single Ply Roofing - Install or Replace+5 more

Serving Cortland, IL and surrounding areas

Approved

In business since 2018

Free estimates

Customers say: Quick response

"I was a little skeptical about the gushing reviews, but I could not be happier. Super professional, great service and quality, new roof looks great, and at a competitive price."
Metal roof
Metal roof
Metal roof
Metal roof
Metal roof

+1

Response time2 days
Recommended by100%of homeowners
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Avatar for J&K Home Improvement & Restoration
J&K Home Improvement & Restoration
5.0(
8
)
Asphalt Shingle Roofing - Install or ReplaceAsphalt Shingle Roofing - Install or Replace - For BusinessFlat, Foam, or Single Ply Roofing - Install or Replace+5 more

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
Request Quote
Avatar for NEW TECH GENERAL CONTRACTORS LLC
NEW TECH GENERAL CONTRACTORS LLC
5.0(
9
)
Asphalt Shingle Roofing - Install or ReplaceAsphalt Shingle Roofing - RepairFlat, Foam or Single Ply Roofing - Repair+1 more

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%
37 neighbors recently requested a quote
Request Quote
...
Showing 1-10 of 137
Roofing questions, answered by experts

No, you can’t use your home’s square footage. You have to calculate your roof’s square footage, and then you may have to convert your square footage measurement to correspond with how the roofing material is measured. For instance, some roofing is sold in “squares,” which equals the total square footage of the roof divided by 100. Shingles are sold in bundles that may not correspond to the number of squares you need. Metal roofing is sold as sheets, so determine the amount of square feet each panel will cover and then divide the total square footage by the coverage area.

No, a chimney crown is not the same as a chimney cap. A chimney crown is a flat cement area on top of a masonry chimney. It starts where the masonry part of the chimney ends at the very top and domes upward toward the flue opening. A chimney cap sits on top of the crown over the flue. It is usually made of metal and allows smoke to escape without letting in rainwater.

Yes, moss can be dangerous for your roof if left in place to grow without treatment. The moss soaks up and holds moisture. Having a constantly damp roof could lead to problems with rot for the parts of the roof that consist of wood. Additionally, a patch of thick moss may draw insects and birds, which could damage the roof. Thick moss could block the roof’s drainage system. Water then may back up after a rainstorm and cause further damage that could eventually lead to roof repair expenses or the cost of roof replacement.

You can use silicone caulk around the upper lip of your roof vent boot to seal it temporarily, or you can slide a repair sleeve over the roof vent and old vent boot to stop air and water leaks temporarily. However, these aren’t permanent solutions, so you should always hire a professional to come out and replace the roof vent boot for a long-lasting fix and peace of mind.

In most cases, below 40 degrees Fahrenheit is too cold to replace a roof. The cold affects the shingles, making it more difficult to adhere them to your roof. It also becomes dangerous for contractors to get up on your roof in the cold weather, as there can be ice and slush causing surfaces to become slippery.

The Cortland, IL homeowners’ guide to roofing services

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